CODEWITHSUNDEEP
iphoneobjective-ciosipad
Slee
Slee

Reputation: 28248

execute method after delay not using NSThread or sleep() - is there another option?

Is there a way in iOS4 to call a method after a delay using something else other than NSThread or blocking the UI using sleep()?

Upvotes: 17

Views: 6041

Answers (6)

karim
karim

Reputation: 15589

[NSTimer scheduledTimerWithTimeInterval:1.0 target:self 
         selector:@selector(aMethod:) userInfo:nil repeats:NO];

- (void) aMethod:(NSTimer *) aTimer {
  //task to do after the delay.
}

Upvotes: 1

Marcelo Alves
Marcelo Alves

Reputation: 1846

    double delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        // code to be executed on main thread.If you want to run in another thread, create other queue
    });

Upvotes: 29

Vijay-Apple-Dev.blogspot.com
Vijay-Apple-Dev.blogspot.com

Reputation: 25692

[self performSelector:@selector(methodName) withObject:nil afterDelay:2.0];

Upvotes: 3

Hollance
Hollance

Reputation: 2976

You can easily do that with:

[self performSelector:@selector(methodName) withObject:nil afterDelay:5];

Upvotes: 0

MByD
MByD

Reputation: 137322

You can using NSTimer. (for example timerWithTimeInterval:target:selector:userInfo:repeats)

Upvotes: 3

MarkPowell
MarkPowell

Reputation: 16540

- (void)performSelector:(SEL)aSelector withObject:(id)anArgument afterDelay:(NSTimeInterval)delay

Of NSObject will do this for you.

Additionally, you can create an NSTimer and have it perform a callback to some target and selector after a given amount of time.

Upvotes: 9

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