nstimer

What's the right way to do this? The NSTimer documentation says this: Special Considerations You must send this message from the thread on which the timer was installed. If you send this message from another thread, the input source associated with the timer may not be removed from its run loop, which could prevent the thread from exiting properly. Since GCD doesn't assure you that a serial queue will always run blocks on the same thread, what's the right way to ensure that you schedule and invalidate an NSTimer on the same thread? EDIT: Following the advise of the answer below, I created

I was under the impression that NSTimer did not work at all after an application calls applicationWillResignActive . I seems however that existing NSTimers (i.e. ones created before the application resigned active) will continue to run and its only new NSTimers that can't be scheduled in this state, can anyone confirm this? I am also assuming that its good (and Apple seems to say this too) that when your application calls applicationWillResignActive you should disable any NSTimers and start them again when applicationDidBecomeActive is called, does that make sense? When an application is

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to run a timer in the background of my application, i am using the timer heavily in my application and i'd rather running it in the background, However i am getting memory leaks when trying to release the NSAoutreleasePool. My Timer class is singleton, so if i start new timer the old timer get dealloc it . + (void)timerThread{ timerThread = [[NSThread alloc] initWithTarget:self selector:@selector(startTimerThread) object:nil]; //Create a new thread [timerThread start]; //start the thread } //the thread starts by sending this

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a simple timer using that is activated with a button is pushed. It runs from 60 to 0 no problem but what I want is to stop and reset the timer on push button. I have managed to stop it when the button is pressed using the code below but for some reason cannot get it to reset and stop at 60. This should be simple but it isn't working. Any suggestions? Timer is set using simple Action - (IBAction)timerStart:(id)sender { if(!secondCounter == 0){ [countdownTimer invalidate]; } else { [self setTimer]; } } CODE FOR TIMER - (void)timerRun {

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: 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"; } 回答1: You can't - once your app is closed then it's not running

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm using an NSTimer to do some rendering in an OpenGL based iPhone app. I have a modal dialog box that pops up and requests user input. While the user is providing input I'd like to "pause" i.e. something like this: [myNSTimer pause]; I'm using this syntax because I've been doing things like: [myNSTimer invalidate]; when I want it to stop. How can I programmatically pause the NSTimer? 回答1: From here: http://discussions.apple.com/thread.jspa?threadID=1811475&tstart=75 "You can store the amount of time that has passed since the timer started.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am banging my head against an odd error after a move to 10.12/Sierra and Xcode 8.1: +[NSTimer scheduledTimerWithTimeInterval:repeats:block:]: unrecognized selector sent to class 0x7fff78f1fa88 The most minimal code (default settings of create a new project) to reproduce this is: // AppDelegate.m // #import "AppDelegate.h" @interface AppDelegate () @property (weak) IBOutlet NSWindow *window; @property (strong, nonatomic) NSTimer * timer; @end @implementation AppDelegate - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

Possible Duplicate: NSTimer doesn't stop I have this code: [NSTimer scheduledTimerWithTimeInterval:110.0 target:self selector:@selector(targetMethod:) userInfo:nil repeats:YES]; - (void) targetMethod:(NSTimer) timer{ NSLog(@"Hello World");} in targetMethod I can stop timer with [timer invalidate], but out of this method, How can I stop targetMethod? You can keep your NSTimer in a variable and stop the timer using the invalidate method. Like the following: NSTimer * myTimer = [NSTimer scheduledTimerWithTimeInterval:110.0 target:self selector:@selector(targetMethod:) userInfo:nil repeats:YES];