Question

I want replicate the effect obtained by the following CSS code:

background: white url(./img/background.png) no-repeat;

I’ve written a subclass of NSView and override drawRect in this way:

- (void)drawRect:(NSRect)dirtyRect
{
    dirtyRect = [self bounds];

    [[NSColor whiteColor] setFill];
    NSRectFill(dirtyRect);

    [[NSColor colorWithPatternImage:[NSImage imageNamed:@"background.png"]] setFill];
    NSRectFill(dirtyRect);
}

(I apologize for my bad english)

Answer 1

Take a look at NSImage class reference. Image can be drawn with drawInRect:fromRect:operation:fraction: and also with drawAtPoint:fromRect:operation:fraction:.

So You can Use this:

[[NSImage imageNamed:@"background.png"] drawInRect:dirtyRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1]; // Passing NSZeroRect causes the entire image to draw. 

Instead this:

[[NSColor colorWithPatternImage:[NSImage imageNamed:@"background.png"]] setFill];
    NSRectFill(dirtyRect);