CODEWITHSUNDEEP
iosswiftuinavigationcontrolleruinavigationbar
Peter Pik
Peter Pik

Reputation: 11193

Setting a image as backButton

I'm trying to set a BackButton as a image instead of the standard text and backArrow, but whatever i do it wont work. i've tried hiding the BackButton and setting leftBarbutton, but then the backButton is not hidng and i've tried setting backBarButtonItem as below, but still only appearing the standard backButton. What am i doing wrong?

    var backButton:UIBarButtonItem = UIBarButtonItem(image: UIImage(named: "left"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("goBack:"))

    self.navigationController?.navigationItem.backBarButtonItem = backButton

tried now

    var backButton:UIBarButtonItem = UIBarButtonItem(image: UIImage(named: "left"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("goBack:"))

    self.navigationController?.navigationItem.leftBarButtonItem = backButton

Upvotes: 0

Views: 172

Answers (2)

Babu Lal
Babu Lal

Reputation: 136

  1. Take a UIButton and set its Image, frame and add target.

    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *backButtonImage = [UIImage imageNamed:@"MyImage"];
[backButton setImage:backButtonImage forState:UIControlStateNormal];
[backButton setImage:backButtonImage forState:UIControlStateHighlighted];
backButton.frame = CGRectMake(0, 0, 40, 40);
[backButton addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];

  2. Using this backButton define a UIBarButtonItem and assign that to self.navigationItem.leftBarButtonItem

    UIBarButtonItem* barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
self.navigationItem.leftBarButtonItem = barButtonItem;

Upvotes: 1

stefreak
stefreak

Reputation: 1450

You should'nt use self.navigationController?.navigationItem but self.navigationItem directly!

But anyway, for more background:

When this navigation item is immediately below the top item in the stack, the navigation controller derives the back button for the navigation bar from this navigation item.

(From Apples documentation of backBarButtonItem )

That means, the backBarButton item property can only change the back button appearance of the next viewController you push onto your UINavigationController's stack.

To achieve the desired effect, you can

  1. set a leftBarButtonItem (this should automatically hide the back button) and call self.navigationController.popViewControllerAnimated(true) manually when it's clicked

or

  1. use the UINavigationBar.appearance() API.

Upvotes: 0

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