Two actions for one UIBarButtonItem? - ios

Question

I have an edit button, that I obtained through self.editButtonItem and I have set it as self.navigationItem.leftBarButtonItem, such that when it is pressed, a UITableView begins editing and it turns into a "Done" button. When pressed again the view stops editing and the button returns to its normal state.
I would also like an "add" button to turn into a "Clear" button with a different action linked to it when the edit button is pressed.
(Much like in the iPhone "Phone" app's favourites tab, just that the plus button turns into a clear button when the Edit button is pressed).
I would really like to obtain the edit action and style etc in this way (self.editButtonItem), but I would also like to have an extra selector linked to the edit button.
How should I go about doing this? I have tried to create a category for UIBarButtonItem, but I don't really know what I should do with that.
Thanks.

Answer 1

To create a button whose title can change, you can do the following:
Define an ivar for the button:
UIBarButtonItem *_btnAddClear;
In viewDidLoad:
_btnAddClear = [[UIBarButtonItem alloc] initWithTitle:#"Add" style:UIBarButtonItemStyleBordered target:self action:#selector(addClearAction:)];
_btnAddClear.possibleTitles = [NSSet setWithObjects:#"Add", #"Clear", nil];
Since you want this button's title to change when the Edit/Done button is tapped, you can add code like the following:
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
[super setEditing:editing animated:animated];
_btnAddClear.title = editing ? #"Clear" : #"All";
}
And lastly, the button handler:
- (void)addClearAction:(UIBarButtonItem *)button {
if (self.editing) {
// perform "clear" action
} else {
// perform "add" action
}
}

Answer 2

Give tag of UIBarButton such like 101;
and in BarButton Method write following
-(void)barButtonMethod
{
UIBarButtonItem * myButton = (UIBarButtonItem *) sender;
if(sender.tag == 101)
{
yourBtn.tag = 102;
// Write Your first action method such like
[self ActionMethod1];
}
else
{
yourBtn.tag = 101;
// Write Your second action method such like
[self ActionMethod2];
}
}

Answer 3

You don't really need a new action for the editButtonItem.
There is a property that tracks if the UIViewController is in editing state.
#property(nonatomic, getter=isEditing) BOOL editing
In order to do what you want, you can implement the following method in your UITableViewController:
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
[super setEditing:editing animated:animated]
//Do your thing
}