624 lines
24 KiB
Objective-C
624 lines
24 KiB
Objective-C
//
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// BRTextPickerView.m
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// BRPickerViewDemo
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//
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// Created by renbo on 2017/8/11.
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// Copyright © 2017 irenb. All rights reserved.
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//
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// 最新代码下载地址：https://github.com/agiapp/BRPickerView
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#import "BRTextPickerView.h"
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@interface BRTextPickerView ()<UIPickerViewDelegate, UIPickerViewDataSource>
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{
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BOOL _isSyncingRollingSelection; // 滚动未结束时批量同步，抑制 change 回调
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}
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/** 选择器 */
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@property (nonatomic, strong) UIPickerView *pickerView;
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/** 当前显示的数据源 */
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@property (nonatomic, copy) NSArray *dataList;
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@end
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@implementation BRTextPickerView
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#pragma mark - 1.显示【单列】选择器
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+ (void)showPickerWithTitle:(NSString *)title
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dataSourceArr:(NSArray *)dataSourceArr
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selectIndex:(NSInteger)selectIndex
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resultBlock:(BRSingleResultBlock)resultBlock {
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// 创建选择器
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BRTextPickerView *strPickerView = [[BRTextPickerView alloc]init];
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strPickerView.pickerMode = BRTextPickerComponentSingle;
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strPickerView.title = title;
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strPickerView.dataSourceArr = dataSourceArr;
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strPickerView.selectIndex = selectIndex;
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strPickerView.singleResultBlock = resultBlock;
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// 显示
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[strPickerView show];
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}
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#pragma mark - 2.显示【多列】选择器
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+ (void)showMultiPickerWithTitle:(NSString *)title
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dataSourceArr:(NSArray *)dataSourceArr
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selectIndexs:(NSArray <NSNumber *>*)selectIndexs
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resultBlock:(BRMultiResultBlock)resultBlock {
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// 创建选择器
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BRTextPickerView *strPickerView = [[BRTextPickerView alloc]init];
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strPickerView.pickerMode = BRTextPickerComponentMulti;
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strPickerView.title = title;
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strPickerView.dataSourceArr = dataSourceArr;
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strPickerView.selectIndexs = selectIndexs;
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strPickerView.multiResultBlock = resultBlock;
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// 显示
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[strPickerView show];
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}
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#pragma mark - 3.显示【联动】选择器
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+ (void)showCascadePickerWithTitle:(nullable NSString *)title
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dataSourceArr:(nullable NSArray *)dataSourceArr
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selectIndexs:(nullable NSArray <NSNumber *> *)selectIndexs
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resultBlock:(nullable BRMultiResultBlock)resultBlock {
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// 创建选择器
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BRTextPickerView *strPickerView = [[BRTextPickerView alloc]init];
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strPickerView.pickerMode = BRTextPickerComponentCascade;
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strPickerView.title = title;
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strPickerView.dataSourceArr = dataSourceArr;
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strPickerView.selectIndexs = selectIndexs;
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strPickerView.multiResultBlock = resultBlock;
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// 显示
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[strPickerView show];
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}
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#pragma mark - 初始化自定义选择器
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- (instancetype)initWithPickerMode:(BRTextPickerMode)pickerMode {
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if (self = [super init]) {
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self.pickerMode = pickerMode;
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}
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return self;
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}
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#pragma mark - 处理选择器数据 和 默认选择状态
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- (void)handlerPickerData {
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// 1.检查数据源数据格式是否有误
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BOOL dataSourceError = NO;
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if (self.dataSourceArr.count == 0) {
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dataSourceError = YES;
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}
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id item = [self.dataSourceArr firstObject];
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if (self.pickerMode == BRTextPickerComponentSingle) {
