touchesBegan not called in UIView subclass

Question

I know there already are some questions about this but I couldn't find a solution. There is a very simple code that works just fine on one of my projects but not on an another one:

Here is the code for subclass of UIView.

import UIKit

class test : UIView {

    init(frame: CGRect, color: UIColor) {
        super.init(frame: frame)
        self.backgroundColor = color
        self.userInteractionEnabled = true
    }

    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
        super.touchesBegan(touches, withEvent: event)
        var alert = UIAlertView()
        alert.title = "lol"
        alert.message = "lol"
        alert.addButtonWithTitle("Ok")
        alert.show()
    }
}

I'm sure the solution is quite simple but I can't find it.

tried using a simple println() in the function to see if it's not a bug with the alertview? — Wraithseeker, May 25 '15 at 17:25
Actually, I used a breakpoint in the function but the app never stopped — La masse, May 25 '15 at 17:26
Is `userInteractionEnabled ` enabled on your view's superviews? — Mick MacCallum, May 25 '15 at 17:27

Mick MacCallum · Accepted Answer · 2015-05-25T17:37:45.920

14

You need to make sure that userInteractionEnabled is enabled on all of the superviews of your view. If any of the superviews have this property set to false, the touch events won't be processed for them or any of their subviews.

edited May 25 '15 at 17:37

answered May 25 '15 at 17:29

Mick MacCallum

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7

Not getting desired result, though I have view->scrollview->view layout,and in both views, I have set userInteractionEnabled to true – Sachin Sharma Aug 10 '17 at 13:39

score 3 · Answer 2 · answered May 25 '15 at 17:30

3

Maybe some of the superviews has the userInteractionEnabled set to "false"?

answered May 25 '15 at 17:30

Pavel Smejkal

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touchesBegan not called in UIView subclass

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