Question

I have a tableview and navigation bar on the top.

I have a Edit button on the left of my navigation bar with the following line of code.

self.navigationItem.leftBarButtonItem = self.editButtonItem;

When i click on the edit button, it changes to done button. All is fine so far.

Where do i add code, if i want to do a small operation when the Done button is clicked.?

Answer 1

The button stops committing the changes to your controller class once you override it’s default action with self.editButtonItem.action = @selector(editClicked:);

What you should do is override UIViewController’s setEditing method in your own controller class:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    [super setEditing:editing animated:animated];

    if(editing == YES) 
    {
        // Your code for entering edit mode goes here
    } else {
        // Your code for exiting edit mode goes here
    }
}

You also need to set your UIBarButtonItem to “Edit” in storyboard or if you prefer doing it in code use the following:

- (void)viewDidLoad {
    [super viewDidLoad];

    self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

editButtonItem is a helper property already set by the system for your comfort.