A Core Graphics context is a canvas which we can draw in it and set some properties like the line thickness.
To make a context, we use the UIGraphicsBeginImageContextWithOptions()
C function. Then, when we are done with drawing, we just call UIGraphicsEndImageContext()
to end the context:
let size = CGSize(width: 256, height: 256)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
let context = UIGraphicsGetCurrentContext()
// drawing code here
UIGraphicsEndImageContext()
CGSize size = [CGSize width:256 height:256];
UIGraphicsBeginImageContextWithOptions(size, NO, 0);
CGContext *context = UIGraphicsGetCurrentContext();
// drawing code here
UIGraphicsEndImageContext();
In the code above, we passed 3 parameters to the UIGraphicsBeginImageContextWithOptions()
function:
CGSize
object which stores the whole size of the context (the canvas)