UIView缩放为0使用CGAffineTransformMakeScale [英] UIView scale to 0 using CGAffineTransformMakeScale

问题描述

是否可以使用CGAffineTransformMakeScale将UIView缩放到0（宽度和高度为0）？

view.transform = CGAffineTransformMakeScale（0.0f，0.0f）;

为什么会抛出<错误> ;: CGAffineTransformInvert：奇异矩阵。？

<还有另一种将UIView缩小到0的方法。

  [UIView beginAnimations：nil context：nil]; 
 [UIView setAnimationDuration：0.3]; 
 view.frame = CGRectMake（view.center.x，view.center.y，0，0）; 
 
 [UIView commitAnimations]; 
  

解决方案

有很多时候，反转您的变换矩阵。矩阵的逆是一些矩阵M'，使得矩阵M和逆矩阵M'的乘积是标识矩阵I. b
$ b <1> = M * M '

零矩阵没有逆矩阵，因此出现错误消息。

Is it possible to scale a UIView down to 0 (width and height is 0) using CGAffineTransformMakeScale?

view.transform = CGAffineTransformMakeScale(0.0f, 0.0f);

Why would this throw an error of "<Error>: CGAffineTransformInvert: singular matrix." ?

Update: There is another way of scaling down a UIView to 0

[UIView beginAnimations:nil context:nil]; 
[UIView setAnimationDuration:0.3]; 
view.frame = CGRectMake(view.center.x, view.center.y, 0, 0);

[UIView commitAnimations];

解决方案

There are lots of times when the underlying frameworks need to invert your transform matrix. The inverse of a matrix is some matrix M' such that the product of your matrix M and the inverse matrix M' is the identify matrix 1.

1 = M * M'

The zero matrix does not have an inverse, hence the error message.

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