Question

I’m working on a Cocoa Mac app where I need to display a window/view on a secondary monitor, full-screen.

I know how to create a window that could be dragged onto the secondary monitor, but I was wanting to programmatically create the window and make it full screen on the external monitor.

Answer 1

First, determine which screen you want to use by iterating over [NSScreen screens].

Create a full screen window with:

NSScreen *screen = /* from [NSScreen screens] */ NSRect screenRect = [screen frame]; NSWindow *window = [[NSWindow alloc] initWithContentRect:screenRect     styleMask:NSBorderlessWindowMask     backing:NSBackingStoreBuffered     defer:NO     screen:screen]; [window setLevel: CGShieldingWindowLevel()]; 

You might want to google CGDisplayCapture() as well.