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dataSourceError = !([item isKindOfClass:[NSString class]] || [item isKindOfClass:[BRTextModel class]]);
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} else if (self.pickerMode == BRTextPickerComponentMulti) {
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dataSourceError = ![item isKindOfClass:[NSArray class]];
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} else if (self.pickerMode == BRTextPickerComponentCascade) {
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dataSourceError = ![item isKindOfClass:[BRTextModel class]];
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}
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if (dataSourceError) {
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BRErrorLog(@"数据源异常！请检查选择器数据源的格式");
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return;
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}
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// 2.处理默认选择状态
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if (self.pickerMode == BRTextPickerComponentSingle) {
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self.dataList = self.dataSourceArr;
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if (self.selectIndex < 0 || self.selectIndex >= self.dataList.count) {
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self.selectIndex = 0;
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}
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} else if (self.pickerMode == BRTextPickerComponentMulti) {
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self.dataList = self.dataSourceArr;
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NSMutableArray *selectIndexs = [[NSMutableArray alloc]init];
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for (NSInteger component = 0; component < self.dataList.count; component++) {
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NSArray *itemArr = self.dataList[component];
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NSInteger row = 0;
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if (self.selectIndexs.count > 0 && component < self.selectIndexs.count) {
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NSInteger index = [self.selectIndexs[component] integerValue];
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row = (index >= 0 && index < itemArr.count) ? index : 0;
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}
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[selectIndexs addObject:@(row)];
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}
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self.selectIndexs = [selectIndexs copy];
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} else if (self.pickerMode == BRTextPickerComponentCascade) {
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NSMutableArray *dataList = [[NSMutableArray alloc]init];
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[dataList addObject:self.dataSourceArr];
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NSMutableArray *selectIndexs = [[NSMutableArray alloc]init];
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BOOL hasNext = self.dataSourceArr.count > 0;
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NSInteger i = 0;
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NSInteger selectIndex = self.selectIndexs.count > 0 && i < self.selectIndexs.count ? [self.selectIndexs[i] integerValue] : 0;
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[selectIndexs addObject:@(selectIndex)];
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if (selectIndex >= 0 && selectIndex < self.dataSourceArr.count) {
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BRTextModel *selectModel = self.dataSourceArr[selectIndex];
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while (hasNext) {
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NSArray *nextArr = selectModel.children;
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if (!nextArr || nextArr.count == 0) {
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hasNext = NO;
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break;
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}
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[dataList addObject:nextArr];
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i++;
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selectIndex = self.selectIndexs.count > 0 && i < self.selectIndexs.count ? [self.selectIndexs[i] integerValue] : 0;
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[selectIndexs addObject:@(selectIndex)];
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if (selectIndex < nextArr.count) {
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selectModel = nextArr[selectIndex];
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}
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}
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}
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// 控制选择器固定显示的列数
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if (self.showColumnNum > 0) {
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NSInteger dataListCount = dataList.count;
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if (self.showColumnNum < dataListCount) {
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// 显示子集数据
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dataList = [[dataList subarrayWithRange:NSMakeRange(0, self.showColumnNum)] mutableCopy];
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selectIndexs = [[selectIndexs subarrayWithRange:NSMakeRange(0, self.showColumnNum)] mutableCopy];
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} else {
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// 补全占位数据
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for (NSInteger i = 0; i < self.showColumnNum - dataListCount; i++) {
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// 添加空白占位数据
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BRTextModel *placeholderModel = [[BRTextModel alloc]init];
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NSArray *placeholderArr = @[placeholderModel];
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[dataList addObject:placeholderArr];
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[selectIndexs addObject:@(0)];
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}
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}
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}
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self.dataList = [dataList copy];
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self.selectIndexs = [selectIndexs copy];
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}
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}
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#pragma mark - 选择器
