通过更改Alpha Swift iOS启用用户交互 [英] enable user interaction by changing alpha swift iOS

问题描述

我有一个带有点击功能的视图（已启用用户交互）。如果我在不更改alpha的情况下进行设置，则效果很好。但是，如果我尝试延迟更改此视图的Alpha，则在此动画期间无法点击它。有人可以帮忙吗？

I have a view with the tap function (user interaction is enabled). If I set it without changing alpha it works well. But if I try to change alpha of this view with delay, it cannot be tapped during this animation. Could somebody help?

这是我的代码：

import UIKit

class ViewController: UIViewController {

var myView = UIView()
var n = 0

override func viewDidLoad() {
    super.viewDidLoad()

    setView()
    changeAlpha()

}

func changeAlpha() {

        UIView.animate(withDuration: 5) {
            self.myView.alpha = 0.1
        }
    }

func setView() {

    let size = view.frame.width
    myView = UIView(frame: CGRect(x: 0, y: 0, width: size/3, height: size/3))
    myView.center = view.center
    myView.backgroundColor = UIColor.red
    view.addSubview(myView)

    myView.isUserInteractionEnabled = true
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(gameObjectTapped(_:)))
    myView.addGestureRecognizer(tapGestureRecognizer)

}

@objc func gameObjectTapped(_ recognizer:UITapGestureRecognizer) {

    print("# tap \(n)")
    n+=1

}

推荐答案

使用选项 .allowUserInteraction <运行动画/ code>：

Run the animation with option .allowUserInteraction:

UIView.animate(withDuration: 5, delay: 0, options: [.allowUserInteraction], animations: {
    self.myView.alpha = 0.1
}, completion: nil)

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