使用 Cocoa 在辅助监视器上全屏显示 macOS 窗口

问题描述

我正在开发 Cocoa Mac 应用程序，我需要在辅助监视器上全屏显示窗口/视图.

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

我知道如何创建可以拖到辅助显示器上的窗口，但我想以编程方式创建窗口并使其在外部显示器上全屏显示.

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.

推荐答案

首先，通过迭代[NSScreen screen]来确定你想要使用哪个屏幕.

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

创建一个全屏窗口:

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()];

你可能还想用谷歌搜索 CGDisplayCapture().

You might want to google CGDisplayCapture() as well.

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