如何检查NSWindow是否打开 [英] How to check if an NSWindow is open

问题描述

我有一个NSWindow，可以将其关闭然后重新打开(我称为[setReleasedWhenClosed: NO]).如何以编程方式检查它是打开还是关闭?

I have an NSWindow which can be closed and reopened (I've called [setReleasedWhenClosed: NO]). How do I check if it is open or closed programmatically?

我已经阅读了文档和Googled，但是看不到执行此操作的理智方法. [isVisible]已过时. [occlusionState]不是我想要的.我已经使用通知解决了这个问题，但是我不敢相信NSWindow上没有某些属性或方法可以做到这一点

I've read the doc and Googled but can't see a sane way to do this. [isVisible] is deprecated. [occlusionState] isn't what I'm after. I've worked around it using notifications, but I can't believe there isn't some property or method on NSWindow to do this

推荐答案

您可以利用NSWindow的screen属性.如果窗口不在屏幕上，它将返回nil.请检查 https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSWindow_Class/index.html#//apple_ref/occ/instm/NSWindow/screen

You make make of use of screen property of NSWindow. If the window in offscreen it will return nil. Please check https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSWindow_Class/index.html#//apple_ref/occ/instm/NSWindow/screen

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