nsrunloop

I have an application for which the UI element includes an NSStatusItem and a menu. Inside my application , I am using NSTask asynchronously to perform some operation and I am using the output obtained using the NSFileHandleReadCompletionNotification to update the menu. But now whenever I click and open the menu , the main runloop goes into NSEventTrackingRunLoopMode and the notification posting fails. So basically with my menu open , no operation takes place on the main thread. Now I found a similar problem on this post but the accepted solution there does not seem to help. I understand that

I am doing an app which needs a timer. I have tried NSTimer but NSTimer always loses or gets delayed. Is there a class in the iOS SDK which can log time accurately. An accuracy between 20ms and 40ms is okay. I'd like to be able to change an image in a fixed time interval. NSTimer *timer1 = [NSTimer scheduledTimerWithTimeInterval:.04f target:self selector:@selector(timer1) userInfo:nil repeats:YES]; - (void)timer1 { NSLog(@"timer1 timer %@",[NSDate date]); } NSTimer is not a high-resolution timer. From the NSTimer class documentation: Because of the various input sources a typical run loop

I'm trying to run NSURLConnection async in a secondary thread (target is iOS4), for this I have created a concurrent NSOperation, I think I'm almost there, but am not clear on the following: 1) in iOS4 NSOperationQueue addOperation starts the operation in a new thread, because of the use of GCD, based on Technical Q&A QA1712 , however, my tests (simulator and iPad) show that start() is always called on the main thread, any idea, do I need a check here: if on main thread then spawn a new one? 2) if start was actually called on a secondary thread by addOperation(), then I could start my async

I have a connection in a thread, so I add it to the run loop to get all data: [[NSRunLoop currentRunLoop] run]; [connection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; But I can't find any way to stop it - (void)connectionDidFinishLoading:(NSURLConnection *)connection{ if([NSRunLoop currentRunLoop]){ [[NSRunLoop currentRunLoop] cancelPerformSelectorsWithTarget:self]; } [connection cancel]; } How can I stop this loop? You can stop the runloop by Core Fundation API : CFRunLoopStop(CFRunLoopGetCurrent()); 来源： https://stackoverflow.com/questions/16211915/stop-an

I am wondering if someone can explain why dispatching back to the main queue and creating a repeating NSTimer I am having to add it to RUN LOOP for it too fire? Even when using performselectorOnMainThread I still have to add it to a RUN LOOP to get it to fire. Below is an example of my question: #define queue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0) #define mainqueue dispatch_get_main_queue() - (void)someMethodBeginCalled { dispatch_async(queue, ^{ int x = 0; dispatch_async(mainqueue, ^(void){ if([_delegate respondsToSelector:@selector(complete:)]) [_delegate complete:nil]