ios - 快速翻转 View : issues with whole screen flipping + tap gesture only works twice

Question

我想创建一个简单的翻转效果，但我不明白我这里遇到的问题:

• 整个屏幕都在翻转，不仅仅是 View ，有没有办法只翻转100,100平方？

• 我只能翻转两次，然后水龙头就不能用了，你知道为什么吗？

  import UIKit
  class ViewController: UIViewController {
  
  var fromOneToTwo : Bool = true
  var view1 : UIImageView!
  var view2 : UIImageView!
  var tap : UITapGestureRecognizer!
  
  func handleTap(tap: UITapGestureRecognizer){
  
      println("1/fromOneToTwo \(fromOneToTwo)")
      var v1 = (fromOneToTwo ? self.view1 : self.view2)
      var v2 = (fromOneToTwo ? self.view2 : self.view1)
  
      UIView.transitionFromView(v1, toView: v2, duration: 0.5, options: (UIViewAnimationOptions.TransitionFlipFromLeft | UIViewAnimationOptions.CurveEaseInOut) ) { finished in
  
          self.fromOneToTwo = !self.fromOneToTwo
          println("2/fromOneToTwo \(self.fromOneToTwo) ")
      }
  }
  
  func createView( str:String)->UIImageView!{
      var img = UIImage(named: str)!
      var imgView = UIImageView(frame: CGRectMake(0,0, 200, 200))
      imgView.image = img
      imgView.sizeToFit()
      imgView.userInteractionEnabled = true
      imgView.addGestureRecognizer(tap)
      return imgView
  }
  
  required init(coder aDecoder:NSCoder){
      super.init(coder:aDecoder)
  
      tap = UITapGestureRecognizer(target: self, action: "handleTap:")
      view1 = createView("imageOnee.png")
      view2 = createView("imageTwo.png")
  }
  
  override func viewDidLoad() {
      super.viewDidLoad()
  
      view.addSubview(view1)
      view.addSubview(view2)
  
      view.backgroundColor = UIColor.redColor()
  }
  
  override func didReceiveMemoryWarning() {
      super.didReceiveMemoryWarning()
  }
  

此外，当我尝试将整个代码添加到自定义 UIView 中，并将自定义实例 myView 添加到 ViewController 时，点击根本不起作用。

Answer 1

我为 view1 和 view2 创建了一个 container View 。然后将点击识别器添加到此容器 View 。

class ViewController: UIViewController {

    var fromOneToTwo : Bool = true
    var view1 : UIImageView!
    var view2 : UIImageView!
    var container : UIView!
    var tap : UITapGestureRecognizer!

    func handleTap(tap: UITapGestureRecognizer){

        println("1/fromOneToTwo \(fromOneToTwo)")
        var v1 = (fromOneToTwo ? self.view1 : self.view2)
        var v2 = (fromOneToTwo ? self.view2 : self.view1)

        UIView.transitionFromView(v1, toView: v2, duration: 0.5, options: .TransitionFlipFromLeft | .CurveEaseInOut ) { finished in

            self.fromOneToTwo = !self.fromOneToTwo
            println("2/fromOneToTwo \(self.fromOneToTwo) ")
        }
    }

    func createView( str:String)->UIImageView!{
        var img = UIImage(named: str)!
        var imgView = UIImageView(frame: CGRectMake(0, 0, 200, 200))
        imgView.image = img
        imgView.sizeToFit()
        return imgView
    }

    required init(coder aDecoder:NSCoder){
        super.init(coder:aDecoder)

        tap = UITapGestureRecognizer(target: self, action: "handleTap:")
        view1 = createView("imageOnee.png")
        container = UIView(frame: CGRectMake(0, 0, view1.bounds.width, view1.bounds.height))
        container.userInteractionEnabled = true

        container.addGestureRecognizer(tap)
        container.addSubview(view1)
        view2 = createView("imageTwo.png")
        container.addSubview(view2)
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        view.addSubview(container)

        view.backgroundColor = UIColor.redColor()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}