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Re: UIDocument + NSFileWrapper crashes on opening
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Re: UIDocument + NSFileWrapper crashes on opening


  • Subject: Re: UIDocument + NSFileWrapper crashes on opening
  • From: Luke the Hiesterman <email@hidden>
  • Date: Thu, 20 Jun 2013 14:16:42 -0700

Probably exactly as you said. Try overriding -readFromURL:error: to implement incremental reading.

Luke

On Jun 20, 2013, at 2:01 PM, Markus Spoettl <email@hidden>
 wrote:

> Hello everyone,
>
>  I have an iOS 6 app that uses UIDocument to implement loading and saving of my app's data. The document data is loaded from and saved to a NSFileWrapper (representing a file package containing many files and folders), handed from and to the document in -loadFromContents::: and -contentsForType::.
>
> This all works well for small documents but I now have a case where a document the app created in a previous session apparently is too big to be loaded.
>
> My app vanishes about 1-2 seconds after UIDocument calls -readFromURL:error: before my implementation of -loadFromContents::: is even called. There is no crash and no useful information (to me anyway) logged to the console. It just logs that my app was killed but gives no reason.
>
> I *suspect* UIDocument tries to load the whole package containing its 140MB of data in about 1000 files and couple of 100 folders and then chokes on it.
>
> The system had no problem creating the file package and saving it to the "disk", but it sure can't load it.
>
> I have tried on the simulator and using the same data as on the device it works, the data loads just fine.
>
> I'm pasting the console output of a typical session from the time the app is started via Springboard until it crashes/vanishes. Maybe it contains a clue I don't see.
>
> Does someone know what may be going on? I'm using Xcode 4.6.3 and iOS 6.1.3 (iPad Retina).
>
> Thanks!
> Regards
> Markus
>
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  • Follow-Ups:
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