Anyone have code to substitute for UILongPressGestureRecognizer?

Question

I'd like to support pre 3.2 and this is the only symbol that doesn't want to cooperate, anyone know of some touchesmoved code or something i can use in lieu of the UILongPressGestureRecognizer?

Thanks,

Nick

Answer 1

As you know, you should use touchesBegan, Moved, Ended, and Canceled functions for pre 3.2 iOS. I think implementing only touchesMoved is bad because if the user presses and doesn't move at all until releasing, then touchesMoved won't get called ever.

Instead, I used NSTimer to acheive a long press touch event. This might not be an optimal solution, but it worked well for my app. Here's a snippet of code.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    isAvailable = NO;
    timer = [NSTimer scheduledTimerWithTimeInterval:DURATION target:self selector:@selector(didPassTime:) userInfo:nil repeats:NO];
}

- (void)didPassTime:(id)sender{
    isAvailable = YES;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    if(isAvailable == YES){
        // still pressing after 0.5 seconds 
    }
    else{
        // still pressing before 0.5 seconds
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    if(isAvailable == YES){
        // releasing a finger after 0.5 seconds
    }
    else {
        // releasing a finger before 0.5 seconds
            [timer invalidate];
            timer = nil;
    }



}