NSGraphicsContext
Crowd-sourced documentation and tutorials by the Cocoa developer community
ApplicationKit/Classes/NSGraphicsContext_Class/index.html
The NSGraphicsContext class is the programmatic interface to objects that represent graphics contexts.
To avoid the following error in the console:
unlockFocus called too many time
Make sure you're saving/restoring the graphics context properly. Example:
[[[NSGraphicsContext]] saveGraphicsState];
[[[NSGraphicsContext]] setCurrentContext:[[[NSGraphicsContext]] graphicsContextWithGraphicsPort:context flipped:NO]];
// draw something
[[[NSGraphicsContext]] restoreGraphicsState];
