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cocoanswindowappkit

How to check if an NSWindow is open

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?

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

Solution

  • 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