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Editorial Team
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Asked: 2026-06-06T18:49:06+00:00

Is there a way I can I know if a document is locked or

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Is there a way I can I know if a document is locked or not? (I mean the string that appears in the title bar of a document based app in Cocoa, see picture)

I’ve been trying with -[NSDocument isInViewingMode] but it always returns NO 🙁 and been reading this thread without much success so far …

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  1. Editorial Team

    To my understanding, there are three cases to check for:

    • The doc has been locked by the user, which can be retrieved from the URL or file manager
    • The location of the document isn’t writable: perhaps it’s a read-only file system, or the user doesn’t have permission
    • the doc is old enough that the system thinks the user probably doesn’t actually want to edit it

    The first two you have to check for yourself. But the latter can be achieved by calling -checkAutosavingSafetyAndReturnError:

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