将后退按钮原来的位置UIView.Animate

Question

我编程另一个函数创建14个按钮和我添加的目标给他们，让他们每个动画一切，我已经目标时，我按任何按钮去的目标，我的问题如何搬回原来的位置使用UIView.Animate？

正是这样的Gif：

代码：

var tileArrayXAxis: [Int] = [] // X-Axis of the my 14 buttons 
var tileArrayYAxis: [Int] = [] // Y-Axis of the my 14 buttons 
var tileArrayWidth: [Int] = [] // Width of the my 14 buttons 
var tileArrayHeight: [Int] = [] // Heigh of the my 14 buttons 

var targetArrayXAxis: [Int] = [] // X-Axis of the target 
var targetArrayYAxis: [Int] = [] // Y-Axis of the target 
var targetArrayWidth: [Int] = [] // Width of the target 
var targetArrayHeight: [Int] = [] // Heigh of the target 

var i : Int = 0 

func moveButton(sender: UIButton) { 

    var xS = Int() 
    var yS = Int() 
    var widthS = Int() 
    var heightS = Int() 

    if i < targetArrayXAxis.count && i < targetArrayYAxis.count && i < targetArrayWidth.count && i < targetArrayHeight.count { 

     xS = targetArrayXAxis[i] 
     yS = targetArrayYAxis[i] 
     widthS = targetArrayWidth[i] 
     heightS = targetArrayHeight[i] 
     yS -= widthS 

     let startS = CGPoint(x: xS, y: yS) 

     let sizeS = CGSize(width: widthS, height: heightS) 
     sender.frame = CGRect(x: startS.x, y: startS.y, width: sizeS.width, height: sizeS.width) 

    } 

    UIView.animate(withDuration: 2, delay: 0, usingSpringWithDamping: 0.2, initialSpringVelocity: 6, options: .allowUserInteraction, animations: { [weak self] in 

     sender.transform = .identity 
     self?.i += 1   
    }) 
} 

Answer 1

设定您所设定的框架后，新的值不会移动的按钮变换身份因为它只会返回新的帧。

或者：你需要存储的旧框架中的变量，将其设置为一个新值之前：

let oldFrame : CGRect = sender.frame 
// Now set the frame to its new value 
sender.frame = .... 

然后在你的动画块：

sender.frame = oldFrame 

或者：DO不分配一个新的框架，但发送者分配一个平移变换它，然后将转换身份在动画块撤消转换并发送按钮回到它在哪里。

编辑：按照要求，这种简单的ViewController实现如下：

import UIKit 

类的ViewController：UIViewController的{

fileprivate var buttonOne : UIButton! 
fileprivate var buttonTwo : UIButton! 
fileprivate var buttonOneFrame : CGRect { 
    return CGRect(origin: CGPoint(x: view.bounds.width/2 - 200, y: 100), 
    size: CGSize(width: 150, height: 100)) 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 

    buttonOne = { 
     let bO : UIButton = UIButton() 
     bO.backgroundColor = .red 
     bO.setTitle("Frame Method", for: .normal) 
     bO.addTarget(self, action: #selector(frameMethodMove(sender:)), for: .touchUpInside) 
     bO.frame = buttonOneFrame 
     return bO 
    }() 

    buttonTwo = { 
     let bT : UIButton = UIButton() 
     bT.backgroundColor = .blue 
     bT.setTitle("Transform Method", for: .normal) 
     bT.addTarget(self, action: #selector(transformMethodMove(sender:)), for: .touchUpInside) 
     bT.frame = CGRect(origin: CGPoint(x: view.bounds.width/2 + 50, y: 100), 
          size: CGSize(width: 150, height: 100)) 
     return bT 
    }() 

    view.addSubview(buttonOne) 
    view.addSubview(buttonTwo) 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

@objc fileprivate func frameMethodMove(sender: UIButton) -> Void { 

    let newFrame : CGRect = CGRect(origin: CGPoint(x: buttonOneFrame.origin.x, y: buttonOneFrame.origin.y + 500), 
            size: buttonOneFrame.size) 

    sender.frame = newFrame 

    sender.removeTarget(self, action: #selector(frameMethodMove(sender:)), for: .touchUpInside) 
    sender.addTarget(self, action: #selector(frameMethodMoveBack(sender:)), for: .touchUpInside) 
} 

@objc fileprivate func frameMethodMoveBack(sender: UIButton) -> Void { 

    UIView.animate(withDuration: 0.5, delay: 0, options: .allowUserInteraction, animations: { 
     sender.frame = self.buttonOneFrame 
    }, completion: ({ _ in 

     sender.removeTarget(self, action: #selector(self.frameMethodMoveBack(sender:)), for: .touchUpInside) 
     sender.addTarget(self, action: #selector(self.frameMethodMove(sender:)), for: .touchUpInside) 
    })) 

} 

@objc fileprivate func transformMethodMove(sender: UIButton) -> Void { 

    sender.transform = CGAffineTransform.init(translationX: 0, y: 500) 

    sender.removeTarget(self, action: #selector(transformMethodMove(sender:)), for: .touchUpInside) 
    sender.addTarget(self, action: #selector(transformMethodMoveBack(sender:)), for: .touchUpInside) 
} 

@objc fileprivate func transformMethodMoveBack(sender: UIButton) -> Void { 

    UIView.animate(withDuration: 0.5, delay: 0, options: .allowUserInteraction, animations: { 
     sender.transform = .identity 
    }, completion: ({ _ in 
     sender.removeTarget(self, action: #selector(self.transformMethodMoveBack(sender:)), for: .touchUpInside) 
     sender.addTarget(self, action: #selector(self.transformMethodMove(sender:)), for: .touchUpInside) 
    })) 
} 

}