ios - 当按钮具有动画和渐变蒙版时，点击手势不起作用

我想为按钮标题添加渐变，并且按钮也应该具有闪烁/闪烁之类的动画。通过添加此项，点击手势不起作用

我创建了一个名为“ maskingView”的视图，并使用情节提要在该视图内名为“ btnGradient”的按钮

    let gradient = CAGradientLayer()
    gradient.colors = [UIColor.red.cgColor, UIColor.blue.cgColor]
    gradient.startPoint = CGPoint(x: 0.0, y: 0.5)
    gradient.endPoint = CGPoint(x: 1.0, y: 0.5)
    gradient.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 30)
    maskingView = btnGradient

    // function for animation
    blinkAnimation()

    let tap = UITapGestureRecognizer(target: self, action: #selector(self.goToOtherView(gesture:)))
    tap.delegate = self
    tap.numberOfTapsRequired = 1
    self. maskingView.isUserInteractionEnabled = true
    self. maskingView.addGestureRecognizer(tap)
    maskingView.layer.insertSublayer(gradient, at: 0)


    func blinkAnimation(){
    maskingView.alpha = 1.0
    UIView.animate(withDuration: 0.5, delay: 0.0, options: [.repeat, .autoreverse, .allowUserInteraction], animations: {
        self.maskingView.alpha = 0.0
    }, completion: nil)
    }

最佳答案

由于您正在设置self.maskingView.alpha = 0.0，因此无法正常工作。如果将alpha设置为0，则系统会将其视为隐藏视图！尝试通过设置类似Alpha的方式

self.maskingView.alpha = 0.1

样例代码：

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var maskingView: UIView!
    override func viewDidLoad() {
        super.viewDidLoad()

        let gradient = CAGradientLayer()
        gradient.colors = [UIColor.red.cgColor, UIColor.blue.cgColor]
        gradient.startPoint = CGPoint(x: 0.0, y: 0.5)
        gradient.endPoint = CGPoint(x: 1.0, y: 0.5)
        gradient.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 30)

        // function for animation
        blinkAnimation()

        let tap = UITapGestureRecognizer(target: self, action: #selector(self.goToOtherView(gesture:)))
        tap.numberOfTapsRequired = 1
        self.maskingView.isUserInteractionEnabled = true
        self.maskingView.addGestureRecognizer(tap)
        maskingView.layer.insertSublayer(gradient, at: 0)

        // Do any additional setup after loading the view.
    }

    func blinkAnimation(){
        maskingView.alpha = 1.0
        UIView.animate(withDuration: 0.5, delay: 0.0, options: [.repeat, .autoreverse, .allowUserInteraction], animations: {
            self.maskingView.alpha = 0.1
        }, completion: nil)
    }

    @objc func goToOtherView(gesture:Any) {
        print("tap")
    }
}

关于ios - 当按钮具有动画和渐变蒙版时，点击手势不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59817398/