Víctor B.
Víctor B.

Reputation: 1680

UITapGestureRecognizer doesn't work added to an UIView?

I'm triyng to make a gesture recognizer for a simple UIView:

UIView *theView = [[UIView alloc] initWithFrame:rect];
[theView setUserInteractionEnabled:YES];

UITapGestureRecognizer *tap = [[[UITapGestureRecognizer alloc] initWithTarget:self 
                                                                       action:@selector(handleTap)] autorelease];
[theView addGestureRecognizer:tap];

If I debug the property gestureRecognizers of the view it shows the gesture recognizer object. But when I tap inside the view it doesn't work.

The same code using an UIImageView works perfect, any ideas why doesn't work in UIView?

UPDATED:

An example class.

@implementation ExampleClass

- (UIView *)getViewInRect:(CGRect)rect
{
    UIView *theView = [[UIView alloc] initWithRect:rect];
    [theView setUserInteractionEnabled:YES];

    UITapGestureRecognizer *tap = [[[UITapGestureRecognizer alloc] 
                                    initWithTarget:self 
                                    action:@selector(handleTap)] 
                                   autorelease];
    [aText addGestureRecognizer:tap];

    return theView;
}

- (UIImageView *)getImageViewInRect:(CGRect)rect
{
    UIImageView *theView = [[UIImageView alloc] initWithRect:rect];
    [theView setUserInteractionEnabled:YES];

    UITapGestureRecognizer *tap = [[[UITapGestureRecognizer alloc] 
                                        initWithTarget:self 
                                                action:@selector(handleTap)] 
                                   autorelease];
    [theView addGestureRecognizer:tap];

    return [theView autorelease];    
}

- (void)handleTap
{
    NSLog(@"Tap Handled!!", nil);
}

@end

UPDATED 2:

Adding UITapGestureRecognizer to all subviews of theView don't fix the problem...

FIX IT!!!

OK!! The problem was the CGRect for theView, it had the width set to 0.0!!!

Upvotes: 5

Views: 10228

Answers (2)

Robert Mao
Robert Mao

Reputation: 1919

Did you try this?

[view setUserInteractionEnabled:YES];

Upvotes: 19

Declare theview as ivar in .h file. Synthesize and then call it like this:

[self.theview setMultipleTouchEnabled:YES];

Don't forget to alloc and init that theview in viewDidLoad method.

That's it.

Upvotes: 2

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