nstimer

I am developing an app where i want to call method in separate queue using dispatch_async . I want to call that method repeatedly after certain interval of time. But the method is not getting called. I don't know whats wrong. Here is my code: dispatch_async( NotificationQueue, ^{ NSLog(@"inside queue"); timer = [NSTimer scheduledTimerWithTimeInterval: 20.0 target: self selector: @selector(gettingNotification) userInfo: nil repeats: YES]; dispatch_async( dispatch_get_main_queue(), ^{ // Add code here to update the UI/send notifications based on the // results of the background processing }); })

I am developing an iPhone game in which birds bounce. I have set up the images for animating the wings of the flying bird like this: [imgBird[i] setAnimationImages:birdArrayConstant]; [imgBird[i] setAnimationDuration:1.0]; [imgBird[i] startAnimating]; Now how I make the bird move is to use an NSTimer to fire every 0.03 seconds which adds/subtracts 1 from the x or y coordinate from imgBird[i].center. I learnt about doing it like this from here. http://icodeblog.com/2008/10/28/iphone-programming-tutorial-animating-a-ball-using-an-nstimer/ But the issue is the birds slow down as soon as another

I am trying to create a simple stopwatch. I referred to this website ( http://www.apptite.be/tutorial_ios_stopwatch.php ) to do this app. When I click the start button, I get -596:-31:-23:-648 and the stopwatch does not run. The code looks like: ViewController.h #import <UIKit/UIKit.h> @interface ViewController : UIViewController{ UILabel *lbl; NSTimer *stopTimer; NSDate *startDate; } @property (strong,nonatomic) IBOutlet UILabel *lbl; -(IBAction)startPressed:(id)sender; -(IBAction)stopPressed:(id)sender; -(void)updateTimer; @end ViewController.m #import "ViewController.h" @interface

I have an application with a countdown timer. I've made it with a label that is updated with a function called from a timer this way: ... int timeCount = 300; // Time in seconds ... NSTimer *myTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(actualizarTiempo:) userInfo:nil repeats:YES]; ... - (void)actualizaTiempo:(NSTimer *)timer { timeCount -= 1; if (timeCount <= 0) { [timer invalidate]; } else { [labelTime setText:[self formatTime:timeCount]]; } } Note: formatTime is a function which receive an integer (number of seconds) and returns a NSString with format mm

I have a timer calling a method but this method takes one paramether: theTimer = [NSTimer scheduledTimerWithTimeInterval:animationInterval target:self selector:@selector(timer) userInfo:nil repeats:YES]; should be theTimer = [NSTimer scheduledTimerWithTimeInterval:animationInterval target:self selector:@selector(timer:game) userInfo:nil repeats:YES]; now this syntax doesn't seems to be right. I tried with NSInvocation but I got some problems: timerInvocation = [NSInvocation invocationWithMethodSignature: [self methodSignatureForSelector:@selector(timer:game)]]; theTimer = [NSTimer

I'm here because a didn't find any solutions for my issue :( I'm doing an simple application in which i have to send (by socket) some informations to a server (like GPS l/L, accuracy, Battery level, etc). The current code works fine when application is in foreground. myTimer = [NSTimer scheduledTimerWithTimeInterval: 2.0 target:self selector: @selector(sendPosToServer:) userInfo:nil repeats: YES]; myTimer2 = [NSTimer scheduledTimerWithTimeInterval: 3.0 target:self selector: @selector(sendBatteryToServer:) userInfo:nil repeats: YES]; myTimer3 = [NSTimer scheduledTimerWithTimeInterval: 5.0