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- (UIPickerView *)pickerView {
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if (!_pickerView) {
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CGFloat pickerHeaderViewHeight = self.pickerHeaderView ? self.pickerHeaderView.bounds.size.height : 0;
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_pickerView = [[UIPickerView alloc]initWithFrame:CGRectMake(0, self.pickerStyle.titleBarHeight + pickerHeaderViewHeight, self.keyView.bounds.size.width, self.pickerStyle.pickerHeight)];
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_pickerView.backgroundColor = self.pickerStyle.pickerColor;
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_pickerView.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
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_pickerView.dataSource = self;
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_pickerView.delegate = self;
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}
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return _pickerView;
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}
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#pragma mark - UIPickerViewDataSource
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// 1.返回组件数量
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- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
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switch (self.pickerMode) {
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case BRTextPickerComponentSingle:
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return 1;
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case BRTextPickerComponentMulti:
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case BRTextPickerComponentCascade:
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{
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if (self.pickerStyle.columnSpacing > 0) {
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return self.dataList.count * 2 - 1;
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}
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return self.dataList.count;
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}
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default:
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break;
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}
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}
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// 2.返回每个组件的行数
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- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
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switch (self.pickerMode) {
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case BRTextPickerComponentSingle:
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return self.dataList.count;
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case BRTextPickerComponentMulti:
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case BRTextPickerComponentCascade:
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{
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if (self.pickerStyle.columnSpacing > 0) {
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if (component % 2 == 1) {
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return 1;
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} else {
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component = component / 2;
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}
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}
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if (component < self.dataList.count) {
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return [self.dataList[component] count];
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}
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return 0;
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}
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break;
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default:
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break;
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}
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}
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#pragma mark - UIPickerViewDelegate
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// 3.设置 pickerView 的显示内容
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- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(nullable UIView *)view {
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// 1.自定义 row 的内容视图
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UILabel *label = (UILabel *)view;
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if (!label) {
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label = [[UILabel alloc]init];
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label.backgroundColor = [UIColor clearColor];
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label.textAlignment = NSTextAlignmentCenter;
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label.font = self.pickerStyle.pickerTextFont;
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label.textColor = self.pickerStyle.pickerTextColor;
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label.numberOfLines = self.pickerStyle.maxTextLines;
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// 字体自适应属性
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label.adjustsFontSizeToFitWidth = YES;
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// 自适应最小字体缩放比例
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label.minimumScaleFactor = 0.5f;
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}
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// 2.设置选择器中间选中行的样式
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[self.pickerStyle setupPickerSelectRowStyle:pickerView titleForRow:row forComponent:component];
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// 设置文本
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if (self.pickerMode == BRTextPickerComponentSingle) {
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id item = row < self.dataList.count ? self.dataList[row] : nil;
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if (item && [item isKindOfClass:[BRTextModel class]]) {
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BRTextModel *model = (BRTextModel *)item;
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label.text = model.text;
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} else {
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label.text = item;
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}
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} else if (self.pickerMode == BRTextPickerComponentMulti || self.pickerMode == BRTextPickerComponentCascade) {
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// 如果有设置列间距，且是第奇数列，则不显示内容（即空白间隔列）
