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POHow do you use a class method to distribute multiple shared instances of UIManagedDocument?
 

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  1. POHow do you use a class method to distribute multiple shared instances of UIManagedDocument?
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    <p>I have a helper class that distributes a shared instance of UIManagedDocument. The idea is that the user requests the UIManagedDocument shared instance for a particular file on disk. In this case, it's a core data store. If the user requests the core data store located at a different path I want to distribute an instance of UIManagedDocument for that file.</p> <p>My question is: Is it ok to create a new instance of a UIManagedDocument and assign it to the static variable when the file changes? For example:</p> <pre><code>+ (UIManagedDocument *)sharedManagedDocumentForFile:(NSString *)fileName { static UIManagedDocument *sharedDocument = nil; NSURL *url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]; url = [url URLByAppendingPathComponent:fileName]; // url is "&lt;Documents Directory&gt;/&lt;vacationName&gt;" // Create the shared instance lazily upon the first request. if (sharedDocument == nil) { sharedDocument = [[UIManagedDocument alloc] initWithFileURL:url]; } if (sharedDocument.fileURL != url) { UIManagedDocument *newDocument = [[UIManagedDocument alloc] initWithFileURL:url]; sharedDocument = newDocument; } return sharedDocument; } </code></pre> <p>Basically what I'm trying to do is distribute only one instance of a UIManagedDocument so in the event there are multiple writers to the core data store I don't have to constantly keep the changes in sync. However, since there are multiple core data stores on disk I can't just distribute the same static variable every time.</p> <p>Any ideas? I'm absolutely stuck on even how to approach this design problem... Any help is appreciated.</p> <p>Thanks - Jake</p>
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    1. USJake Vizzoni
    1. USJake Vizzoni
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    1. COI believe this comes with a mandatory sentence.
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    2. CO@Jave V I think he was joking...lol
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    3. COWhat exactly do you mean by 'ok' and 'legal'?
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