如何在 NSWindow 中向下移动窗口控件（红绿灯）？

Question

我正在 macOS 上使用 React Native 编写一个应用程序。默认情况下，窗口显示如下：

我已经设法隐藏标题并使标题栏透明，这样（忽略屏幕截图中的标题）：

我现在想向下移动“交通灯”/设置工具栏样式以匹配如下所示的样式：

不幸的是，我似乎无法弄清楚执行此操作所需的设置组合等。

我被迫扩展 objective-c AppDelegate 实现。我有当前的代码；

- (void)applicationWillBecomeActive:(NSNotification *)notification
{
  NSWindow *window = [[NSApplication sharedApplication] mainWindow];
  window.titleVisibility = NSWindowTitleHidden;
  window.titlebarAppearsTransparent = true;
  window.styleMask |= NSWindowStyleMaskFullSizeContentView;
}

这有助于进入第二阶段。我尝试过诸如;

之类的变体

- (void)applicationWillBecomeActive:(NSNotification *)notification
{
  NSWindow *window = [[NSApplication sharedApplication] mainWindow];
  window.titleVisibility = NSWindowTitleHidden;
  window.titlebarAppearsTransparent = true;
  window.styleMask |= NSWindowStyleMaskFullSizeContentView;
  NSToolbar *toolbar = [NSToolbar init];
  window.toolbar = toolbar;
}

或

- (void)applicationWillBecomeActive:(NSNotification *)notification
{
  NSWindow *window = [[NSApplication sharedApplication] mainWindow];
  window.titleVisibility = NSWindowTitleHidden;
  window.titlebarAppearsTransparent = true;
  window.styleMask |= NSWindowStyleMaskFullSizeContentView;
  window.toolbarStyle = NSWindowToolbarStyleUnified;
}

以及

toolbarStyle

的其他变体，都无济于事。

Answer 1

以下代码对我有用：

- (void)applicationWillBecomeActive:(NSNotification *)notification
{
    NSWindow *window = [[[NSApplication sharedApplication] windows] firstObject];
    window.titleVisibility = NSWindowTitleHidden;
    window.titlebarAppearsTransparent = true;
    window.styleMask |= NSWindowStyleMaskFullSizeContentView;
    window.toolbar = [NSToolbar new]; // <-- Note this is `new` and not `init`
    window.toolbarStyle = NSWindowToolbarStyleUnified;
}