Making UITableviewCells deletable

Question

How are UITableView cells made to be able to be deleted by users?

Answer 1

Take a look at the table view data source delegate method -tableView:commitEditingStyle:forRowAtIndexPath:.

You override this method in your table view delegate (usually your table view controller) and put your deletion logic here.

For example, you can call a UIAlertView to ask the user to confirm the deletion, or just manipulate the data model directly, removing the object from your table view's data source.

Answer 2

A quick example would be:

// create a mutable array to manage your table data
NSMutableArray *tableList;

@property (nonatomic, retain) NSMutableArray *tableList;

in your viewDidLoad method you can initialize it with data (you should check if tableList is nil first though)

NSString *path = [[NSBundle mainBundle] pathForResource:@"TableData" ofType:@"plist"];
NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:path];

self.tableList = array; 
[array release];

then in the implementation file, you implement this delegate method

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

    NSUInteger row = [indexPath row]; 
    [self.tableList removeObjectAtIndex:row]; 

    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];

}

you can then toggle editing mode via

[self.tableView setEditing:!self.tableView.editing animated:YES];