How to find the rotation from a CGAffineTransform
Swift version: 5.6
A CGAffineTransform value combines scale, translation and rotation all at once, but if you just want to know its rotation value is then use this code:
func rotation(from transform: CGAffineTransform) -> Double {
return atan2(Double(transform.b), Double(transform.a))
}
SPONSORED Join a FREE crash course for mid/senior iOS devs who want to achieve an expert level of technical and practical skills – it’s the fast track to being a complete senior developer! Hurry up because it'll be available only until April 28th.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 2.0
Similar solutions…
- How to detect device rotation
- How to find the translation from a CGAffineTransform
- How to find the scale from a CGAffineTransform
- How to scale, stretch, move, and rotate UIViews using CGAffineTransform
- How to find a UIView subview using viewWithTag()
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
