最近的任务大多数是做UI和动画，今天遇到一个低级错误。

执行一个消失动画，把transform scale设置成0.0和0.0，打死动画都出不来，一直闪现

__weak __typeof__(self)weakSelf = self;
[UIView animateWithDuration:0.3f animations:^{
    __strong __typeof__(self)strongSelf = weakSelf;
    strongSelf.containerView.transform = CGAffineTransformMakeScale(0.0f, 0.0f);
    strongSelf.containerView.alpha = 0.0f;
} completion:^(BOOL finished) {
    [UIView animateWithDuration:0.3f animations:^{
        __strong __typeof__(self)strongSelf = weakSelf;
        strongSelf.alpha = 0.0f;
    } completion:^(BOOL finished) {
        if (completed) {
            completed();
        }
        __strong __typeof__(self)strongSelf = weakSelf;
        [strongSelf removeFromSuperview];
    }];
}];

查了老半天资料得知，CGAffineTransformMakeScale里x和y参数为零不会触发动画，直接就消失处理，把两个参数改大就好了

strongSelf.containerView.transform = CGAffineTransformMakeScale(0.01f, 0.01f);
strongSelf.containerView.alpha = 0.0f;