Tap Gesture没有开火

Question

我正在将FrontViewControllers视图加载到我当前的视图控制器MyVideosViewController中。

我已经向我的MyVideosViewController viewdidload（）添加了2个通知观察者

    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MyVideosViewController.playLatestvideoClick), name: latestKey, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MyVideosViewController.playMostWatchedvideoClick), name: mostKey, object: nil)

在我的FrontViewController

 //MARK: -Gesture Play
func playLatestvideoClick(sender: UITapGestureRecognizer)
{
   print("----- PLAY GESTURE TAPPED ------")
    let imgVw = sender.view as! UIImageView
    api.selectedVideoID = String(imgVw.tag)
    let homeviewcontroller = self.storyboard?.instantiateViewControllerWithIdentifier("MYVIDEO") as? MyVideosViewController

    NSNotificationCenter.defaultCenter().postNotificationName(self.latestKey, object: nil)
}

func playMostWatchedvideoClick(sender: UITapGestureRecognizer)
{
    print("----- PLAY GESTURE TAPPED ------")
    let imgVw = sender.view as! UIImageView
    api.selectedVideoID = String(imgVw.tag)
    let homeviewcontroller = self.storyboard?.instantiateViewControllerWithIdentifier("MYVIDEO") as? MyVideosViewController

    NSNotificationCenter.defaultCenter().postNotificationName(self.mostKey, object: nil)
}

这就是我在FrontViewController中设置采样动作的方法

let tapPlay = UITapGestureRecognizer.init(target: self, action: (#selector(FrontViewController.playLatestvideoClick(_:))))
        self.imgVideo.addGestureRecognizer(tapPlay)
        self.imgVideo.userInteractionEnabled=true

但是当我点击手势时，这些方法中的任何一个都没有触发。这是什么原因？请帮我。

UPDATE

就像这样。如果我重新加载这个MyVideoViewController它第一次工作。然后它不工作

Answer 1

请尝试以下代码：

NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MyVideosViewController.playLatestvideoClick(_:)), name: latestKey, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MyVideosViewController.playMostWatchedvideoClick(_:)), name: mostKey, object: nil)

你需要像这个(_:)一样传递发件人，然后它会调用这个方法。

希望这对你有所帮助。