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PONSMutableArray removeAllObjects results in a crash
 

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  1. PONSMutableArray removeAllObjects results in a crash
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    <p>I have an <code>NSMutableArray</code> in my <code>ViewController</code> which is the datasource for my <code>UITableView</code> defined like so:</p> <pre><code>NSMutableArray *messageArray; </code></pre> <p>I have a method to reload the tableView data, before which, I want to clear the existing table data.</p> <p>If I use the following code: </p> <pre><code> [messageArray removeAllObjects]; [self.tableView reloadData]; </code></pre> <p>I get the following exception: </p> <blockquote> <p>2013-02-12 14:20:30.378 appname[20998:907] <strong>* Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[__NSCFArray removeObjectAtIndex:]: mutating method sent to immutable object' *</strong> First throw call stack: (0x3939e3e7 0x35dd6963 0x3939e307 0x393200e7 0x392eb5e5 0x7cda3 0x3a236047 0x3a2360d1 0x3a236047 0x3a235ffb 0x3a235fd5 0x3a23588b 0x3a235d79 0x3a15e5c9 0x3a14b8b1 0x3a14b1bf 0x336305f7 0x33630227 0x393733e7 0x3937338b 0x3937220f 0x392e523d 0x392e50c9 0x3362f33b 0x3a19f291 0x79c11 0x39be4b20) libc++abi.dylib: terminate called throwing an exception</p> </blockquote> <p>But if I use the following code, it works.</p> <pre><code> NSMutableArray *emptyArray = [NSMutableArray new]; messageArray = emptyArray; [self.tableView reloadData]; </code></pre> <p>Why am I getting an error for <code>removeAllObjects</code>? Could this be the culprit?</p> <pre><code> NSMutableDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:nil]; messageArray = responseDictionary[@"data"]; </code></pre>
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    1. USconorgriffin
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    1. COIs this related? http://stackoverflow.com/questions/5707360/why-am-i-getting-mutating-method-sent-to-immutable-object-when-trying-remove
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    2. COWhere do you alloc messageArray? Where do you fill it (ie what objects are in it when you removeAllObjects)?
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