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 Fernando's book will guide you in fixing bugs in three real, open-source, downloadable apps from the App Store. Learn applied programming fundamentals by refactoring real code from published apps. Hacking with Swift readers get a $10 discount!
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.
