自定义表格视图单元格上的 UITapGestureRecognizer 不起作用

Question

I'm trying to add a gesture recognizer for an image in a custom table view cell. For some reason I can't seem to make it work though. Here's my code

override func awakeFromNib() {
    super.awakeFromNib()

    heartImage.userInteractionEnabled = true
    let gesture = UITapGestureRecognizer(target: self, action:Selector("onHeartTap"))
    gesture.delegate = self
    heartImage.addGestureRecognizer(gesture)
}

func onHeartTap(sender: UITapGestureRecognizer) 
    print("TAPPED")
}

The function awakeFromNib() gets called correctly, but onHeartTap() never gets called when tapping the image. What am I doing wrong?

Answer 1

User interaction was enabled for the image but not for the cell.

Enabled it for the cell from the storyboard and everything works. Thanks for the help everybody!

Answer 2

In your selector name 'onHeartTap' ":" is missing

just replace

let gesture = UITapGestureRecognizer(target: self, action:Selector("onHeartTap")) 

with

let gesture = UITapGestureRecognizer(target: self, action:Selector("onHeartTap:"))

And also any specific reason you are doing this in awakeFromNib?? You can do this on viewWillAppear also.

Answer 3

I had a similar problem, that a UIImageView in a UITableViewCell subclass would not trigger the gesture recognizer that I set up.

func viewDidLoad() {
    imageView.addGestureRecognizer(UIGestureRecognizer(target: self, action: #selector(imageViewTapped(sender:))))
    imageView.isUserInteractionEnabled = true
}

the problem was the viewDidLoad() is not called for UITableViewCell:
Can I use viewDidLoad method in UITableviewCell?

set the gesture recognizer in awakeFromNib() instead:

override func awakeFromNib() {
    imageView.addGestureRecognizer(UIGestureRecognizer(target: self, action: #selector(imageViewTapped(sender:))))
    imageView.isUserInteractionEnabled = true
}