Warnings for calling UIPanGestureRecognizer touchesBegan from subclass

In a custom subclass of UIPanGestureRecognizer, when I override touchesBegan with:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [[self view].superview brin开发者_开发百科gSubviewToFront:[self view]];
    [super touchesBegan:touches withEvent:event];
}

The super line gets the warnings:

....warning: 'UIPanGestureRecognizer' may not respond to '-touchesBegan:withEvent:'
... Semantic Issue: 'UIPanGestureRecognizer' may not respond to 'touchesBegan:withEvent:'

Why is this?

The initial attempt at fixing this was by importing 'UIGestureRecognizerSubclass.h' as per the UIGestureRecognizer docs for subclasses of UIGestureRecognizer, but I get a 'No such file or directory' error when I try that.

I've got UIKit.framework included, and tried adding

#import <UIKit/UIKit.h>

but it doesn't work either.

Did I forget something?

This is what you need :

#import <UIKit/UIGestureRecognizerSubclass.h>

Also, here is a guide about event progamming in iOS, which contains instructions in order to write a gesture recognizer subclass.

I think you should explicitly import that file:

 #import <UIKit/UIGestureRecognizerSubclass.h>

From UIGestureRecognizer Reference:

You may create a subclass that UIGestureRecognizer that recognizes a distinctive gesture—for example, a “check mark” gesture. If you are going to create such a concrete gesture recognizer, be sure to import the UIGestureRecognizerSubclass.h header file. This header declares all the methods and properties a subclass must either override, call, or reset.