NSTimer延迟触发

@implementation MyClass

@synthesize timer;

-(void)loadView
{
    self.timer = [NSTimer scheduledTimerWithTimeInterval:0.0
                                             target:self
                                           selector:@selector(targetMethod:)
                                           userInfo:nil
                                            repeats:YES];
    [self performSelector:@selector(cancelTimer) withObject:nil afterDelay:5.0];
}

-(void)cancelTimer {
    [self.timer invalidate];
}

-(void)targetMethod:(NSTimer *)timer {
    NSLog(@"bla");
}

 

This is short and simple:

NSDate *endtime = [NSDate dateWithTimeIntervalSinceNow:5];
[NSTimer scheduledTimerWithTimeInterval:1
         target:self
         selector:@selector(timerTick:)
         userInfo:endtime
         repeats:YES];


-(void)timerTick:(NSTimer*)timer
{
    NSLog(@"timer tick");
    if ( [timer.userInfo timeIntervalSinceNow] < 0 )
    {
        [timer invalidate];
        NSLog(@"invalidating timer");
    }
}