Swift：无法识别点击手势

Question

I am having some trouble getting my tap gesture to work when my code is separated into classes. I had this all contained in one file earlier and it worked smoothly so I assume I did something wrong in the following code:

placeContainerView.userInteractionEnabled = true

let showFullPlaceContainerView = UITapGestureRecognizer(target: self, action: Selector(self.showFullPlaceContainerViewFunction(placeContainerView)))
placeContainerView.addGestureRecognizer(showFullPlaceContainerView)

where the function showFullContainerViewFunction(placeContainerView)

func showFullPlaceContainerViewFunction(placeContainerView: PlaceContainerView) {
    placeContainerView.animateExpandContractContainer()   
}

and

func animateExpandContractContainer() {
    print("Tap gesture working")
    if self.displayingPlaceLabel == false {
        print(self.displayingPlaceLabel)
        self.displayingPlaceLabel = true

        UIView.animateWithDuration(0.4, delay: 0.0, options: [], animations: {
            self.center.x += 180
            }, completion: nil)
    } else {
        self.displayingPlaceLabel = false
        UIView.animateWithDuration(0.4, delay: 0.0, options: [], animations: {
            self.center.x -= 180
            }, completion: nil)
    }

}

Somehow the placeContainerView is not recognising the taps and does not return any print statements when clicked.

Any ideas? Thanks for your help!

Answer 1

查看placeContainerView及其超级视图框架和userInteractionEnable。

Answer 2

Changed Selector syntax as you suggested

let showFullPlaceContainerView = UITapGestureRecognizer(target: self, action: #selector(self.showFullPlaceContainerViewFunction(_:)))
placeContainerView.addGestureRecognizer(showFullPlaceContainerView)

Your method will be like this

func showFullPlaceContainerViewFunction(recognizer: UITapGestureRecognizer) {
    let placeContainerView = recognizer.view as! PlaceContainerView
    placeContainerView.animateExpandContractContainer()   
}

Answer 3

Where is the parameter of the expected function?

placeContainerView.userInteractionEnabled = true
let showFullPlaceContainerView = UITapGestureRecognizer(target: self, action: #selector(YourViewController.yourFunction(_:))
placeContainerView.addGestureRecognizer(showFullPlaceContainerView)

Your expected function should be like this:

func yourFunction(tapGestureRecognizer:UITapGestureRecognizer) {
   // Do something
}