如何以编程方式点击UIImageView在iPhone上做点什么？

Question

I have programmatically added a UIImageView. How do I make it send a message to my controller when the users clicks it, sending itself as the only parameter?

Answer 1

I wouldn't use a UIImageView unless there was some other compelling reason. I'd just use a custom UIButton and use the UIImage as its background.

Answer 2

1. Create a new class that extends UIImageView and use that.
2. In your class, override the touch events - touchesBegan, touchesEnded and/or touchesMoved as appropriate
3. From those methods, call back to a method on the controller.

Answer 3

I'd just put a custom button over the UIImage view, and use normally - buttons with Custom style are invisible and so will not obscure the image. It's also a great way to turn regions of text into clickable areas as well.

Or, you could assign the custom image as a graphic background for the button.

Answer 4

just put a button over the imageview, with the Alpha attribute set to 0.10 or less. you can capture the button's tap event but almost cannot see it.