[IOS] Correct way to draw background using a pattern image

[IOS] Correct way to draw background using a pattern image.m

[[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];