Applying scaling and rotation on a view using CGAffineTransform

Question

So I need to apply some scaling and some rotation to a view (I do this using gestures), so for each gesture I update the current scalling and rotation values with something

Answer 1

You should start from your current transformed state and apply transformation which is expected. Also you can have a look at CGAffineTransformConcat, it will make it a single transform before applying.

CGAffineTransform transform = yourView.transform;
transform = CGAffineTransformConcat(CGAffineTransformScale(transform,  self.scaleWidth, self.scaleHeight),
                                    CGAffineTransformRotate(transform, self.rotationAngle));
yourView.transform = transform;

Hope it helps!