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POiPhone dev: editing grouped UITableView
 

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  1. POiPhone dev: editing grouped UITableView
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    <p>We are about to submit an application to the App store and we have encountered a very odd error when deleting rows and sections in a table. </p> <p>So far, and for compatibility shake we've been linking with 2.0 (so that any iPhone could run our code).</p> <p>For that scenario, we have a group table that allows removing items and this is how we handle item removal:</p> <pre><code>- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the row from the data source NSMutableArray* sect = (NSMutableArray*)[tableContents objectAtIndex:indexPath.section]; [sect removeObjectAtIndex:indexPath.row]; [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES]; //if the section is empty remove it if ([sect count] == 0){ [tableContents removeObjectAtIndex:indexPath.section]; [tableView deleteSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade]; } [tableView reloadData]; } } </code></pre> <p>This little code works quite well but we have a problem whit section titles. When you delete the last row (the last row left) in a section, that section title remains in the view, floating in the middle of nowhere.</p> <p>What are we missing?</p> <p>Thanks in advance</p> <h2>Gonso.</h2> <p>After adding beginUpdate/endUpdates I got a EXC_BAD_ACCES and this output in the console:</p> <pre><code>#0 0x30beae79 in -[UITableViewRowData rectForFooterInSection:] () #1 0x30a9f02d in -[UITableView(_UITableViewPrivate) _updateWithItems:withOldRowData:oldRowRange:newRowRange:] () #2 0x30a9a541 in -[UITableView(_UITableViewPrivate) _endCellAnimations] () #3 0x0000276a in -[RootViewController tableView:commitEditingStyle:forRowAtIndexPath:] (self=0x5248c0, _cmd=0x30c620b0, tableView=0x528c40, editingStyle=UITableViewCellEditingStyleDelete, indexPath=0x52e6e0) at /Users/MacAdmin/Documents/ws/LabTest/TableViewDeletes/Classes/RootViewController.m:135 #4 0x30a9886c in -[UITableView(UITableViewInternal) animateDeletionOfRowWithCell:] () #5 0x30b06d40 in -[UIRemoveControl _doRemove:] () #6 0x30a4eee6 in -[UIApplication sendAction:to:from:forEvent:] () #7 0x30ab0d36 in -[UIControl sendAction:to:forEvent:] () #8 0x30ab11fe in -[UIControl(Internal) _sendActionsForEvents:withEvent:] () #9 0x30ab0544 in -[UIControl touchesEnded:withEvent:] () #10 0x30a7dc73 in -[UIScrollView touchesEnded:withEvent:] () #11 0x30a96a9f in -[UITableView touchesEnded:withEvent:] () #12 0x30a67917 in -[UIWindow sendEvent:] () #13 0x30a56fff in -[UIApplication sendEvent:] () #14 0x30a561e0 in _UIApplicationHandleEvent () #15 0x31565dea in SendEvent () #16 0x3156840c in PurpleEventTimerCallBack () #17 0x9200d615 in CFRunLoopRunSpecific () #18 0x9200dcf8 in CFRunLoopRunInMode () #19 0x31566600 in GSEventRunModal () #20 0x315666c5 in GSEventRun () #21 0x30a4eca0 in -[UIApplication _run] () #22 0x30a5a09c in UIApplicationMain () #23 0x00001fb0 in main (argc=1, argv=0xbfffee88) at /Users/MacAdmin/Documents/wsPogo/LabTest/TableViewDeletes/main.m:14 </code></pre> <hr> <p>This is the final code, working if you link for 2.0 ONLY.</p> <pre><code>if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the row from the data source NSMutableArray* sect = (NSMutableArray*)[tableContents objectAtIndex:indexPath.section]; [sect removeObjectAtIndex:indexPath.row]; //if its the last row left in the section, just delete the section. //if the section is empty remove it if ([sect count] == 0){ [tableContents removeObjectAtIndex:indexPath.section]; [tableView deleteSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade]; } else { //section is not empty, just remove the row [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES]; } [tableView reloadData]; } </code></pre> <p>Thanks!</p>
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