CATransform3D无法正常工作

Question

CATransform3D无法正常工作，我使用下面的代码。我的问题是如果我改变变换它的工作正常。一旦我松开手指然后进行更多变换，图像就会转到初始图像。如何设置最后一次转换？我正在使用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表示每次视图接触时重置转换。请改用CATransform3D rotationAndPerspectiveTransform = layer.transform;。