CATransform3D旋转导致图像的一半消失 [英] CATransform3D rotate causes half of image to disappear

问题描述

我正在使用以下代码旋转图像，但是已经旋转出页面的图像的一半（沿着y轴）消失了。怎么修？ 标题以弧度为单位。

I'm using the following code to rotate an image, but half the image (down the y-axis) that has been rotated "out of" the page, disappears. How to fix? heading is in radians.

    CALayer *layer = myUIImageView.layer;
    CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
    rotationAndPerspectiveTransform.m34 = 1.0 / 500;
    rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, heading, 0.0f, 1.0f, 0.0f);
    layer.transform = rotationAndPerspectiveTransform;

推荐答案

解决方法是设置 zPosition 适当的所有图层的属性。感谢@Brad Larson，他在此处的评论中提出了此解决方案。看来，当你开始使用 CATransform3D 时，由addsubview建立的普通zindex视图层次结构将被抛出窗口。

The solution to this was to set the zPosition property of all my layers appropriately. Thanks is due to @Brad Larson, who suggested this solution in a comment here. It seems that, when you start using CATransform3D, the normal zindex view hierarchy established by addsubview is thrown out the window.

这篇关于CATransform3D旋转导致图像的一半消失的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！