子视图无旋转和缩放

Question

I have one UIView with slider and segment control as a subview. I am using gesture control to handle rotation and scalling. Now while rotating uiview, the slider and segment control also get rotated. I dont want rotation and scaling for subviews. Please help me to sort this issue.

Thanks

Answer 1

Don't have your segmented control and slider as subviews of the scaled view.

If necessary, you could have a containing superview that contains the scaled view, segmented control and slider as subviews.

Answer 2

You could "counter-rotate" your subviews when you handle the gesture for rotating the UIView.

Create a CGAffineTransformRotate and apply it to your subview in case you do not want it to rotate:

[UIView beginAnimations:nil context:nil];
CGAffineTransform transform = CGAffineTransformRotate(subview.transform, radians);
subview.transform = transform;
[UIView commitAnimations];

After you apply the transformation to the subviews, they will be rotated accordingly until you reset the transformation to its default value.