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if (self.pickerStyle.columnSpacing > 0) {
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if (component % 2 == 1) {
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label.text = @"";
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return label;
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} else {
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component = component / 2;
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}
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}
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if (component < self.dataList.count) {
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NSArray *itemArr = self.dataList[component];
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id item = row < itemArr.count ? itemArr[row] : nil;
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if (item && [item isKindOfClass:[BRTextModel class]]) {
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BRTextModel *model = (BRTextModel *)item;
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label.text = model.text;
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} else {
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label.text = item;
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}
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}
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}
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return label;
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}
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// 获取选择器是否滚动中状态
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- (BOOL)getRollingStatus:(UIView *)view {
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if ([view isKindOfClass:[UIScrollView class]]) {
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UIScrollView *scrollView = (UIScrollView *)view;
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if (scrollView.dragging || scrollView.decelerating) {
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// 如果 UIPickerView 正在拖拽或正在减速，返回YES
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return YES;
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}
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}
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for (UIView *subView in view.subviews) {
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if ([self getRollingStatus:subView]) {
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return YES;
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}
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}
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return NO;
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}
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// 选择器是否正在滚动
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- (BOOL)isRolling {
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return [self getRollingStatus:self.pickerView];
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}
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// 4.滚动 pickerView 执行的回调方法
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- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
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switch (self.pickerMode) {
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case BRTextPickerComponentSingle:
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{
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self.selectIndex = row;
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if (!_isSyncingRollingSelection) {
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// 滚动选择时执行 singleChangeBlock
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self.singleChangeBlock ? self.singleChangeBlock([self getSingleSelectModel], self.selectIndex): nil;
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}
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}
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break;
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case BRTextPickerComponentMulti:
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{
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// 处理选择器有设置列间距时，选择器的滚动问题
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if (self.pickerStyle.columnSpacing > 0) {
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if (component % 2 == 1) {
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return;
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} else {
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component = component / 2;
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}
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}
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NSMutableArray *mutableArr = [NSMutableArray arrayWithArray:self.selectIndexs ?: @[]];
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while (mutableArr.count <= component) {
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[mutableArr addObject:@(0)];
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}
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[mutableArr replaceObjectAtIndex:component withObject:@(row)];
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self.selectIndexs = [mutableArr copy];
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if (!_isSyncingRollingSelection) {
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// 滚动选择时执行 multiChangeBlock
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self.multiChangeBlock ? self.multiChangeBlock([self getMultiSelectModels], self.selectIndexs): nil;
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}
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}
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break;
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case BRTextPickerComponentCascade:
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{
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// 处理选择器有设置列间距时，选择器的滚动问题
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if (self.pickerStyle.columnSpacing > 0) {
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if (component % 2 == 1) {
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return;
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} else {
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component = component / 2;
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}
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}
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if (component < self.selectIndexs.count) {
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NSMutableArray *selectIndexs = [[NSMutableArray alloc]init];
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for (NSInteger i = 0; i < self.selectIndexs.count; i++) {
