Z方向UIView旋转？

发布于 2024-10-09 10:36:33 字数 527 浏览 3 评论 0原文

我正在使用以下代码来旋转 UIView 的 z 方向。它在右侧旋转。但我想旋转底部而不是右侧（因为它在右侧）。

UIView *myView = self.view;
CALayer *layer = myView.layer;

CATransform3D transform = CATransform3DIdentity;
transform.m34 = 1.0 / -2000;

CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / -500;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, 45.0f * M_PI / 180.0f, 0.0f, 1.0f, 0.0f);
layer.transform = rotationAndPerspectiveTransform;

原文

I am using following code for rotating z direction the UIView. It rotates in right side. But I want to rotate bottom side instead of right side (as it is in right side).

UIView *myView = self.view;
CALayer *layer = myView.layer;

CATransform3D transform = CATransform3DIdentity;
transform.m34 = 1.0 / -2000;

CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / -500;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, 45.0f * M_PI / 180.0f, 0.0f, 1.0f, 0.0f);
layer.transform = rotationAndPerspectiveTransform;

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挽梦忆笙歌 2024-10-16 10:36:33

您是否查看过 CATransform3DRotate 函数采用的参数？

最后三个元素定义视图将翻转的矢量。你的向量平行于 y 轴。尝试使用此方法来绕垂直轴旋转。

 rotationAndPerspectiveTransform = CATransform3DRotate(
            rotationAndPerspectiveTransform, 
            45.0f * M_PI / 180.0f,
            1.0f, 0.0f, 0.0f);

您可能需要更改锚点以使轴位于正确的“高度”。

Have you looked at the parameters the CATransform3DRotate function takes?

The last three elements define the vector the view will flip around. Your vector is parallel to the y axis. Try this instead for the rotation around a vertical axis.

 rotationAndPerspectiveTransform = CATransform3DRotate(
            rotationAndPerspectiveTransform, 
            45.0f * M_PI / 180.0f,
            1.0f, 0.0f, 0.0f);

You might need to change the anchor point to get the axis on the right "height".

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