UIBarButtonItem-Badge for iOS

Question

I am using this control for showing badge on barbuttonitem. It works fine for the first controller or root controller in navigation controller stack. While pushing to another controller, I tried to show badge and I cannot see any effect there.

This question is rather brief, and I wonder - whilst not being a iOS dev - whether it does not show readers what you have tried. Would you add the relevant part of your code? — halfer, Jan 05 '16 at 12:28

score 2 · Answer 1 · answered Jul 06 '16 at 00:20

2

You should first time set badgeValue in viewDidLayoutSubviews. In this case it'll appear and don't blink, like if you set it in viewDidAppear:

    - (void)viewDidLayoutSubviews {
        barButton.badgeValue = @"5";
    }

answered Jul 06 '16 at 00:20

Igor

12,165
4
57
73

I moved `navRightButton = [[UIBarButtonItem alloc] init]; self.navigationItem.rightBarButtonItem = navRightButton; self.navigationItem.rightBarButtonItem.badgeValue = @"1";` to viewDidLayoutSubviews. This solved my problem. – Joeful6 Aug 12 '16 at 09:51

score 0 · Answer 2 · answered Jun 30 '18 at 09:59

Setting navigationItem in viewDidLayoutSubviews is not recommended because it is not semantic.

The key to your problem is that the badge view is added to [UIBarButtonItem valueForKey:@"view"], but when UIBarButtonItem is initialized, valueForKey:@"view" doesn't exist yet, so adding a badge fails.

I suggest you try QMUIBadge, it can solve your problem.

UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] init];
rightItem.qmui_badgeInteger = 1;// number
rightItem.qmui_badgeString = @"99+";// or string

// setRightBarButtonItem any time
self.navigationItem.rightBarButtonItem = rightItem;

UIBarButtonItem-Badge for iOS

2 Answers2

Linked