iOS 计算时间差值

计算时间差值

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
//    [self performSelector:@selector(test:) withObject:nil afterDelay:10];
    
    CFAbsoluteTime currentTime = CFAbsoluteTimeGetCurrent();
    self.currentTime = currentTime;
    [self performSelector:@selector(test:) withObject:nil afterDelay:10];
}
-(void)test:(CFAbsoluteTime)time{
    CFAbsoluteTime currentTime = CFAbsoluteTimeGetCurrent();
    int cha = currentTime - self.currentTime;
    NSLog(@"");
}