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copied!<p>No, you don't want to instantiate an NSManagedObject via alloc/init. You should use <code>NSEntityDescription</code>'s <code>insertNewObjectForEntityForName:inManagedObjectContext:</code>. Something like:</p> <pre><code>ClassA *obj = [NSEntityDescription insertNewObjectForEntityForName:@"ClassA" inManagedObjectContext:context]; // ClassA is NSManagedObject Class </code></pre> <p>In order to have a <code>NSManagedObjectContext</code>, you also need an <code>NSPersistentStoreCoordinator</code>, and an <code>NSManagedObjectModel</code>, etc. Yeah, it's complex. <a href="http://rads.stackoverflow.com/amzn/click/0321670426" rel="nofollow">This book</a> really helped me get my head around Core Data; I recommend it wholeheartedly.</p> <p>See the <a href="https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdCreateMOs.html" rel="nofollow">Core Data Programming Guide section on creating and deleting managed objects</a>. Actually, while you're there, I'd recommend reading the entire <a href="https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CoreData/cdProgrammingGuide.html#//apple_ref/doc/uid/TP30001200-SW1" rel="nofollow">Core Data Programming Guide</a>. Core Data is amazing and powerful, but it is complex; you really want to know what you're doing.</p> <p><strong>Update</strong>: The fact that you're using RestKit might change what I said above. It may be that RestKit has it's own API for doing Core Data stuff, I'm not sure. Maybe check the docs.</p>

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