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.

Kenn

What do you mean by "not working"? – Hurrah

I mean that when I touch the view, No AlertView show up – Kenn

tried using a simple println() in the function to see if it's not a bug with the alertview? – Portie

Actually, I used a breakpoint in the function but the app never stopped – Kenn

Is userInteractionEnabled enabled on your view's superviews? – Farmer

Damn, that was so simple. Thank you so much 0x7fffffff♦ ! – Kenn

Answer 1

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.

Farmer

Not getting desired result, though I have view->scrollview->view layout,and in both views, I have set userInteractionEnabled to true – Gotha

Answer 2

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

Judiciary