nstimer

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 have a UIView with a UITableView and a UIImageView in it. The UITableView takes up the top half of the UIView . The UIImageView takes the bottom half of the UIView . I am using an NSTimer to update the image that is being displayed in the UIImageView . Basically, every 3 seconds, the UIImageView loads in a new UIImage . Problem is, if I select a row from the UITableView , the NSTimer keeps running. How can I stop the NSTimer on didSelectRowFromIndexPath , and then start it again when the view returns to the screen? -(void)viewDidLoad { NSThread* timerThread = [[NSThread alloc] initWithTarget

I am using NSTimer to look for updates in my firebase database. I have put the code inside my viewDidLoad() . NSTimer.scheduledTimerWithTimeInterval(5.0, target: self, selector: #selector(DriversInterfaceViewController.CheckFormularChild), userInfo: nil, repeats: true) When the user has received a file in the database I want the user to goto another ViewController . The problem is that either the old ViewController is running in the background or the timer does not stop when changing View Controller . let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil) let nextViewController

I am currently working on an app that requires a sound file to be played at exact intervals, which are variable in duration. I seem to remember being told that NSTimer simply places an operation onto the stack after the specified duration, rather than the operation being run after the specified duration. This would mean that if there were lots of other operations on the stack before it, it would not be called on time. I would like to know if this is indeed correct, and if so, is there any way of getting an operation to be guaranteed to run after a specified duration. Before any makes the

I keep having troubles with my NSTimers and background selectors. It is driving me nuts and takes a very long time to try out each tweak. To preserve my sanity, and the sanity of future generations of cocoa programmers, I'm asking this question: Is there an absolutely 100% sure way to have a scheduled, long-term timer fire at a later point in time, regardless of whether it was called from a background thread, main thread, etc? It seems that I keep having to solve the same problem over and over again for the majority of my classes that use NSTimers. they work during short-term testing, let's

Hi i have atask to develop the application with Nstimer and background process. I have already implement background process with timer. And it is excuting good.but i have problem when i minimize application first time at that time it is not running the background process. after minimizing application 3 to 4 times. After that it is working smoothly. i also display the code of background task and timer as follow. - (void)applicationDidEnterBackground:(UIApplication *)application { UIApplication* app = [UIApplication sharedApplication]; NSLog(@"Application enter in background"); [NSTimer

I have a timer that have to count up to 8 hours (28800 second) after that it should be released im wondering how to keep the timer running at the background and/or when application is closed? this is the NSTimer : stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateTimer) userInfo:nil repeats:YES]; and this is my condition : counter++; if (counter >= 28800) { [stopWatchTimer invalidate]; counter =0; timeLabel.text = @"Time Out"; } You can't - once your app is closed then it's not running anymore so the timer won't be running either. Take a look at