Timer in separate Thread.

Question

Hi.
In my application i have a timer use to tick after every second and update a lable on UI. problem i was facing was that when time is enable none of the touch event was working.
I googled it and found that i have to call timer function from another thread..
after some effort i manage to run a separate thread. but now i m facing problems in calling a timer function here is the code.
Create Thread
myThread = [[NSThread alloc] initWithTarget:self selector:@selector(SapThread:) object:nil];
[myThread start];
SapThread Function....
- (void)SapThread:(id)info {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSTimer *appTimer = [NSTimer scheduledTimerWithTimeInterval:(1/20) target:self selector:@selector(UpdateTime) userInfo:nil repeats:YES];
[pool release];
UpdateTime Function for timer
-(void) UpdateTime
//set lable value.
problem is this that UpdateTime function never called.
Thankz in advance
Muhammad Usman Aleem

Answer 1

As I tried to explain above, I didn't expect your code to work after you corrected the firing method signature.
Your detached thread doesn't run until you release your myThread object. It terminates when execution reaches the end of your SapThread method. That's why the timer never fires when you run it in that thread.
In any case, I think sptrakesh is absolutely correct. There's no reason a timer in the main thread should prevent you from catching touch events. So I think you have two major points of confusion:
1) Your thread isn't doing anything, since it terminates before the timer ever fires once;
2) You have mis-diagnosed the problem with the touch events and don't need a new thread. I.e. even if you got a detached thread working to fire your timer, that's not going to solve your touch problem.
I think bringing a new thread into the mix has gotten you in over your head and taken your attention away from the primary problem. So take sptrakesh's advice. Put the timer back into the main thread and focus on why you're not catching the events you want.