xcode UIImageView 缩放/淡入淡出动画？
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UIImageView Zoom/Fade animation?
提问by Jon Sullivan
I want to make a little zoom/fade animation for when the UIImageView shows up in my view, I already have the code for the fade effect:
当 UIImageView 出现在我的视图中时，我想制作一些缩放/淡入淡出动画，我已经有了淡入淡出效果的代码：
banner.alpha = 0.0;
[UIView animateWithDuration:2.0 animations:^{
banner.alpha = 1.0;
}];
Now I want to know if there is another easy way to combine the fade effect with a little zoom effect, like the image becoming larger and filling up the frame as it fades in? Any ideas? Thanks!
现在我想知道是否有另一种简单的方法可以将淡入淡出效果与一点缩放效果相结合，例如图像变大并在淡入时填满框架？有任何想法吗？谢谢！
回答by Guo Luchuan
you can use CG_EXTERN CGAffineTransform CGAffineTransformMakeScale(CGFloat sx, CGFloat sy)to do the zoom effect
你可以CG_EXTERN CGAffineTransform CGAffineTransformMakeScale(CGFloat sx, CGFloat sy)用来做缩放效果
such as
如
banner.alpha = 0.0;
[UIView animateWithDuration:2.0 animations:^{
banner.alpha = 1.0;
banner.transform =CGAffineTransformMakeScale(1.3,1.3);
}];
回答by T0m_Twt
You can also use the frame
您也可以使用框架
banner.alpha = 0;
[UIView animateWithDuration:2.0f animations:^(void){
banner.alpha = 1.0f;
[banner setFrame:CGRectMake(0, 0, 1024, 748)];
}];
// With Completion
[UIView animateWithDuration:0.1f animations:^(void){
banner.alpha = 1.0f;
[banner setFrame:CGRectMake(0, 0, 1024, 748)];
}completion:^(BOOL finished) {
}];
