UIGraphicsBeginImageContext must be Retina-aware?

You can create the image context like this:

 UIGraphicsBeginImageContextWithOptions(size, false, UIScreen.main.scale)

ios core-graphics core-image

You can get the scale value of your device by the following method

[[UIScreen mainScreen] scale]

With this information you can decide how many points you would like to draw.

CodeHunter