Swift Uiview 背景动画不起作用

Question

我实际上已经完成了当底部表弹出时它从底部到顶部动画并且背景颜色会淡入的一半部分，但是当我想关闭底部表时，它的不同情况，背景动画不这样做褪色出动画，而不是做从上到下的动画，有人知道我为什么会得到这个错误吗？

这是我的代码

let fullView: CGFloat = 0
let screenSize: CGRect = UIScreen.main.bounds

@IBOutlet weak var Text: UILabel!
@IBOutlet weak var topView: UIView!
@IBOutlet weak var vieww: UIView!
@IBOutlet weak var botView: UIView!
@IBOutlet weak var Button: UIButton!

@objc func pressed(sender : Any) {
    
    var closeView = screenSize.height
   
    print(closeView)
    
    UIView.animate(withDuration: 0.4) { [weak self] in
        let frame = self?.view.frame
         self?.view.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
        self?.view.frame = CGRect(x: 0, y: closeView, width: frame!.width, height: frame!.height)
    }
    
    UIView.animate(withDuration: 0.4, delay: 0.35, options: .curveEaseOut, animations: {
        self.topView.alpha = 0.0
    }, completion: nil)
    
    isShown = false

}

override func viewDidLoad() {
    super.viewDidLoad()
    
    button()
   
    self.topView.alpha = 0.0
    
    vieww.layer.cornerRadius = 20
    vieww.layer.borderWidth = 0.5
    vieww.layer.borderColor = UIColor(red:222/255, green:225/255, blue:227/255, alpha: 1).cgColor
    vieww.clipsToBounds = true
    
    botView.layer.masksToBounds = false
    botView.layer.shadowColor = UIColor.black.cgColor
    botView.layer.shadowOpacity = 0.14
    botView.layer.shadowOffset = CGSize(width: 0, height: 0)
    botView.layer.shadowRadius = 2.7
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    
    
    //when the animation is popping up
    
    UIView.animate(withDuration: 0.4) { [weak self] in
        let frame = self?.view.frame
        //            let yComponent = UIScreen.main.bounds.height - 896
        let yComponent = self?.fullView
        self?.view.frame = CGRect(x: 0, y: yComponent!, width: frame!.width, height: frame!.height)
    }
        
        UIView.animate(withDuration: 0.4, delay: 0.35, options: .curveEaseOut, animations: {
            self.topView.alpha = 0.5
        }, completion: nil)

}

func button() {
    
    Button.addTarget(self, action: #selector(pressed), for: .touchUpInside)
}

我仍然不知道为什么会发生这种情况，我猜测它是因为关闭动画和淡出动画不会做任何事情，因为首先调用关闭动画......但它仍然没有任何意义，因为那时我尝试在底部工作表中弹出它的工作，现在我尝试使用相同的方法但它不工作......知道吗？谢谢:)

Answer 1

问题在于您的按下方法 -

您正在通过提供 y=closeView（即屏幕高度的大小）来更改主视图的框架。随着您的整个主视图下降，您的弹出窗口正在发生变化。

topView 也随着主视图向下移动

@objc func pressed(sender : Any) {
  
  let closeView = screenSize.height
 
  print(closeView)
  
  UIView.animate(withDuration: 0.4) { [weak self] in
      let frame = self?.view.frame
       self?.view.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
      self?.view.frame = CGRect(x: 0, y: closeView, width: frame!.width, height: frame!.height) //Wrong
  }


UIView.animate(withDuration: 0.4, delay: 0.35, options: .curveEaseOut, animations: {
      self.topView.alpha = 0.0
  }, completion: nil)
  

}

解决方案 -

self?.<bottomView>.frame = CGRect(x: 0, y: closeView, width: frame!.width, height: frame!.height) //Change bottom view with the bottom subview object which you want to push at bottom

Answer 2

您需要使用完成处理程序来隐藏这样的视图

 UIView.animateKeyframes(withDuration: 0.4, delay: 0.35, options: .curveEaseOut, animations: {
       self.topView.alpha = 0.0
    }) { _ in
      isShown = false
    }