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if (i < component) {
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[selectIndexs addObject:self.selectIndexs[i]];
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} else if (i == component) {
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[selectIndexs addObject:@(row)];
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} else {
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[selectIndexs addObject:@(0)];
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}
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}
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self.selectIndexs = [selectIndexs copy];
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}
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if (!_isSyncingRollingSelection) {
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// 刷新选择器数据
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[self reloadData];
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// 滚动选择时执行 multiChangeBlock
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self.multiChangeBlock ? self.multiChangeBlock([self getMultiSelectModels], self.selectIndexs): nil;
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}
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}
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break;
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default:
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break;
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}
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}
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#pragma mark - 获取【单列】选择器选择的值
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- (BRTextModel *)getSingleSelectModel {
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id item = self.selectIndex < self.dataList.count ? self.dataList[self.selectIndex] : nil;
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if ([item isKindOfClass:[BRTextModel class]]) {
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BRTextModel *model = (BRTextModel *)item;
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model.index = self.selectIndex;
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return model;
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} else {
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BRTextModel *model = [[BRTextModel alloc]init];
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model.index = self.selectIndex;
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model.text = item;
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return model;
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}
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}
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#pragma mark - 获取【多列】选择器选择的值
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- (NSArray *)getMultiSelectModels {
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NSMutableArray *modelArr = [[NSMutableArray alloc]init];
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for (NSInteger i = 0; i < self.dataList.count; i++) {
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NSInteger index = i < self.selectIndexs.count ? [self.selectIndexs[i] integerValue] : 0;
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NSArray *dataArr = i < self.dataList.count ? self.dataList[i] : @[];
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id item = index >= 0 && index < dataArr.count ? dataArr[index] : nil;
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if ([item isKindOfClass:[BRTextModel class]]) {
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BRTextModel *model = (BRTextModel *)item;
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model.index = index;
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[modelArr addObject:model];
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} else {
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BRTextModel *model = [[BRTextModel alloc]init];
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model.index = index;
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model.text = item;
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[modelArr addObject:model];
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}
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}
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return [modelArr copy];
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}
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// 设置行高
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- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component {
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return self.pickerStyle.rowHeight;
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}
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// 设置列宽
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- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
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if (self.pickerStyle.columnSpacing > 0 && component % 2 == 1) {
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return self.pickerStyle.columnSpacing;
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}
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NSInteger columnCount = [self numberOfComponentsInPickerView:pickerView];
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CGFloat columnWidth = self.pickerView.bounds.size.width / columnCount - 5;
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if (self.pickerStyle.columnWidth > 0 && self.pickerStyle.columnWidth <= columnWidth) {
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return self.pickerStyle.columnWidth;
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}
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return columnWidth;
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}
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#pragma mark - 重写父类方法
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- (void)reloadData {
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// 1.处理数据源
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[self handlerPickerData];
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// 2.刷新选择器
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[self.pickerView reloadAllComponents];
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// 3.滚动到选择的值
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if (self.pickerMode == BRTextPickerComponentSingle) {
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if (self.selectIndex >= 0 && self.selectIndex < self.dataList.count) {
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[self.pickerView selectRow:self.selectIndex inComponent:0 animated:self.selectRowAnimated];
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}
