移动按钮，返回到其第一位置，当触摸结束IOS斯威夫特

Question

我是新来的斯威夫特和工作中，我将我的绿色按钮（显示在图片）的应用移动与手指到左侧，当手指从按钮中移除，然后按钮移动到其之前的位置。还有四个不同的按钮背景图像，在从当前位置到左侧按钮的每次移动之后都会改变。但我无法理解，我是如何做到这一点的。请帮我完成我的任务。

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这里是我的代码

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 


    location = ((touches.first)?.location(in: self.view))! 

    let position = view.convert(location, to: view) 

    print("Touches Began \(location)") 
    } 

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) { 

    location = ((touches.first)?.location(in: self.view))! 

    let position = view.convert(location, to: view) 

    print("touches Moved: \(location)") 
} 

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) { 

    // dont know how i perform 

} 

Answer 1

@IBOutlet weak var yourButtonOutlet: UIButton! 
override func viewDidLoad() { 
    super.viewDidLoad() 
    yourButtonOutlet.addTarget(self, action: #selector(t1),for: .touchUpInside) 
    yourButtonOutlet.addTarget(self, action: #selector(t2),for: .touchDown) 



    // Do any additional setup after loading the view. 
} 
func t1() { 
    print("touch end") 
    yourButtonOutlet.frame = CGRect(x: yourButtonOutlet.frame.origin.x + 50, y: yourButtonOutlet.frame.origin.y, width: yourButtonOutlet.frame.size.width, height: yourButtonOutlet.frame.size.height) 

} 
func t2() { 
    print("touch Start") 
    yourButtonOutlet.frame = CGRect(x: yourButtonOutlet.frame.origin.x - 50, y: yourButtonOutlet.frame.origin.y, width: yourButtonOutlet.frame.size.width, height: yourButtonOutlet.frame.size.height) 

} 

//和上点击按钮改变图像

var selected = true 
@IBAction func btnUserAction(_ sender: UIButton) { 
    if selected == true { 
     sender.setImage(UIImage.init(named: "tick"), for: .normal) 
     selected = false; 
    } 
    else{ 
     sender.setImage(UIImage.init(named: "unTick"), for: .normal) 
     selected = true; 
    } 
}