Question

I am trying to make a UIImageView move when I tap a button. I have set a UIIAction to start an NSTimer. When tap the button, the character(UIImageView) moves fine. When I tap the same button again, the character speeds up and so forth so eventually he is moving a billion mph. How do I solve this? Here is the code:

-(void)animateCharRight:(NSTimer *)theTimer 
{

    float speed;

    if (speed > 10.0f) 
    {

        speed = 10.0f;

    } 
    else 
    {

        speed = 10.0f;

    }

    CGRect rect = [character frame];
    rect.origin.x += speed;
    [character setFrame:rect];
}

Also, when you press the opposite button after you already pressed one it bugs up because there is no cancelation of the other timer. How do I do that?

How do I access the key up event? I cant seem to find it.

Answer 1

Sounds like you might be starting a new timer on each button tap. So after 2 taps you now have 2 timers, each of which will call -animateCharRight: to move your view 10, for a total of 20. More taps, faster, and so on. Is that what’s going on?