312 lines
9.8 KiB
Swift
312 lines
9.8 KiB
Swift
//
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// TextInputViewController.swift
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// QuickLocation
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//
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// Created by 八条 on 2026/6/9.
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//
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import UIKit
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import RxSwift
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import RxCocoa
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/// 通用文本输入页面
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/// 用法：
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/// let vc = TextInputViewController(title: "编辑昵称", maxLength: 20) { text in
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/// print("用户输入: \(text)")
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/// }
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/// present(vc, animated: true)
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final class TextInputViewController: UIViewController {
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private let titleText: String
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private let maxLength: Int
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private let confirmAction: ((String) -> Void)?
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private let disposeBag = DisposeBag()
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private let textRelay = BehaviorRelay<String>(value: "")
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// MARK: - Init
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/// - Parameters:
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/// - title: 页面标题
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/// - maxLength: 文字输入上限（0 表示不限制）
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/// - initialText: 初始文本，默认空
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/// - confirmAction: 确定回调
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init(title: String,
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maxLength: Int = 0,
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initialText: String = "",
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confirmAction: ((String) -> Void)? = nil) {
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self.titleText = title
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self.maxLength = maxLength
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self.confirmAction = confirmAction
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self.textRelay.accept(initialText)
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super.init(nibName: nil, bundle: nil)
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modalPresentationStyle = .fullScreen
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modalTransitionStyle = .coverVertical
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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// MARK: - Lifecycle
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override func viewDidLoad() {
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super.viewDidLoad()
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view.backgroundColor = UIColor(hexStr: "#F5FBFB")
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setupUI()
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setupBinding()
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setupKeyboard()
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textView.becomeFirstResponder()
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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if textViewHeightConstraint == nil {
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updateTextViewHeight()
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}
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}
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// MARK: - UI
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private func setupUI() {
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view.addSubview(topBar)
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topBar.addSubview(closeBtn)
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topBar.addSubview(titleLabel)
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view.addSubview(contentView)
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contentView.addSubview(textView)
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textView.addSubview(countLabel)
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contentView.addSubview(confirmBtn)
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// 顶栏
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topBar.layoutChain
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.top()
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.edgesHorzontal()
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.height(kNaviHeight)
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closeBtn.layoutChain
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.bottom(12)
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.left(7)
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.width(24).height(24)
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titleLabel.layoutChain
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.centerY(closeBtn)
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.centerX()
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// 内容容器（textView + 按钮），键盘升起时整体上移
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contentView.layoutChain
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.topToBottomOfView(topBar, offset: 16)
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.edgesHorzontal(15)
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.bottom()
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// 输入框
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textView.layoutChain
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.top()
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.edgesHorzontal()
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.height(textViewMinHeight)
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// 字数统计（textView 右下角）
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countLabel.layoutChain
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.right(-10)
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.bottom(-8)
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// 确定按钮
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confirmBtn.layoutChain
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.topToBottomOfView(textView, offset: 50)
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.edgesHorzontal()
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.height(44)
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.bottom()
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}
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// MARK: - Binding
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private func setupBinding() {
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// 输入流
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textView.rx.text
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.compactMap { $0 }
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.subscribe(onNext: { [weak self] text in
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guard let self = self else { return }
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let realText = self.maxLength > 0 && text.count > self.maxLength
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? String(text.prefix(self.maxLength))
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: text
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if realText != text {
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self.textView.text = realText
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}
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self.textRelay.accept(realText)
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})
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.disposed(by: disposeBag)
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// 字数统计
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textRelay
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.map { [weak self] text in
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guard let self = self, self.maxLength > 0 else { return "" }
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return "\(text.count)/\(self.maxLength)"
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}
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.bind(to: countLabel.rx.text)
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.disposed(by: disposeBag)
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// 确定按钮状态 + 背景色
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let confirmEnabled = textRelay
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.map { [weak self] text in
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guard let self = self else { return false }
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if self.maxLength > 0 { return !text.isEmpty && text.count <= self.maxLength }
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return !text.isEmpty
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}
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.share(replay: 1)
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confirmEnabled
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.bind(to: confirmBtn.rx.isEnabled)
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.disposed(by: disposeBag)
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confirmEnabled
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.subscribe(onNext: { [weak self] enabled in
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self?.confirmBtn.backgroundColor = enabled
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? UIColor(hexStr: "#16B3FF")
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: UIColor(hexStr: "#CCCCCC")
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})
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.disposed(by: disposeBag)
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// 动态高度
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textView.rx.text
