title: IOS: stop a generic thread
body: <p>In my app I use this code to start a NSThread</p>
  
  <pre><code>[NSThread detachNewThreadSelector:@selector(threadStart) toTarget:self withObject:nil];
  
  
  - (void)threadStart 
  {  
  NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
  
  //something to do...
  
  [pool release];
  }
  </code></pre>
  
  <p>my problem is that I want start and stop this thread sometimes, then I have to declare a thread in .h, to have a generic thread...is it possible?  </p>