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PONSManagedObject Incompatible pointer type warnings
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  1. PONSManagedObject Incompatible pointer type warnings
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    copied!<p>Let me make sure first I have X-Code 4.3.2 version and iOS 5.1 SDK. I have below methods used in my project for core-data operation. Both method giving same warning. i.e <strong>"Incompatible pointer types returning 'NSManagedObject *' from a function with result type 'NSManagedObject &lt;Protocol> "</strong>.</p> <p><strong>Method A:</strong></p> <pre><code>- (NSManagedObject&lt;Protocol&gt; *)newMOforNilMOC { return [[NSManagedObject alloc] initWithEntity:[self entityDescription] insertIntoManagedObjectContext:nil]; } </code></pre> <p>For method <strong>method A</strong> I just do typecasting and added (NSManagedObject&lt;Protocol>*) then warning get removed as stated below. </p> <pre><code>- (NSManagedObject&lt;Protocol&gt; *)newMOforNilMOC { return (NSManagedObject&lt;Protocol&gt; *) [[NSManagedObject alloc] initWithEntity:[self entityDescription] insertIntoManagedObjectContext:nil]; } </code></pre> <p><strong>Method B:</strong></p> <pre><code>+ (NSManagedObject&lt;Protocol&gt; *) newInContext:(NSManagedObjectContext *)context { return [[NSEntityDescription insertNewObjectForEntityForName:[[(NSManagedObject&lt;Protocol&gt; *)self class] entityName] inManagedObjectContext:context]retain]; } </code></pre> <p>For <strong>method B</strong> when I do typecasting it will not work hence I just change the name of method from newInContext to AddnewInContext (Found somewhere when googled) then warning got removed.</p> <p>I have following Questions:</p> <ol> <li>If first method is required typecasting then why second one is not working with that solution?</li> <li>What is the exact meaning of changing the name of method. Is this proper way to remove above warning? Why typecasting not working in <strong>method B</strong>?</li> </ol> <p>This could be complicated one but feel free to leave comment if you have any doubt. Because I want to know the difference, at least I get to learn some new thing about core data.</p>
 

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