Question

I am trying this code on UIScrollView but it’s not working. The NSLog is not appearing on my console. What’s wrong? its working fine when its not on UIScrollView.

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self papers];

    UIGestureRecognizer *recognizer = [[ UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
    longPressGR = (UILongPressGestureRecognizer *)recognizer;
    longPressGR.minimumPressDuration = 0.5;
    [Image1 addGestureRecognizer:longPressGR];
}

-(void) handleLongPress:(UILongPressGestureRecognizer *)recognizer  { 

    NSLog(@"Long Press");
}

Answer 1

You didn’t say what Image1 is. I’m guessing a UIImageView, in which case you need to make sure you do:

[Image1 setUserInteractionEnabled:YES];

(Unlike most views, UIImageView has interaction disabled by default.)

(As an aside, it’s conventional in Objective-C to have your ivars and methods begin with lower-case letters; classes begin with upper-case.)