iPhone: Override UIButton buttonWithType to return subclass
- by Amagrammer
I want to be able to create a UIButton with an oversized responsive area. I know that one way to do that is to override the hitTest method in a subclass, but how do I instantiate my custom button object in the first place?
[OversizedButton buttonWithType: UIButtonTypeDetailDisclosure];
doesn't work out of the box because buttonWithType returns a UIButton, not an OversizedButton.
So it seems like I need to override the buttonWithType method as well. Does anyone know how to do this?
@implementation OversizedButton
+ (id)buttonWithType:(UIButtonType)buttonType
{
// Construct and return an OversizedButton rather than a UIButton
// Needs to handle special types such as UIButtonTypeDetailDisclosure
// I NEED TO KNOW HOW TO DO THIS PART
}
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
// Return results if touch event was in oversized region
// I ALREADY KNOW HOW TO DO THIS PART
}
@end
Alternatively, maybe I could create the button using alloc/initWithFrame. But the buttonType property is readonly, so how do you create the custom button types?
Note: I know there are other ways to do this, such as having an invisible button behind the visible one. I don't care for that approach and would prefer to avoid it. Any help on the approach described above would be very helpful. Thanks
