CATransform3D不能正常工作

Question

CATransform3D不能正常工作，我正在使用下面的代码。我的问题是，如果我改变变换，它就能正常工作。一旦我松开手指，然后进行更多的变换，图像就会转到初始图像。如何设置最后一次转换？我使用PanGesture进行转换。请给出一些想法。提前谢谢。

if ([recognizer respondsToSelector:@selector(translationInView:)]) {
    CGPoint translation = [(UIPanGestureRecognizer *)recognizer translationInView:recognizer.view.superview];
    CALayer *layer = self.layer;
    CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
    rotationAndPerspectiveTransform.m34 = 1.0 / -500;
    rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, translation.x * M_PI / 180.0f, 0.0f, 1.0f, 0.0f);
    layer.transform = rotationAndPerspectiveTransform;
    rotationAndPerspectiveTransform.m34 = 1.0 / -500;
    rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, -translation.y * M_PI / 180.0f, 1.0f, 0.0f, 0.0f);
    layer.transform = rotationAndPerspectiveTransform;
}

Answer 1

CATransform3DIdentity意味着每次你的视图接收到触摸时，你都会重置转换。请改用CATransform3D rotationAndPerspectiveTransform = layer.transform;。