UIImageView使用动画块从中心缩放 [英] UIImageView scale from center using Animation Blocks

问题描述

我正在使用以下内容来缩放图像，但它从左上角开始缩放，如何从中心缩放

I am using the following to scale image up but it's scaling from it's left top point, how can I make the scale from center

[UIView animateWithDuration:duration delay:delay options:options 
                 animations:^{
                     myImageView.frame = frame;
                     myImageView.alpha = alpha;
                 }
                 completion:^(BOOL finished) {

                 }
 ];

推荐答案

[UIView animateWithDuration:0.5 
                      delay:0
                    options:UIViewAnimationOptionBeginFromCurrentState
                 animations:(void (^)(void)) ^{
                     myImageView.transform=CGAffineTransformMakeScale(1.2, 1.2);
                 }
                 completion:^(BOOL finished){
                     myImageView.transform=CGAffineTransformIdentity;
                 }];

这将完美运作

祝你好运

this will work perfectly
Good Luck

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