xcode UIView 垂直翻转
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UIView flip vertically
提问by user966422
I know it's probably a dummy question, but I have to ask: How to flip a UIViewvertically? I'm not asking for doing a animation, but just flip it.
我知道这可能是一个愚蠢的问题，但我不得不问：如何UIView垂直翻转？我不是要求做动画，而是翻转它。
I can do vertical flip a UILabelby:
我可以UILabel通过以下方式进行垂直翻转：
label1.layer.transform = CATransform3DMakeRotation(M_PI, 1.0f, 0.0f, 0.0f);
label1.layer.transform = CATransform3DMakeRotation(M_PI, 1.0f, 0.0f, 0.0f);
and turn it back by:
并通过以下方式将其转回：
label1.layer.transform = CATransform3DMakeRotation(M_PI, 0.0f, 0.0f, 0.0f);
But when I'm doing it to a view:
但是当我对视图执行此操作时：
self.view.layer.transform = CATransform3DMakeRotation(M_PI, 1.0f, 0.0f, 0.0f);
I think it only rotate half way... So, any ideas?
我认为它只能旋转一半......所以，有什么想法吗？
Thanks guys.
谢谢你们。
回答by Mathew
I realize this is an old question, but I'll leave this here anyway. The following would flip the view vertically using just the y-scale of the layer, so it would be my preference:
我意识到这是一个老问题，但无论如何我都会把它留在这里。以下将仅使用图层的 y 比例垂直翻转视图，因此这将是我的偏好：
self.view.layer.transform = CGAffineTransform(scaleX: 1, y: -1)
