Databases
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POAdd a row to a TableView from a Detail view
 

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  1. POAdd a row to a TableView from a Detail view
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    <p>So I have a tableView and a detail view. I have an extra row in my tableView to "Add" a record. When I click on the new button I send a nil object to my detail view which is the same that I use for editing an existing row. I use the following code for that:</p> <pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { new = NO; NSUInteger row = [indexPath row]; SavedCarDetailController *detailController = [[SavedCarDetailController alloc] initWithNibName:@"SavedCarDetailController" bundle:nil]; if(indexPath.row &gt;= [listOfCars count]){ NSLog(@"New Car"); detailController.car = nil; new = YES; } else { new = NO; detailController.car = [listOfCars objectAtIndex:row]; } detailController.managedObjectContext = self.managedObjectContext; [self.navigationController pushViewController:detailController animated:YES]; [detailController release]; } </code></pre> <p>When I save my core data stuff I execute this in my detailController</p> <pre><code> - (void)viewWillDisappear:(BOOL)animated { NSError * e = nil; if(self.New){ NSLog(@"New Car Saving"); NSManagedObject * obj = [NSEntityDescription insertNewObjectForEntityForName:@"Cars" inManagedObjectContext: managedObjectContext]; [obj setValue:Name.text forKey:@"name"]; [obj setValue:Year.text forKey:@"Year"]; [obj setValue:Notes.text forKey:@"Notes"]; } else { NSLog(@"Updating exiting car"); car.Name = Name.text; car.Year = Year.text; car.Notes = Notes.text; } [managedObjectContext save:&amp;e]; if(e){ NSLog(@"Error occurred, %@", e); } if(self.New){ } else { // [self.parentViewController.tableView reloadData]; } } </code></pre> <p>Then I update my tableView with reloadData but it only updates the modified feild</p> <pre><code>- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; if(new){ NSInteger row = [listOfCars count]; NSLog(@" row %i", row); NSArray *paths = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:row inSection:0]]; //NSArray * foo = [NSArray arrayWithArray:&lt;#(NSArray *)array#&gt; [self.tableView beginUpdates]; [self.tableView insertRowsAtIndexPaths:paths withRowAnimation:UITableViewRowAnimationFade]; [self.tableView endUpdates]; new = NO; } //This only works with "changed data" not new rows. [self.tableView reloadData]; } </code></pre> <p>This saves new rows to my database but the new row never appears. The InsertRows actually coreDumps on me. I am pretty sure I need to use the insertRowsAtIndexPaths but I have no clue where to put it so it will be executed once I have added the object to CoreData. Any ideas? </p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USJoe Coder
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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