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} else if (self.pickerMode == BRTextPickerComponentMulti || self.pickerMode == BRTextPickerComponentCascade) {
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for (NSInteger i = 0; i < self.selectIndexs.count; i++) {
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NSInteger component = self.pickerStyle.columnSpacing > 0 ? i * 2 : i;
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NSInteger row = i < self.selectIndexs.count ? [self.selectIndexs[i] integerValue] : 0;
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[self.pickerView selectRow:row inComponent:component animated:self.selectRowAnimated];
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}
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}
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}
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- (void)addPickerToView:(UIView *)view {
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// 1.添加选择器
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if (view) {
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// 立即刷新容器视图 view 的布局（防止 view 使用自动布局时，选择器视图无法正常显示）
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[view setNeedsLayout];
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[view layoutIfNeeded];
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self.frame = view.bounds;
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CGFloat pickerHeaderViewHeight = self.pickerHeaderView ? self.pickerHeaderView.bounds.size.height : 0;
|
||
CGFloat pickerFooterViewHeight = self.pickerFooterView ? self.pickerFooterView.bounds.size.height : 0;
|
||
self.pickerView.frame = CGRectMake(0, pickerHeaderViewHeight, view.bounds.size.width, view.bounds.size.height - pickerHeaderViewHeight - pickerFooterViewHeight);
|
||
[self addSubview:self.pickerView];
|
||
} else {
|
||
// iOS16：重新设置 pickerView 高度（解决懒加载设置frame不生效问题）
|
||
CGFloat pickerHeaderViewHeight = self.pickerHeaderView ? self.pickerHeaderView.bounds.size.height : 0;
|
||
self.pickerView.frame = CGRectMake(0, self.pickerStyle.titleBarHeight + pickerHeaderViewHeight, self.keyView.bounds.size.width, self.pickerStyle.pickerHeight);
|
||
|
||
[self.alertView addSubview:self.pickerView];
|
||
}
|
||
|
||
// ③添加中间选择行的两条分割线
|
||
if (self.pickerStyle.clearPickerNewStyle) {
|
||
[self.pickerStyle addSeparatorLineView:self.pickerView];
|
||
}
|
||
|
||
// 2.绑定数据
|
||
[self reloadData];
|
||
|
||
__weak typeof(self) weakSelf = self;
|
||
// 点击确定按钮的回调：点击确定按钮后，执行这个block回调
|
||
self.doneBlock = ^{
|
||
if (!weakSelf) {
|
||
return;
|
||
}
|
||
if (weakSelf.isRolling) {
|
||
[weakSelf handleAutoSelectRollingRow];
|
||
}
|
||
|
||
// 点击确定，执行选择结果回调
|
||
if (weakSelf.pickerMode == BRTextPickerComponentSingle) {
|
||
weakSelf.singleResultBlock ? weakSelf.singleResultBlock([weakSelf getSingleSelectModel], weakSelf.selectIndex): nil;
|
||
} else if (weakSelf.pickerMode == BRTextPickerComponentMulti || weakSelf.pickerMode == BRTextPickerComponentCascade) {
|
||
weakSelf.multiResultBlock ? weakSelf.multiResultBlock([weakSelf getMultiSelectModels], weakSelf.selectIndexs): nil;
|
||
}
|
||
};
|
||
|
||
[super addPickerToView:view];
|
||
}
|
||
|
||
#pragma mark - 获取指定列当前选中行（边界修正）
|
||
- (NSInteger)clampedSelectedRowInComponent:(NSInteger)component {
|
||
NSInteger maxRow = [_pickerView numberOfRowsInComponent:component] - 1;
|
||
if (maxRow < 0) {
|
||
return NSNotFound;
|
||
}
|
||
NSInteger row = [_pickerView selectedRowInComponent:component];
|
||
return MAX(0, MIN(row, maxRow));
|
||
}
|
||
|
||
#pragma mark - 处理滚动未结束前自动选择行
|
||
- (void)handleAutoSelectRollingRow {
|
||
if (!_pickerView) {
|
||
return;
|
||
}
|
||
NSInteger componentCount = [_pickerView numberOfComponents];
|
||
if (componentCount <= 0) {
|
||
return;
|
||
}
|
||
|
||
if (self.pickerMode == BRTextPickerComponentCascade) {
|
||
NSInteger changedIndex = NSNotFound;
|
||
NSInteger changedRow = NSNotFound;
|
||
for (NSInteger component = 0; component < componentCount; component++) {
|
||
if (self.pickerStyle.columnSpacing > 0 && component % 2 == 1) {
|
||
continue;
|
||
}
|
||
NSInteger dataComponent = self.pickerStyle.columnSpacing > 0 ? component / 2 : component;
|
||
NSInteger row = [self clampedSelectedRowInComponent:component];
|
||
if (row == NSNotFound) {
|
||
continue;
|
||
}
|
||
NSInteger oldRow = dataComponent < self.selectIndexs.count ? [self.selectIndexs[dataComponent] integerValue] : 0;
|
||
if (row != oldRow) {
|
||
changedIndex = dataComponent;
|
||
changedRow = row;
|
||
break;
|
||
}
|
||
}
|
||
if (changedIndex != NSNotFound) {
|
||
NSMutableArray<NSNumber *> *selectIndexs = [NSMutableArray array];
|
||
for (NSInteger index = 0; index < self.selectIndexs.count; index++) {
|
||
if (index < changedIndex) {
|
||
[selectIndexs addObject:self.selectIndexs[index]];
|
||
} else if (index == changedIndex) {
|
||
[selectIndexs addObject:@(changedRow)];
|
||
} else {
|
||
[selectIndexs addObject:@(0)];
|
||
}
|
||
}
|
||
self.selectIndexs = [selectIndexs copy];
|
||
[self reloadData];
|
||
}
|
||
return;
|
||
}
|
||
|
||
_isSyncingRollingSelection = YES;
|
||
if (self.pickerMode == BRTextPickerComponentSingle) {
|
||
NSInteger row = [self clampedSelectedRowInComponent:0];
|
||
if (row != NSNotFound) {
|
||
[self pickerView:_pickerView didSelectRow:row inComponent:0];
|
||
}
|
||
} else {
|
||
for (NSInteger component = 0; component < componentCount; component++) {
|
||
NSInteger row = [self clampedSelectedRowInComponent:component];
|
||
if (row == NSNotFound) {
|
||
continue;
|
||
}
|
||
[self pickerView:_pickerView didSelectRow:row inComponent:component];
|
||
}
|
||
}
|
||
_isSyncingRollingSelection = NO;
|
||
}
|
||
|
||
#pragma mark - 重写父类方法
|
||
- (void)addSubViewToPicker:(UIView *)customView {
|
||
[self.pickerView addSubview:customView];
|
||
}
|
||
|
||
#pragma mark - 弹出选择器视图
|
||
- (void)show {
|
||
[self addPickerToView:nil];
|
||
}
|
||
|
||
#pragma mark - 关闭选择器视图
|
||
- (void)dismiss {
|
||
[self removePickerFromView:nil];
|
||
}
|
||
|
||
#pragma mark - setter 方法
|
||
- (void)setFileName:(NSString *)fileName {
|
||
NSString *filePath = [[NSBundle mainBundle] pathForResource:fileName ofType:nil];
|
||
if (filePath && filePath.length > 0) {
|
||
if ([fileName hasSuffix:@".plist"]) {
|
||
// 获取本地 plist文件 数据源
|
||
NSArray *dataArr = [[NSArray alloc] initWithContentsOfFile:filePath];
|
||
if (dataArr && dataArr.count > 0) {
|
||
self.dataSourceArr = dataArr;
|
||
}
|
||
} else if ([fileName hasSuffix:@".json"]) {
|
||
// 获取本地 JSON文件 数据源
|
||
NSData *jsonData = [NSData dataWithContentsOfFile:filePath];
|
||
NSArray *dataArr = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];
|
||
if (dataArr && dataArr.count > 0) {
|
||
self.dataSourceArr = [NSArray br_modelArrayWithJson:dataArr mapper:nil];
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
@end
|