无效-iOS 6不会停止计时器

Question

I have a timer declared like so:

 @property (nonatomic,strong) NSTimer* tutorialTimer;
 ...
 self.tutorialTimer = [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(showTutorial) userInfo:nil repeats:YES];

when clicking on a button I'm stopping the timer(or at least wish to stop) like so:

[self.tutorialTimer invalidate];
self.tutorialTimer = nil;

the timer keeps invoking...suggestions?

Answer 1

NSTimer should work in main Thread . you can check the process use code

 if ([NSThread isMainThread])
{
   [self.tutorialTimer invalidate];
   self.tutorialTimer = nil;
}

to find out whether if it can step into [self.tutorialTimer invalidate];