Question

我想为像弹跳的图像制作动画。我能够将它向前弹回但我无法将其推回去。我正在使用此代码：

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:2.0f];
hair.transform = CGAffineTransformMakeScale(3.0, 3.0);
[UIView commitAnimations];

请帮帮我..我现在是结构而且无法解决这个问题。请帮助我。

Answer 1

使用这几行代码来动画像弹跳一样的图像。

 imgView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.001, 0.001);

 //imgView is your UIImageView where you set an image 

[self.view addSubview:imgView];

[UIView animateWithDuration:0.3/1.5 animations:^{
    imgView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.1, 1.1);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3/2 animations:^{
    imgView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);
} completion:^(BOOL finished) {
    [UIView animateWithDuration:0.3/2 animations:^{
        imgView.transform = CGAffineTransformIdentity;                            
    }];
}];
}];

由于

Answer 2

请注意UIView reference：

在iPhone OS 4.0及更高版本中不鼓励使用此方法。您应该使用基于块的动画方法。

因此，在您的情况下，您可能希望实现以下内容：

[UIView animateWithDuration:2.0 animations:^(void) {
    hair.transform = CGAffineTransformMakeScale(2.0, 2.0);
} completion:^(BOOL finished) {
    if(finished){
        [UIView animateWithDuration:2.0 animations:^(void) {
            hair.transform = CGAffineTransformMakeScale(0.5, 0.5);
        }];
    }
}];

Answer 3

您可以使用此代码，只需要调用其中一个代码，它们就会自动相互调用

- （无效）animateZoomOut {

[UIView animateWithDuration:1
                      delay:0
                    options:UIViewAnimationOptionTransitionNone
                 animations:^ {
                     self.imgGift.transform = CGAffineTransformMakeScale(0.5, 0.5);
                 }completion:^(BOOL finished) {
                     [self animateGiftZoomIn];
                 }];

} - （无效）animateZoomIn {

[UIView animateWithDuration:1
                      delay:0
                    options:UIViewAnimationOptionTransitionNone
                 animations:^ {
                     self.imgGift.transform = CGAffineTransformMakeScale(1, 1);
                 }completion:^(BOOL finished) {
                     [self animateGiftZoomOut];
                 }];

}

为图像弹跳动画

3 个答案: