ios - change Table to Edit mode and delete Rows inside a normal ViewController

Question

I just inserted a table into a normal UIViewController and connected the delegate and source components with the file's owner. Everything works fine when i insert data into the table rows. but now i am trying to find out how rows can be deleted.

I just looked at a lot of other posts, but couldn't find the right solution.

I tried to insert a asseccory button for each row in the table:

cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;

i even found the method that will be called when the accessory button is pressed:

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath{

    NSLog(@"Accessory pressed");

    //[self tableView:tableView willBeginEditingRowAtIndexPath:indexPath];

    //[self tableView:nil canEditRowAtIndexPath:indexPath];
    //[self setEditing:YES animated:YES];
}

Inside the log the message is printed, but no one of the methods that i tried to call (the commented one) did change the view to the edit mode. How can i solve this problem?

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Here is a Screenshot of the UIViewController. I haven't integrated a navigationController.

Answer 1

In order to enable edit mode for table view, you can call edit method on UITableView as,

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

You have to implement tableView:commitEditingStyle:forRowAtIndexPath: method to enable the deleting of rows. In order to delete the rows you need to use deleteRowsAtIndexPaths:withRowAnimation: method.

For eg:-

self.navigationItem.rightBarButtonItem = self.editButtonItem;//set in viewDidLoad

- (void)setEditing:(BOOL)editing animated:(BOOL)animated { //Implement this method
    [super setEditing:editing animated:animated];
    [self.tableView setEditing:editing animated:animated];
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { //implement the delegate method

  if (editingStyle == UITableViewCellEditingStyleDelete) {
    // Update data source array here, something like [array removeObjectAtIndex:indexPath.row];
    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
  }   
}

For more details check the apple documentation here.