Iphone 在UIButton中实现动画

我是cocoa和iphone编程新手，我想在UIButton中实现一个动画。例如，我创建了一个带有方形图像的自定义UIButton。然后，当我按下那个按钮时，方形图像将翻转。请注意，方形图像是UIButton的图像

[UIButton setImage:[UIImage imageNamed:@"square.png"]];

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下面是按下按钮时翻转按钮（带有背景图像）的完整代码。 基本上，您需要两个按钮和一个容器视图

///// .H file code....


    //Container views used for flipping the bars to show whose turn it is

    UIButton* btn1;
    UIButton* btn2;
UIView *BarContainerView;

///// .M file code....

- (void)viewWillAppear:(BOOL)animated
{

    BarContainerView = [[UIView alloc] initWithFrame:CGRectMake(20, 30, 103, 150)];

btn1 = [[UIButton buttonWithType:UIButtonTypeRoundedRect]retain];
[btn1 addTarget:self action:@selector(btn1_click) forControlEvents:UIControlEventTouchUpInside];
[btn1 setBackgroundImage:[UIImage imageNamed:@"image1.png"] forState:UIControlStateNormal];
btn1.frame = CGRectMake(0, 0, 103, 150);

btn2 = [[UIButton buttonWithType:UIButtonTypeRoundedRect]retain];
[btn2 addTarget:self action:@selector(btn2_click) forControlEvents:UIControlEventTouchUpInside];
[btn2 setBackgroundImage:[UIImage imageNamed:@"image2.png"] forState:UIControlStateNormal];
btn2.frame = CGRectMake(0, 0, 103, 150);

[BarContainerView addSubview:btn1];
[self.view addSubview:BarContainerView];
[self.view bringSubviewToFront:BarContainerView];

}

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我也有同样的问题，我用一种非常相似的方式解决了它。我只是对UIButton进行了子类化，并实现了如下方法：

- (void) flipBackgroundImage:(UIImage*) image
{
    [UIView beginAnimations:@"flipbutton" context:NULL];
    [UIView setAnimationDuration:0.4];
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self cache:YES];

    [self setBackgroundImage:image forState:UIControlStateNormal];

    [UIView commitAnimations];
}

工作起来很有魅力

干杯， 安卡

- (void) flipBackgroundImage:(UIImage*) image
{
    [UIView beginAnimations:@"flipbutton" context:NULL];
    [UIView setAnimationDuration:0.4];
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self cache:YES];

    [self setBackgroundImage:image forState:UIControlStateNormal];

    [UIView commitAnimations];
}