快速翻转视图：整个屏幕翻转+点击手势的问题只工作两次答案

【问题标题】：flipping view in swift : issues with whole screen flipping + tap gesture only works twice快速翻转视图：整个屏幕翻转+点击手势的问题只工作两次
【发布时间】：2015-01-02 23:09:21
【问题描述】：

我想创建一个简单的翻转效果，但我不明白我在这里遇到的问题：

整个屏幕都在翻转，不只是视图，有没有办法只翻转100100平方？

我只能翻两下，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()
}

}

另外，当我尝试在自定义 UIView 中添加整个代码，并将自定义实例 myView 添加到 ViewController 时，点击根本不起作用。

【问题讨论】：

标签： ios swift uiview uiviewcontroller uitapgesturerecognizer

【解决方案1】：

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

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()
    }
}

【讨论】：