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Re: avoid AlertPanel in opening a document

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Re: avoid AlertPanel in opening a document

Subject: Re: avoid AlertPanel in opening a document
From: "Gerriet M. Denkmann" <email@hidden>
Date: Sun, 20 Jul 2008 07:57:15 +0700

On Sat, 19 Jul 2008 09:43:57 -0700, Quincey Morris <email@hidden>wrote:


On Jul 19, 2008, at 01:58, Gerriet M. Denkmann wrote:

In -readFromURL:ofType:error: of a document-based app I make some
checks and if something looks suspicious I show an AlertPanel with:
"Something strange. (Open anyway) (Do not open)"

If the user clicked on (Do not open) I return NO and set the NSError
to nil.

But then another panel comes up with "Document <name> could not be
opened. (OK)".
This is kind of silly, as the user just has clicked on (Do not open).

How can this second panel be avoided? Using 10.4.11 Tiger.


Return an error with domain=NSCocoaErrorDomain and
code=NSUserCancelledError.


Works perfectly. Thanks!

Btw., this is mentioned in the "Error Handling in the Document Architecture" section of the "Document-Based Applications Overview" and also in: "Error Handling Programming Guide For Cocoa". Very easy to find, if one knows, what terms to search for.

Kind regards,

Gerriet.

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