Adding multiple buttons + receiving touchUpInside event inside UICollectionViewCell SWIFT programmatically

问题

I am trying to build a CollectionView for a list all programmatically in Swift without using Storyboard. I was able to add a tap gesture event to the cell.

However, When I added a set of buttons to the UICollectionViewCell's contentView, the buttons do not receive any touch events.

Inside Controller

let sampleCollectionView = UICollectionView(frame: (..), collectionViewLayout: layout)

//Register the UICollectionViewCell inside UICollectionView
sampleCollectionView.registerClass(sampleCollectionViewCell.self, forCellWithReuseIdentifier: "sampleCell")

//Add Tap Gesture event to the cell area
let tap = UITapGestureRecognizer(target: self, action: "handleTapForCell:") 
sampleCollectionView.addGestureRecognizer(tap)

func handleTapForCell(recognizer: UITapGestureRecognizer){
   //I can break in here
}

Inside CollectionViewCell

class sampleCollectionViewCell: UICollectionViewCell
{ 

 override init(frame: CGRect) {
  var buttonBack = UIButton(type: .Custom)
  buttonBack.addTarget(self, action: "actionGoBack:", forControlEvents: UIControlEvents.TouchUpInside)
  ..
  self.contentView.addSubview(buttonBack)
 }

 func actionGoBack(sender: UIButton){
    //I want to get my touch action break in here when I tap right inside the button but it won't
 }         
}

Is CollectionViewCell suited to accept more than one type of tap action (tapping on the whole cell versus multiple buttons inside cell)?

Here is what I tried so far:

Disable Tap Gesture on CollectionView, still not receiving events
Without adding tap events to button, I tried to find the "location" of tap inside the cell, then check if this is in bounds of the button, if so, fire an event. I find this work around to be buggy when I try to add animation or scroll.

Thanks for your suggestions and help.

回答1:

You can set the gesture recognizer to not block the touches in subview

gestureRecognizer.cancelsTouchesInView = false

You can also implement UIGestureRecognizerDelegate and set yourself as delegate. Then you can implement shouldReceiveTouch

optional public func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool

There you can check which view is targeted and return false if you don't want to react to the touch in the cells gesture recognizer.

来源：https://stackoverflow.com/questions/33338842/adding-multiple-buttons-receiving-touchupinside-event-inside-uicollectionviewc

标签

ios

swift

uicollectionview

uicollectionviewcell