Iphone 如何平滑地上下设置图像动画。苹果手机

我想上下平滑地设置图像的动画。任何人都知道怎么做。

看看简单的UIView UIImageView动画

iPhone应用程序中最酷的一点是它们中的许多应用程序都是动画。您可以在屏幕上浏览视图、淡入淡出、旋转等等！ 这不仅看起来很酷，而且动画是一个很好的指示器，表明用户应该注意正在发生的事情，例如更多的信息变得可用

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确保导入以下框架：

进口 进口

您可以使用这些值，直到获得所需的结果。如果这是你的解决方案，就接受这个答案

- (void) showProgressView
{
if (progressViewBack.frame.origin.y == 460.0)
{
    [self.view bringSubviewToFront:progressViewBack];
    [progressViewBack setFrame:CGRectMake(6.0, 460, 308.0, 126.0)];
    [progressViewBack setBounds:CGRectMake(0, 0, 308, 126.0)];

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationDelegate:self];
    [progressViewBack setFrame:CGRectMake(6.0, 334.0, 308.0, 126.0)];
    [UIView commitAnimations];
}
else if (progressViewBack.frame.origin.y == 334.0)
{   
    [progressViewBack setFrame:CGRectMake(6.0, 334.0, 308.0, 126.0)];       
    [progressViewBack setBounds:CGRectMake(0, 0, 308.0, 126.0)];

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationDelegate:self];
    [progressViewBack setFrame:CGRectMake(6.0, 460.0, 308.0, 126.0)];
    [UIView commitAnimations];
}

}

- (void) showProgressView
{
if (progressViewBack.frame.origin.y == 460.0)
{
    [self.view bringSubviewToFront:progressViewBack];
    [progressViewBack setFrame:CGRectMake(6.0, 460, 308.0, 126.0)];
    [progressViewBack setBounds:CGRectMake(0, 0, 308, 126.0)];

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationDelegate:self];
    [progressViewBack setFrame:CGRectMake(6.0, 334.0, 308.0, 126.0)];
    [UIView commitAnimations];
}
else if (progressViewBack.frame.origin.y == 334.0)
{   
    [progressViewBack setFrame:CGRectMake(6.0, 334.0, 308.0, 126.0)];       
    [progressViewBack setBounds:CGRectMake(0, 0, 308.0, 126.0)];

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationDelegate:self];
    [progressViewBack setFrame:CGRectMake(6.0, 460.0, 308.0, 126.0)];
    [UIView commitAnimations];
}