nstimer

I have come across a lot of issues with how to handle NSTimer in background here on stack or somewhere else. I've tried one of all the options that actually made sense .. to stop the timer when the application goes to background with NSNotificationCenter.defaultCenter().addObserver(self, selector: "appDidEnterBackground", name: UIApplicationDidEnterBackgroundNotification, object: nil) and NSNotificationCenter.defaultCenter().addObserver(self, selector: "appDidBecomeActive", name: UIApplicationWillEnterForegroundNotification, object: nil) At first I thought that my problem is solved, I just

I'm trying to pass an argument to a method that is called by NSTimer in my code. It is throwing an exception. This is how I'm doing it. Circle is my custom class. var circle = Circle() var timer = NSTimer.scheduledTimerWithInterval(1.0, target: self, selector: animate, userInfo: circle, repeats: true) Below is the method that is being called func animate(circle: Circle) -> Void{ //do stuff with circle } Note: The method is in the same class that it is being called. So I believe i've set the target correctly. Andy The selector you use with NSTimer is passed the NSTimer object as it's one and

I have tried this but not working more than 180 sec in iOS 7 and Xcode 4.6.2. Please help me UIBackgroundTaskIdentifier bgTask = UIBackgroundTaskInvalid; UIApplication *app = [UIApplication sharedApplication]; bgTask = [app beginBackgroundTaskWithExpirationHandler:^{ [app endBackgroundTask:bgTask]; }]; NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:20 target:self selector:@selector(timerMethod) userInfo:nil repeats:YES]; [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes]; -(void) timerMethod{ NSLog(@"in timerMethod"); } null Unless you enable one of the

I have a question regarding UILabels. I'm not even sure it is the right way to pull this off but I am trying to update a UILabel to display two numbers from 0 to 24 then loop back to zero and display the numer squence again. The catch is, it needs to update the UILabel every 1/24 of a second. Here is the code I have so far... -(void)viewDidLoad { fpsTimer = [NSTimer scheduledTimerWithTimeInterval: .01 target: self selector: @selector(updateFpsDisplay) userInfo: nil repeats: YES]; } - (void)updateFpsDisplay { for (int i=0; i<100; i++) { NSLog(@"%d", i%24); [timecodeFrameLabel setText:[NSString

I've created a test application with timer before implementing it in my project. It was the first time I'm using timer. But the issue is when I implemented timer using [NSTimer timerWithTimeInterval: target: selector: userInfo: repeats: ]; , it is not working. Here is my code, Interface: @interface uialertViewController : UIViewController { NSTimer *timer; } -(void)displayAlert; -(void)hideandview; @end Implementation: @implementation uialertViewController - (void)viewDidLoad { [self displayAlert]; [super viewDidLoad]; } -(void)displayAlert{ timer = [NSTimer timerWithTimeInterval:1 target:self