如何在Notes iPad应用程序中重新创建动画?

UIImageView

NSArray* imageFrames = [NSArray arrayWithObjects:[UIImage imageNamed:@"frame1.png"],
                                                 [UIImage imageNamed:@"frame2.png"],
                                                 [UIImage imageNamed:@"frame3.png"],
                                                 [UIImage imageNamed:@"frame4.png"],
                                                 nil];
UIImageView* imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,100,100)];
[imageView setAnimationImages:imageFrames];
[imageView setAnimationDuration:10];
[imageView setAnimationRepeatCount:3];

UIImageView documentation

- (void)moveRedCircle {
    UIImageView *redcircle = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:@"redcircle.png"]];
    redcircle.bounds.origin = CGPointMake(x, y);
    [self.view addSubview:redcircle];
    [UIView animateWithDuration:4 animations:^{
        redcircle.bounds.origin = CGPointMake(x, y);
    }];
}