旋转父视图时以相同的角度旋转子视图

Question

我想在旋转父视图时旋转具有相同角度的子视图。我如何实现这一目标？

- (void)rotationDetected:(UIRotationGestureRecognizer *)rotationRecognizer {   
    rotationRecognizer.rotation = M_PI_4;
    CGFloat angle = rotationRecognizer.rotation; 
    duplicateView.transform = CGAffineTransformRotate(duplicateView.transform, angle); 
    userView.transform = duplicateView.transform; 
    rotationRecognizer.rotation = 0.0; 
}

Answer 1

如果旋转UIView的父视图，子视图也将以相同的方式旋转。您不必编写任何特殊代码来实现这一目标。