codejobs - Correct way to draw background using a pattern image - Objective-C

image.m

// Save the current graphics state first so we can restore it.
[[NSGraphicsContext currentContext] saveGraphicsState];
     
// Change the pattern phase.
[[NSGraphicsContext currentContext] setPatternPhase:
NSMakePoint(0,[self frame].size.height)];
     
// Stick the image in a color and fill the view with that color.
NSImage *anImage = [NSImage imageNamed:@"bricks"];
[[NSColor colorWithPatternImage:anImage] set];
NSRectFill([self bounds]);
     
// Restore the original graphics state.
[[NSGraphicsContext currentContext] restoreGraphicsState];