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POIphone programming: Multiple UITableViews reading from the same source?
 

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    <p>This question is related to <a href="https://stackoverflow.com/questions/254354/uitableview-issue-when-using-separate-delegate-datasource">UITableView issue when using separate delegate/dataSource</a>, though I have a different problem. I'm just starting to learn iPhone programming.</p> <p>Basically I have one main view with a table. On the event of a cell click, a sub view with another table is shown.</p> <p>The datasource and delegate for the main view's table are set as files' owner, and I have added the necessary code in there to handle the table data and everything is fine. But, when the second table in the sub-view seems to crash the application, I did the same thing, set the datasource and delegate to the file's owner and repeated the same procedure as for the main view's table. I have no idea why this is happening.</p> <p>The sub-view has its only nib/xib file and its own outlet. If i do not attach any datasource to the subview's table, it takes the data from the main view's table; I don't understand why that is, since I have set the datasource to be the file's owner.</p> <p>For example: the <code>FirstView</code> controller has a table <code>FirstTable</code>, the datasource and delegate are set to the owner of <code>Files</code>. I added the following in <code>FirstView.m</code>:</p> <pre><code>- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 4; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"LibraryListingCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } cell.textLabel.text =@"Table Cell"; return cell; } </code></pre> <p>Everything works perfectly. The moment I repeat this with a second table and a second view, the application crashes saying</p> <pre><code>reason: '-[UISectionRowData tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x69188d0' </code></pre> <p>I have done exactly the same for second table: implemented <code>numberOfRowsInSection</code> and <code>cellForRowAtIndexPatch</code> inside <code>secondview.m</code> and set the second table's delegate and datasource to the file's owner. If I remove the delegate and datasource for the second table, the application doesn't crash but has an empty table in the second view.</p> <p>Any suggestions? or am I missing some key concept here ?</p>
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