CODEWITHSUNDEEP
iphoneobjective-ciosstoryboarduinavigationbar
JDev
JDev

Reputation: 2551

IPhone: NavigationBar BackNaviItem onClick-event?

In the transition between Storyboards generated NavigationBar. How do I assign onClick-function for BackNaviItem?

thanks

Navigationbar have generated automatically.

I write like this.

[[self.navigationItem backBarButtonItem] action:@selector(backNaviItemSenderEvent) forControlEvents:UiControlEvenTouchUpInside];

Does not work. (

Upvotes: 2

Views: 1896

Answers (2)

Cocoanetics
Cocoanetics

Reputation: 8247

You can put any code that you need to perform on the back action in the viewWillDisappear of your view controller that is being dismissed.

Alternatively you could set the navigationItem.leftBarButtonItem with e.g. a Save button and link that to an outlet in your VC. The back button is only shown if the leftBarButtonItem is nil.

Upvotes: 1

Paras Joshi
Paras Joshi

Reputation: 20541

Just Add this custom Button on UINavigationBar , just override this button on BackButton and you can perform any action with click event just try it..

- (void)viewDidLoad
{
        ///write your code

        UIImage *backButtonImage = [UIImage imageNamed:@"backbutton.png"];
        UIButton *backbutton = [UIButton buttonWithType:UIButtonTypeCustom];
        //[backbutton setImage:backButtonImage forState:UIControlStateNormal];//this line for set only image on button
        [backbutton setBackgroundImage:backButtonImage forState:UIControlStateNormal];
        [backbutton setTitle:@"Back" forState:UIControlStateNormal];
        backbutton.frame = CGRectMake(0, 0, backButtonImage.size.width, backButtonImage.size.height);
        UIBarButtonItem * back = [[UIBarButtonItem alloc] initWithCustomView:backbutton];
        [backbutton addTarget:self action:@selector(yourButton_Clicked) forControlEvents:UIControlEventTouchUpInside];
        self.navigationItem.leftBarButtonItem = back;
}

and when you click on this left button bellow method called...

-(void)yourButton_Clicked{
      ///Write your code here...
}

Upvotes: 0

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