[iOS] 눈내리는 애니메이션 만들기

    UIImage* img = [UIImage imageNamed:@"bg_message.9.png"];

    UIImageView* imgView = [[UIImageView alloc ]initWithImage:img];

    imgView.center = CGPointMake(rand()%320, 0);

    [self.view addSubview:imgView];

    [UIView beginAnimations:nil context:nil];

    [UIView setAnimationDuration:2];

    imgView.center = CGPointMake(rand()%320, 480);

    [UIView commitAnimations];

    //[self finish:imgView];

    //특정함수를2초뒤

    [self performSelector:@selector(finish:) withObject:imgView afterDelay:2];

-(void) finish:(UIImageView*)imgView

{

    [imgView removeFromSuperview];

}