How to find the rotation from a CGAffineTransform
Swift version: 5.0
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))
}SPONSOR Meet the new Instabug – more than just bug reporting! We help you build better apps and minimize your debugging time. With each bug report, we automatically capture details like network requests, repro steps, and session details. Get real-time crash reports with stack trace details and session data to help you catch and fix issues easily. And with our customizable in-app surveys, you’ll gather insightful user feedback and much more. Instabug is the fastest and easiest way to release with confidence. Start your free trial now! Start your free trial now!
Available from iOS 2.0
Did this solution work for you? Please pass it on!
Other people are reading…
- How to draw a circle using Core Graphics: addEllipse(in:)
- How to find the translation from a CGAffineTransform
- How to use Core Graphics blend modes to draw a UIImage differently
- How to render a PDF to an image
- How to calculate the Manhattan distance between two CGPoints
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
