iOS:Uibutton出现，但在Uiview上不起作用

Question

上面有一些类似的问题，但它们在OBJ-C中，并且没有专门回答我的问题。

我正在构建一个带有卡片上按钮的类似火种的约会应用程序，该应用程序允许当前用户查看显示卡上用户的更多信息。我已经以编程方式编写了此按钮(MoreInfobutton(，并在卡(Uiview(上显示它没有问题。但是，当我单击按钮时，它不起作用。我尝试了类似的和iSuserInteractionEnabled，但两项都没有起作用。这是我的代码：

import UIKit
import SDWebImage
class CardView: UIView {
var imageView = UIImageView(image: #imageLiteral(resourceName: "lady5c"))
var informationLabel = UILabel()
var images: [String]?
var userId: String?
var stackView: UIStackView?
let moreInfoButton: UIButton = {
    let button = UIButton(type: .system)
    button.setImage(#imageLiteral(resourceName: "info_icon").withRenderingMode(.alwaysOriginal), for: .normal)
    return button
}()
override init(frame: CGRect) {
    super.init(frame: frame)
    layer.cornerRadius = 15
    clipsToBounds = true
    imageView.contentMode = .scaleAspectFill
    addSubview(imageView)
    imageView.fillSuperview()
    addSubview(informationLabel)
    informationLabel.numberOfLines = 0
    informationLabel.anchor(top: nil, leading: leadingAnchor, bottom: bottomAnchor, trailing: trailingAnchor, padding: .init(top: 0, left: 16, bottom: 16, right: 16))
    informationLabel.text = ""
    informationLabel.textColor = .white
    informationLabel.layer.zPosition = 1
    addSubview(moreInfoButton)
    moreInfoButton.anchor(top: nil, leading: nil, bottom: bottomAnchor, trailing: trailingAnchor, padding: .init(top: 0, left: 0, bottom: 20, right: 20), size: .init(width: 50, height: 50))
    moreInfoButton.layer.zPosition = 1
    moreInfoButton.isUserInteractionEnabled = true
    // let panGesture = UIPanGestureRecognizer(target: self, action: #selector(handlePan))
    // addGestureRecognizer(panGesture)
    addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTap)))
}

Answer 1

如果以编程方式添加一个按钮，我认为您应该使用addArget而不是使用整个Uiview手势。这使按钮具有功能性，而无需与视图手势有任何关系。

lazy var button: UIButton = {
    let temp = UIButton(type: .system)
    temp.isUserInteractionEnabled = true
    temp.addTarget(self, action: someFunction, for: UIControl.Event.touchUpInside)
    return temp
}()

Answer 2

我认为uitapgesturerecognizer与按钮点击事件发生冲突。您可以尝试使用Override TouchEsbegan事件而不是Tap手势。

Answer 3

禁用手势的 cancelsTouchesInView属性。默认情况下，我认为它设置为true。这意味着手势会消耗触摸事件，并且不会传递到按钮

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
tapGesture.cancelsTouchesInView = false
addGestureRecognizer(tapGesture)

Answer 4

更新：由于按钮位于可敲击视图的顶部，请确保按钮显示在Tappable视图的前面。如果您使用的是故事板，则该按钮应列在可敲击的视图下方。

另外，在您的触摸began方法中，请确保您不响应按钮内的触摸：

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first
    if touch?.view != button && touch?.view == tappableView {
        // Next picture
    }
}

如果仍然不起作用，请尝试此实现Touchesbegan：

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first
    if touch?.view == button {
        // performSegue or call button's target function
    } else if touch?.view == tappableView {
        // Next picture
    }
}

---

您缺少按钮的目标：

moreInfoButton.addTarget(self, action: #selector(buttonTapped(_:)), forControlEvents: .TouchUpInside)

和一个函数来处理水龙头：

@objc func buttonTapped(sender: UIButton!) {
    // action
}