runloop timer sample

[ios]代码库

    NSOperationQueue* queue = [[NSOperationQueue alloc] init];
    NSBlockOperation* bop = [NSBlockOperation blockOperationWithBlock:^{
    NSTimer* timer = [NSTimer timerWithTimeInterval:1 target:self selector:@selector(handleTime:) userInfo:nil repeats:YES];
        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
        [[NSRunLoop currentRunLoop] runUntilDate:[NSDate distantFuture]];
        
        NSLog(@"heyheyhey\n");
    }];
    [queue addOperation:bop];


///////////////////////////////////////////

-(void) handleTime:(id)sender{
    NSLog(@"timer fired");
    counter++;
    if (counter == 10){
        NSTimer* t = sender;
        [t invalidate];
        counter = 0;
    }
}