Question

下午好。我正在创建一个简单的小应用程序，并且我有一个简单的“功能”，我无法弄清楚如何实现，这对编程来说是个新手。我有一个UICollectionView，其中一个单元格位于另一个UICollectionView的单元格中，当我点击其中一个单元格时，它们会触发以下didselect和diddeselect方法：

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    if let cell = collectionView.cellForItem(at: indexPath) {

        cell.layer.borderColor = UIColor.flatBlack.cgColor
        cell.layer.borderWidth = 3
        cell.layer.cornerRadius = 7
        cell.backgroundColor = GradientColor(.topToBottom, frame: cell.frame, colors: [UIColor.flatRed.withAlphaComponent(0.2), UIColor.white])


    } else {return}

}

func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {

    if let cell = collectionView.cellForItem(at: indexPath) {
        cell.layer.borderColor = UIColor.clear.cgColor
        cell.layer.borderWidth = 0
        cell.layer.cornerRadius = 0
        cell.backgroundColor = .white
    } else {return}

}

单元格内容：有点长，但是如果有要求，我将发布代码（以编程方式创建的单元格）。但基本上我在每个单元格中都有一些UIImageViews，两个UITextViews，一个UITextLabel和一个UIButton。（因此，单元格是在单独的类中声明的，而不是在UICollectionViewDelegate和DataSource的类中声明的。）

问题：我想添加一个内容，以便当我在单元格中的任意位置点击单个框架时，即使我点击UITextView，我也希望选择它（此刻，当我点击textview时，它会进入该视图的编辑模式）。如果我再次点击它，我希望能够编辑它。 -如何实现呢？

单元格创建代码：

class EventsCell: UICollectionViewCell {
  override init(frame: CGRect) {
    super.init(frame: frame)
    backgroundColor = UIColor.white
    setupViews()


}
//MARK: - Declaration of cell organelles.
//separatorView for a separating line between cells

let textView: GrowingTextView = {   //GrowingTextView is a pod it is a regular UITextView but with some perks.
    let tv = GrowingTextView()
    tv.backgroundColor = .clear
    tv.allowsEditingTextAttributes = true
    tv.isScrollEnabled = false
    tv.font = UIFont(name: "Didot", size: 16)
    tv.textContainerInset = UIEdgeInsetsMake(4, 4, 4, 6)
    tv.placeholder = "Write your event text here"
    tv.placeholderColor = UIColor.lightGray
    tv.autoresizingMask = .flexibleHeight
    tv.isUserInteractionEnabled = false
    return tv
}()



let eventPlaceholderMarkImage: UIImageView = {
    let iv = UIImageView()
    iv.image = UIImage(named: "placeHolderEventTitleMark")
    return iv
}()

func setupViews() {


    addSubview(textView)
    addSubview(eventPlaceholderMarkImage)


    let eventsPinImageH = frame.width / 2 - 7
    let cellHeight = frame.height
    let cellWidth = frame.width

    //MARK: - Constraints for EventsCell

    addConstraintsWithFormat(format: "H:|-16-[v0(\(frame.width - 32))]-16-|", views: textView)
    addConstraintsWithFormat(format: "V:|-47-[v0]-16-|", views: textView)




    addConstraint(NSLayoutConstraint(item: eventPlaceholderMarkImage, attribute: .bottom, relatedBy: .equal, toItem: textView, attribute: .top, multiplier: 1, constant: -5))
    addConstraint(NSLayoutConstraint(item: eventPlaceholderMarkImage, attribute: .height, relatedBy: .equal, toItem: self, attribute: .height, multiplier: 0, constant: 20)) 
    //Followed by much more constraints
    required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}
}

然后在类中创建UICollectionView：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: EventCellID, for: indexPath)

    return cell
}

感谢您阅读我的帖子！

Answer 1

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    if let cell = collectionView.cellForItem(at: indexPath) {

        cell.yourTextView.isUserInteractionEnbled = true //1


        cell.layer.borderColor = UIColor.flatBlack.cgColor
        cell.layer.borderWidth = 3
        cell.layer.cornerRadius = 7
        cell.backgroundColor = GradientColor(.topToBottom, frame: cell.frame, colors: [UIColor.flatRed.withAlphaComponent(0.2), UIColor.white])


    } else {return}

}

func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {

    if let cell = collectionView.cellForItem(at: indexPath) {
        cell.layer.borderColor = UIColor.clear.cgColor
        cell.layer.borderWidth = 0
        cell.layer.cornerRadius = 0
        cell.backgroundColor = .white
    } else {return}

}

override func viewWillAppear(_ animated: Bool) {        
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillDisappear), name: Notification.Name.UIKeyboardWillHide, object: nil)
}


@objc func keyboardWillDisappear() {

    cell.yourTextView.isUserInteractionEnbled = false //2
}

创建单元格时：

...
cell.yourTextView.isUserInteractionEnabled = false // 3

1：第一次选择单元格时，由于我们在步骤（3）中所做的操作，因此无法选择textView，在第一次点击后，我们将为第二次触摸启用textView

2：每当我们在编辑textview后关闭键盘时，我们都将交互设置为false，这样我们就可以选择点击时的单元格而不是textView

Swift：使用didSelectItemAt indexPath函数仅选择单元格，即使我点击其中的UI元素

1 个答案: