Rotate UIView around its center keeping its size

Question

I\'m trying to rotate an UIView a few radians but after applying the transformation it doesn\'t look to be keeping its size. What\'s the proper way to achieve t

Answer 1

On Swift 3:

let degrees: CGFloat = -90
let radians = CGFloat(__sinpi(degrees.native/180.0))
view.transform = CGAffineTransform(rotationAngle: radians)

I'm using -90 because of this specific part of the documentation about the rotationAngle you have to pass to CGAffineTransform:

The angle, in radians, by which this matrix rotates the coordinate system axes. In iOS, a positive value specifies counterclockwise rotation and a negative value specifies clockwise rotation.