NSWindow 关闭时退出应用程序
当主应用程序（唯一的应用程序）关闭时，如何正确退出 Mac OS X 应用程序？
我知道 NSWindowDelegate 中有一个方法 - (void)windowWillClose:(NSNotification *)notification 。但它不太适合我的情况，因为它是在 NSWindow 关闭之前调用的。
How correctly to quit the Mac OS X app, when the main (the only one) closes?
I know there a method - (void)windowWillClose:(NSNotification *)notification in NSWindowDelegate. But it isn't quite suitable in my case, because it is called before NSWindow closes.
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您不能拥有
windowDidClose事件，因为伴随该事件的通知将持有无效对象（窗口可能在关闭时已被释放）。要实现您的需要，请将您的类设为应用程序的委托，并实现以下方法：从该方法中返回
YES。如果您的控制器对象在
MainMenu.nib中有一个实例，只需从文件所有者（即 MainMenu.nob 文件中的应用程序对象）建立连接即可。按住 Control 键并从文件所有者拖动到您的对象，然后连接委托插座。或者在源代码中，将类似的内容放入控制器对象的 init 方法中：
You cannot have
windowDidCloseevent since the notification that accompanies it would be holding an invalid object (the window is likely to have been deallocated on close). To achieve what you need, make your class the delegate of the Application, and implement the following method:From that method, return
YES.If your controller object has an instance in the
MainMenu.nib, just make a connection from File's Owner (which means Application Object in the MainMenu.nob file). Control-Drag from File's Owner to your object, and connect the delegate outlet.Or in source code, put something like this in your controller object's init method: