Timer Not Stopping when UIImage gets to a certain point - uiimage

Question

I am developing an app where the menu move away to reveal a second menu. I am moving the image with a NSTimer, and want it to stop when the image hits a certain coordinate on the screen. But what I am currently using is not working, it is moving the image, but it doesn't stop. What am I doing wrong? EDIT: This is Xcode 5
- (IBAction)showSubMenu:(id)sender {
moveTimer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:#selector(moveMenus) userInfo:nil repeats:YES];
[self stopMovement];
}
-(void)stopMovement {
if (mainMenu.center.y < -160) {
[moveTimer invalidate];
moveTimer = nil;
}
}
-(void)moveMenus {
mainMenu.center = (CGPointMake(mainMenu.center.x, mainMenu.center.y-1));
goButton.center = (CGPointMake(goButton.center.x, goButton.center.y-1));
Info.center = (CGPointMake(Info.center.x, Info.center.y-1));
helpButton.center = (CGPointMake(helpButton.center.x, helpButton.center.y-1));
subMenu.center = (CGPointMake(subMenu.center.x, subMenu.center.y-1));
description.center = (CGPointMake(description.center.x, description.center.y-1));
playEndless.center = (CGPointMake(playEndless.center.x, playEndless.center.y-1));
playQuick.center = (CGPointMake(playQuick.center.x, playQuick.center.y-1));
playSoundboard.center = (CGPointMake(playSoundboard.center.x, playSoundboard.center.y-1));
confirm.center = (CGPointMake(confirm.center.x, confirm.center.y-1));
}
Thanks for the help in advance!
Rafee

Answer 1

You need to call stopMovement every time your view move, so change your code like this :
- (IBAction)showSubMenu:(id)sender
{
moveTimer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:#selector(moveMenus) userInfo:nil repeats:YES];
}
- (void)stopMovement
{
if (mainMenu.center.y < -160)
{
[moveTimer invalidate];
moveTimer = nil;
}
}
- (void)moveMenus
{
mainMenu.center = (CGPointMake(mainMenu.center.x, mainMenu.center.y-1));
goButton.center = (CGPointMake(goButton.center.x, goButton.center.y-1));
Info.center = (CGPointMake(Info.center.x, Info.center.y-1));
helpButton.center = (CGPointMake(helpButton.center.x, helpButton.center.y-1));
subMenu.center = (CGPointMake(subMenu.center.x, subMenu.center.y-1));
description.center = (CGPointMake(description.center.x, description.center.y-1));
playEndless.center = (CGPointMake(playEndless.center.x, playEndless.center.y-1));
playQuick.center = (CGPointMake(playQuick.center.x, playQuick.center.y-1));
playSoundboard.center = (CGPointMake(playSoundboard.center.x, playSoundboard.center.y-1));
confirm.center = (CGPointMake(confirm.center.x, confirm.center.y-1));
// Call here
[self stopMovement];
}