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PONSMutableArray Element lost when displaying in NSTableView is called
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  1. PONSMutableArray Element lost when displaying in NSTableView is called
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    copied!<p>I was trying to display the contents of an array into a table view. The table view has single column. My class is <strong>RKCandidate</strong> which is a subclass of <strong>NSWindowController</strong>. RKCandidate is also the Owner of the 'nib' file In IB I have selected the File's Owner as the dataSource of the tableview.</p> <p>There are the methods I'm using to update the tableview,</p> <pre><code>- (id) initWithClient:(TextInputController *) client { self = [super initWithWindowNibName:@"RKCandidate"]; if (self != nil) { _client = client; } return self; } - (void) dealloc { [optionsArray release]; [super dealloc]; } - (void) updateCandidate { NSLog(@"updateCandidate Called.\n"); optionsArray = [_client composedStringArray:self]; [candidateOptions reloadData]; NSLog(@"Retain Count of OptionsArray: %i\n",[optionsArray retainCount]); NSLog(@"Object Count of OptionsArray: %i\n",[optionsArray count]); NSLog(@"Address of Object: %i\n",[optionsArray objectAtIndex:0]); NSLog(@"Object: %@\n",[optionsArray objectAtIndex:0]); //NSString *benChar = [optionsArray objectAtIndex:0]; //NSLog(@"Object Retain Count: %@i\n",[benChar retainCount]); } #pragma mark TableView Data Source Methods #pragma mark - - (NSInteger)numberOfRowsInTableView:(NSTableView *)aTableView { NSLog(@"Retain Count of OptionsArray: %i\n",[optionsArray retainCount]); NSLog(@"Object Count of OptionsArray: %i\n",[optionsArray count]); NSLog(@"Address of Object: %i\n",[optionsArray objectAtIndex:0]); NSLog(@"Object: %@\n",[optionsArray objectAtIndex:0]); //NSLog(@"Object Retain Count: %@i\n",[[optionsArray objectAtIndex:0] retainCount]); return [optionsArray count]; } - (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex { NSLog(@"Retain Count of OptionsArray: %i\n",[optionsArray retainCount]); NSLog(@"Object Count of OptionsArray: %i\n",[optionsArray count]); NSLog(@"Address of Object: %i\n",[optionsArray objectAtIndex:0]); NSLog(@"Object: %@\n",[optionsArray objectAtIndex:0]); //NSLog(@"Object Retain Count: %@i\n",[[optionsArray objectAtIndex:0] retainCount]); return [optionsArray objectAtIndex:rowIndex]; } </code></pre> <p>The <strong>optionsArray</strong> is updated by a simple method from client the method is as follows,</p> <pre><code>-(NSMutableArray *) composedStringArray:(id)sender { NSLog(@"returning composedStringArray.\n"); return convertBufferArray; } </code></pre> <p><strong>convertBufferArray</strong> is a mutable array.</p> <p>When the <strong>updateCandidate</strong> method is called for the first time. It works nicely. But problem starts when I call it second time after updating the <strong>convertBufferArray</strong> array inside the client.</p> <p>When the <strong>updateCandidate</strong> method is called from the first time the Console log is as follows:</p> <pre><code>2010-11-20 09:03:35.385 Input Method Tester[7225:a0f] Retain Count of OptionsArray: 1 2010-11-20 09:03:35.385 Input Method Tester[7225:a0f] Object Count of OptionsArray: 1 2010-11-20 09:03:35.386 Input Method Tester[7225:a0f] Address of Object: 1372384 2010-11-20 09:03:35.386 Input Method Tester[7225:a0f] Object: ∆ 2010-11-20 09:03:35.392 Input Method Tester[7225:a0f] Retain Count of OptionsArray: 1 2010-11-20 09:03:35.392 Input Method Tester[7225:a0f] Object Count of OptionsArray: 1 2010-11-20 09:03:35.393 Input Method Tester[7225:a0f] Address of Object: 1372384 2010-11-20 09:03:35.393 Input Method Tester[7225:a0f] Object: ∆ 2010-11-20 09:03:35.397 Input Method Tester[7225:a0f] Retain Count of OptionsArray: 1 2010-11-20 09:03:35.397 Input Method Tester[7225:a0f] Object Count of OptionsArray: 1 2010-11-20 09:03:35.398 Input Method Tester[7225:a0f] Address of Object: 1372384 2010-11-20 09:03:35.399 Input Method Tester[7225:a0f] Object: ∆ </code></pre> <p>The table view displays the content of the array.</p> <p>But when I just add another letter to the <strong>Object</strong> string, some how, the string gets replaced with an empty string when the - (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex is called. The log is as follows.</p> <pre><code>2010-11-20 09:03:38.349 Input Method Tester[7225:a0f] returning composedStringArray. 2010-11-20 09:03:38.350 Input Method Tester[7225:a0f] Retain Count of OptionsArray: 1 2010-11-20 09:03:38.351 Input Method Tester[7225:a0f] Object Count of OptionsArray: 1 2010-11-20 09:03:38.352 Input Method Tester[7225:a0f] Address of Object: 1372384 2010-11-20 09:03:38.353 Input Method Tester[7225:a0f] Object: ∆ç 2010-11-20 09:03:38.354 Input Method Tester[7225:a0f] Retain Count of OptionsArray: 1 2010-11-20 09:03:38.354 Input Method Tester[7225:a0f] Object Count of OptionsArray: 1 2010-11-20 09:03:38.354 Input Method Tester[7225:a0f] Address of Object: 1372384 2010-11-20 09:03:38.355 Input Method Tester[7225:a0f] Object: ∆ç 2010-11-20 09:03:38.358 Input Method Tester[7225:a0f] Retain Count of OptionsArray: 1 2010-11-20 09:03:38.358 Input Method Tester[7225:a0f] Object Count of OptionsArray: 1 2010-11-20 09:03:38.359 Input Method Tester[7225:a0f] Address of Object: 1372384 2010-11-20 09:03:38.359 Input Method Tester[7225:a0f] Object: </code></pre> <p>As you can see in the list line of the above log the string is empty. The tableView become empty.</p> <p>Is there anything wrong I'm doing? I've tried putting the release and retaining the <strong>optionsArray</strong> but the result is the same. I also tried to copy the content of the <strong>composedBufferArray</strong> into the the <strong>optionsArray</strong>. I tried putting</p> <pre><code>optionsArray = [_client composedStringArray:self]; </code></pre> <p>into the init method. The result is the same for all the cases. </p> <p>Please help. I couldn't solve this problem for last two days. Please help.</p> <p>Sorry I couldn't post a image or a link as I'm totally new in Stack Overflow.</p> <p>Regards,</p> <p>Raiyan</p>
 

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