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.observe(on: MainScheduler.asyncInstance)
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.subscribe(onNext: { [weak self] _ in
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self?.updateTextViewHeight()
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})
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.disposed(by: disposeBag)
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// 确定
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confirmBtn.rx.tap
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.withLatestFrom(textRelay)
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.subscribe(onNext: { [weak self] text in
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guard let self = self else { return }
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self.confirmAction?(text)
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self.dismiss(animated: true)
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})
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.disposed(by: disposeBag)
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// 关闭
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closeBtn.rx.tap
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.subscribe(onNext: { [weak self] _ in
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self?.dismiss(animated: true)
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})
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.disposed(by: disposeBag)
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}
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// MARK: - Keyboard
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private var originContentY: CGFloat = 0
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private func setupKeyboard() {
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NotificationCenter.default.rx.notification(UIResponder.keyboardWillShowNotification)
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.subscribe(onNext: { [weak self] noti in
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guard let self = self,
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let userInfo = noti.userInfo,
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let frame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
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else { return }
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let keyboardHeight = frame.height
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let duration = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double) ?? 0.25
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// 计算 contentView 需要上移的距离 = 键盘遮住底部的高度 - 安全区域
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let offset = keyboardHeight - kSafeBottomMargin
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UIView.animate(withDuration: duration) {
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self.contentView.transform = CGAffineTransform(translationX: 0, y: -offset)
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self.view.layoutIfNeeded()
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}
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})
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.disposed(by: disposeBag)
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NotificationCenter.default.rx.notification(UIResponder.keyboardWillHideNotification)
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.subscribe(onNext: { [weak self] noti in
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guard let self = self else { return }
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let duration = (noti.userInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double) ?? 0.25
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UIView.animate(withDuration: duration) {
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self.contentView.transform = .identity
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self.view.layoutIfNeeded()
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}
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})
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.disposed(by: disposeBag)
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}
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// MARK: - TextView Height
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private let textViewMinHeight: CGFloat = 150
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private let textViewMaxHeight: CGFloat = 300
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private var textViewHeightConstraint: NSLayoutConstraint?
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private func updateTextViewHeight() {
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let size = textView.sizeThatFits(CGSize(width: textView.bounds.width, height: CGFloat.greatestFiniteMagnitude))
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let height = min(max(size.height, textViewMinHeight), textViewMaxHeight)
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if textViewHeightConstraint == nil {
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textViewHeightConstraint = textView.layoutChain.height(height)
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} else {
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textViewHeightConstraint?.constant = height
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}
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UIView.setAnimationsEnabled(false)
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textView.layoutIfNeeded()
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UIView.setAnimationsEnabled(true)
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}
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// MARK: - Views
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private lazy var contentView: UIView = {
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let v = UIView()
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v.backgroundColor = .clear
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return v
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}()
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private lazy var topBar: UIView = {
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let v = UIView()
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v.backgroundColor = .clear
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return v
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}()
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private lazy var closeBtn: UIButton = {
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let btn = UIButton(type: .custom)
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btn.setImage(UIImage(named: "Common/back"), for: .normal)
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btn.extendEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 30)
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return btn
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}()
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private lazy var titleLabel: UILabel = {
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let label = UILabel()
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label.font = .systemFont(ofSize: 17, weight: .medium)
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label.textColor = UIColor(hexStr: "#333333")
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label.text = titleText
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label.textAlignment = .center
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return label
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}()
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lazy var textView: UITextView = {
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let tv = UITextView()
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tv.font = .systemFont(ofSize: 15)
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tv.textColor = UIColor(hexStr: "#333333")
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tv.backgroundColor = .white
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tv.cornerRadius = 4
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tv.layer.borderWidth = 1
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tv.layer.borderColor = ThemeManager.shared.color.lineColor.cgColor
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tv.textContainerInset = UIEdgeInsets(top: 12, left: 12, bottom: 12, right: 12)
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tv.showsVerticalScrollIndicator = true
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tv.bounces = false
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tv.tintColor = UIColor(hexStr: "#16B3FF")
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return tv
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}()
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private lazy var countLabel: UILabel = {
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let label = UILabel()
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label.font = .systemFont(ofSize: 12)
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label.textColor = UIColor(hexStr: "#BBBBBB")
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label.text = maxLength > 0 ? "0/\(maxLength)" : ""
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return label
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}()
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private lazy var confirmBtn: UIButton = {
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let btn = UIButton(type: .custom)
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btn.setTitle("确定", for: .normal)
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btn.setTitleColor(.white, for: .normal)
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btn.setTitleColor(.white, for: .disabled)
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btn.titleLabel?.font = .systemFont(ofSize: 16, weight: .medium)
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btn.cornerRadius = 22
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btn.isEnabled = false
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return btn
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}()
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}
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