87 lines
3.2 KiB
Mathematica
87 lines
3.2 KiB
Mathematica
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// The MIT License (MIT)
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//
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// Copyright (c) 2015-2016 forkingdog ( https://github.com/forkingdog )
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#import "UITableView+FDKeyedHeightCache.h"
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#import <objc/runtime.h>
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@interface FDKeyedHeightCache ()
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@property (nonatomic, strong) NSMutableDictionary<id<NSCopying>, NSNumber *> *mutableHeightsByKeyForPortrait;
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@property (nonatomic, strong) NSMutableDictionary<id<NSCopying>, NSNumber *> *mutableHeightsByKeyForLandscape;
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@end
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@implementation FDKeyedHeightCache
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- (instancetype)init {
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self = [super init];
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if (self) {
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_mutableHeightsByKeyForPortrait = [NSMutableDictionary dictionary];
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_mutableHeightsByKeyForLandscape = [NSMutableDictionary dictionary];
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}
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return self;
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}
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- (NSMutableDictionary<id<NSCopying>, NSNumber *> *)mutableHeightsByKeyForCurrentOrientation {
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return UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation) ? self.mutableHeightsByKeyForPortrait: self.mutableHeightsByKeyForLandscape;
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}
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- (BOOL)existsHeightForKey:(id<NSCopying>)key {
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NSNumber *number = self.mutableHeightsByKeyForCurrentOrientation[key];
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return number && ![number isEqualToNumber:@-1];
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}
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- (void)cacheHeight:(CGFloat)height byKey:(id<NSCopying>)key {
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self.mutableHeightsByKeyForCurrentOrientation[key] = @(height);
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}
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- (CGFloat)heightForKey:(id<NSCopying>)key {
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#if CGFLOAT_IS_DOUBLE
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return [self.mutableHeightsByKeyForCurrentOrientation[key] doubleValue];
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#else
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return [self.mutableHeightsByKeyForCurrentOrientation[key] floatValue];
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#endif
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}
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- (void)invalidateHeightForKey:(id<NSCopying>)key {
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[self.mutableHeightsByKeyForPortrait removeObjectForKey:key];
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[self.mutableHeightsByKeyForLandscape removeObjectForKey:key];
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}
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- (void)invalidateAllHeightCache {
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[self.mutableHeightsByKeyForPortrait removeAllObjects];
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[self.mutableHeightsByKeyForLandscape removeAllObjects];
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}
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@end
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@implementation UITableView (FDKeyedHeightCache)
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- (FDKeyedHeightCache *)fd_keyedHeightCache {
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FDKeyedHeightCache *cache = objc_getAssociatedObject(self, _cmd);
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if (!cache) {
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cache = [FDKeyedHeightCache new];
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objc_setAssociatedObject(self, _cmd, cache, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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return cache;
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}
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@end
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