如何以时间间隔动画调用n个子视图

我需要添加到我的视图n个子视图的时间间隔，并设置它们的角半径也与时间间隔。问题是，他们都一起调用自我没有时间间隔（立即）。如何以时间间隔动画调用n个子视图

我试过Timer.sheduledTimer和GCD但我没有结果。也许我做错了什么请讲一些知道该怎么做

func addSubviews(count : Int, completeon : (_ view : UIView)->()) { 
    view.subviews.forEach({ $0.removeFromSuperview() }) 
    for i in 1...count { 
     let inscribedView = UIView() 
     inscribedView.translatesAutoresizingMaskIntoConstraints = false 
     let sizeConstant = ((self.screenWidth/2)/self.viewsCount) 
      self.view.addSubview(inscribedView) 
     //setup constraints 
     self.view.addConstraint(NSLayoutConstraint.init(item: inscribedView, attribute: .top, relatedBy: .equal, toItem: self.view, attribute: .top, multiplier: 1, constant: CGFloat(count == viewsCount ? statusBarHeight + sizeConstant * i : sizeConstant * i))) 
     self.view.addConstraint(NSLayoutConstraint.init(item: inscribedView, attribute: .right, relatedBy: .equal, toItem: self.view, attribute: .right, multiplier: 1, constant: -CGFloat(sizeConstant * i))) 
     self.view.addConstraint(NSLayoutConstraint.init(item: inscribedView, attribute: .bottom, relatedBy: .equal, toItem: self.view, attribute: .bottom, multiplier: 1, constant: -(CGFloat)(count == self.viewsCount ? self.tabBarHeight + sizeConstant * i : sizeConstant * i))) 
     self.view.addConstraint(NSLayoutConstraint.init(item: inscribedView, attribute: .left, relatedBy: .equal, toItem: self.view, attribute: .left, multiplier: 1, constant: CGFloat(sizeConstant * i))) 

     inscribedView.backgroundColor = RandomFlatColor() 
    } 

     completeon(view) 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    self.becomeFirstResponder() 


} 
override func viewWillAppear(_ animated: Bool) { 
    super.viewWillAppear(animated) 
    viewWillLayoutSubviews() 
} 
override func viewWillLayoutSubviews() { 
    addSubviews(count: viewsCount) { view in 
     for subview in view.subviews { 
       subview.addCornerRadiusAnimation(from: 0, to: 20, duration: 0.3) 
     } 
    } 
}

来源

2017-08-22 Daniel Nesterenko

viewWillAppear中后，你为什么打电话viewWillLayoutSubviews？ – Tj3n

我有一个标签栏，我需要我重绘子视图，如果我通过标签 –

你搞乱了VC委托方法，我不认为它是一个好主意，只是用'view.layoutIfNeeded（）'调用你的动画，而不是调用请再次委托方法 – Tj3n

我用在不同的时间了一堆意见动画如下：

let views:[UIView] = [view00,view01, view02] 
    let timing:[Double] = [0.806,0.816,0.826] 
    for (index,view) in views.enumerated() { 
     //set any view properties that will be animated to starting state 
     view.alpha = 0 
     // animate each view 
     UIView.animate(withDuration: 0.28, delay: timing[index], options: .curveEaseOut, animations: {() -> Void in 
     //set the final view properties that are animateable here 
      view.alpha = 1 
     }, completion: {(finished:Bool) -> Void in 
      //can set off a second animation here 
     }) 
    }

来源

2017-08-22 05:09:28 solenoid

它不适合我。我把它写在“for i in 1 ... count”循环中，但是一切仍然是 –

请记住设置一个起始状态，然后在动画块中放置结束状态（我将用对此效果的注释更新答案）约束是可以动画的，iirc，但是他们可能会遇到一些问题。除了创建方法外，您可能需要引用您的视图。 – solenoid

如何以时间间隔动画调用n个子视图

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