Question

I am trying to attach a UITapGestureRecognizer to a webview that i am creating and then remove that view when a user taps the webview. Below is my sample code. What am i doing wrong? Thanks!

- (void) setupPuzzle1
{
puzzleDuration--;
//Create object circle
UIImageView *circleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"red-circle.png"] highlightedImage:[UIImage imageNamed:@"red-circle.png"]];

UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(removeImage:)];
recognizer.numberOfTapsRequired = 1;
recognizer.numberOfTouchesRequired = 1;
recognizer.delegate = self;

[circleView addGestureRecognizer:recognizer];

[recognizer release];

int x = rand()%280;
int y = rand()%420;

circleView.frame = CGRectMake(x,y,40,40);
[self.view addSubview:circleView];

if (puzzleDuration > 0)
{
    [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(setupPuzzle1) userInfo:nil repeats:NO];
}

}



#pragma mark - UITapGestureRecognizer methods


- (void)removeImage:(UITapGestureRecognizer *)recognizer
{
NSLog(@"Remove Image");
[[recognizer view] removeFromSuperview];
}

@end

Answer 1

I think you weren’t talking about UIWebView at all. If you did, your code didn’t reflect that. As such you are dealing with UIImageView and the reason is pretty straightforward as any UIImageView object by default has its userInteractionEnabled set to NO. You should change it to YES. So add this line,

circleView.userInteractionEnabled = YES;

and you aren’t releasing it either. So add

[circleView release]; 

after you add it as a subview.