Creates a bitmap-based graphics context and makes it the current context.
SDKs
- iOS 2.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- UIKit
Declaration
func UIGraphicsBeginImageContext(_ size: CGSize)
Parameters
sizeThe size of the new bitmap context. This represents the size of the image returned by the
UIGraphicsfunction.Get Image From Current Image Context()
Discussion
This function is equivalent to calling the UIGraphics function with the opaque parameter set to false and a scale factor of 1.
This function may be called from any thread of your app.