IOS:UIView
lastmod 2018-08-17created 2014-03-199 edits
Touch Event on UIView
A very general way to get touches is to override these methods in a custom UIView subclass:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;
The official docs for these methods is under Responding to Touch Events in the UIResponder class docs (UIView inherits those methods since it's a subclass of UIResponder). Longer and more introductory docs can be found in the Event Handling Guide for iOS.
If you just want to detect a tap (touch-down, then touch-up within your view), it's easiest to add a UIButton as a subview of your view, and add your own custom method as a target/action pair for that button. Custom buttons are invisible by default, so it wouldn't affect the look of your view.
If you're looking for more advanced interactions, it's also good to know about the UIGestureRecognizer class.
UIView Attributes
A summary of the properties used in UIView.
How to disable the UIView
The way to switch a UIView between the Enable and Disable states is shown below.
Change content mode
The content mode can be changed with the code below.