IOS: How to Reset Action of UIBarButtonItem after it has been created? - ios

Question

I have some code that creates barbuttonitem Edit and if you click it and begin editing, changes the button to Done.
When I first create the button I set its action to Edit. However, once the user is editing, I want to change the action of the renamed button to Save.
I thought I had save firing but somewhere along the line it stopped working possibly when I added a method in the middle to enable and disable the button.
Can anyone suggest the proper way to change the action of a bar button item?
Here is my code:
//code to create button which sets action to gotoEdit method
UIBarButtonItem *editButton = [[UIBarButtonItem alloc] initWithTitle:#"Edit" style:UIBarButtonItemStylePlain target:self action:#selector(gotoEdit)];
self.navigationItem.rightBarButtonItem = editButton;
}
-(void) gotoEdit {
self.navigationItem.rightBarButtonItem.title = #"Done";
_editButton.target = self;
_editButton.action = #selector(save);//changes action to save method
//some other code to make a textview editable, change its background color and so forth.
}
-(void) save {
NSLog(#"save method firing");
}
//I added the following methods at about the same time the save method stopped firing but not sure if they are related. (Probably not but including them anyway.)
//detect change on screen
- (void)textViewDidChange:(UITextView *)textView{
self.didChange=YES;
[self updateSaveButton];
}
-(void) updateSaveButton
{
self.editButton.enabled = (_didChange == TRUE);
}

Answer 1

It is better to use a bool instead of adding and removing the button's action.
-(void) gotoEdit {
if(!isEditing){
// Prep for editing
self.navigationItem.rightBarButtonItem.title = #"Done";
isEditing = true;
}else{
// Prep for saving
self.navigationItem.rightBarButtonItem.title = #"Edit";
isEditing = false;
}
}
For future reference you can remove a button's selector like this:
[_editButton removeTarget:self
action:#selector(gotoEdit)
forControlEvents:UIControlEventTouchUpInside];