简单核心动画：UIView的3D变换

Question

我想用Core Animation（CA）制作简单的部分翻转动画，但是在透视方面遇到了问题。我尝试过：

    [UIView animateWithDuration:1.0 animations:^{
    self.someView.layer.anchorPoint = CGPointMake(0.5, 0);
    self.someView.layer.transform = CATransform3DMakeRotation(M_PI*0.6,1.0,0.0,0.0);
} completion:^(BOOL finished){
    // code to be executed when flip is completed
}];

如何获得这种漂亮的视角？

- dormitkon

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重复的问题？-https://dev59.com/ynRC5IYBdhLWcg3wSu97 - Justin Meiners

Answer 1

像这样就可以了：

CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / -1000.0;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, M_PI * 0.6, 1.0f, 0.0f, 0.0f);
[UIView animateWithDuration:1.0 animations:^{
    self.someView.layer.anchorPoint = CGPointMake(0.5, 0);
    self.someView.layer.transform = rotationAndPerspectiveTransform;
} completion:^(BOOL finished){
    // code to be executed when flip is completed
}];

- bvogelzang

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几乎就是那样，但需要在外面而不是里面。灰线固定在图像上。 - dormitkon

稍微调整了一下m34属性，(1.0/-1000)，现在看起来很不错 :) 谢谢 - dormitkon

Answer 2

如何将透视变换应用于UIView？

请参见问题中的答案。

基本上，您需要修改控制对象缩小到背景的矩阵的m34值。

如果您想了解更多，请查看： http://www.songho.ca/opengl/gl_projectionmatrix.html

- Justin Meiners