NSApp hide: 实际上对 NSWindow 实例做了什么？
我正在开发一个 NSWindow 子类，并且遇到了一些奇怪的行为，这让我对 Windows 在 Mac OS X 上如何工作的一些假设产生了疑问。
NSWindow< 到底发生了什么调用 [[NSApplication sharedApplication] hide: self] 时的 /code> 实例？
所有不向 -(BOOL)canHide 返回 NO 的窗口都会从屏幕上消失。然后，当应用程序变为活动状态或调用 [NSApplication sharedApplication] unhide: self] 时，所有窗口都会重新出现。
我假设这可以通过拍摄当前窗口状态的快照，然后在所有 NSWindow 实例上调用 orderOut: ，然后在 时向后执行整个过程来实现。 >unhide: 被调用。
然而，情况似乎并非如此。我的 NSWindow 子类的 orderOut: 方法没有被调用..事实上它也没有隐藏。它确实将 setCanHide: 设置为 YES，但发生了什么？
任何见解将非常感激。
最好的问候，
弗兰克
I'm working on an NSWindow subclass and I'm running into some strange behavior that makes me question some of my assumptions about how windows work on Mac OS X.
What precisely happens to NSWindow instances when [[NSApplication sharedApplication] hide: self] is called?
All windows that do not return NO to -(BOOL)canHide disappear from the screen. Then all windows re-appear when the application becomes active or [NSApplication sharedApplication] unhide: self] is called.
I had assumed that this would be achieved by taking a snapshot of the current window state, then calling orderOut: on all NSWindow instances and then performing the whole thing backwards when unhide: is called.
That does not seem to be the case, however. The orderOut: method of my NSWindow subclass isn't called.. in fact it's not hidden either. It does set setCanHide: to YES though.. what's happening?
Any insights would be very much appreciated.
Best regards,
Frank
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启动 Instruments 并亲自找出答案！在我的机器 (10.6.4) 和 32 位应用程序上，
[NSApplication hide:]调用ShowHideProcess。它在那里记录：http://developer.apple。 com/library/mac/#documentation/Carbon/Reference/Process_Manager/process_mgr_ref.pdf
然后，
ShowHideProcess调用CPSPostHideReq（CoreGraphics 中的某些内容） em>）。但没有 orderOut:，实际上根本没有 objc_msgSend() 。
你需要它做什么？或者你只是好奇？因为在大多数情况下，您应该很好地监听
NSApplicationWill/DidHideNotification。Fire up Instruments and find out for yourself! On my machine (10.6.4) and a 32-Bit application,
[NSApplication hide:]callsShowHideProcess. It's documented there:http://developer.apple.com/library/mac/#documentation/Carbon/Reference/Process_Manager/process_mgr_ref.pdf
The
ShowHideProcessthen callsCPSPostHideReq(something in CoreGraphics).But there is no orderOut:, actually no
objc_msgSend()at all.What do you need it for? Or were you just curious? Because for most cases, you should do just fine listening for the
NSApplicationWill/DidHideNotification.