Not working with storyboard

[VasanthkumarVelusamy]

Badge properties are not added when using with segmented control in storyboard. Only the badge text appears without any circle background.

[johncpang]

When used with Storyboard, M2DSegmentedControl:initWithItems: is never called. So, the badgeViews array is nil. To resolve, we must recall those missing codes (as following):

self.badgeViews = [NSMutableDictionary new];
[self addTarget:self action:@selector(valueChanged:) forControlEvents:UIControlEventValueChanged];
[self setBadgeBackgroundColor:[UIColor redColor]];
[self setBadgeTextColor:[UIColor whiteColor]];

The last two is straight forward as they are public functions. But the first two are tricky because they are private property/method. So, we need to redeclare them as public (Credit: http://jerrymarino.com/2014/01/31/objective-c-private-instance-variable-access.html).

@interface M2DSegmentedControl()

@property (nonatomic, strong) NSMutableDictionary<NSNumber *, M2DSegmentedControlBadgeView *> *badgeViews;
- (void)valueChanged:(id)sender;

@end

// declare a short cut to the `valueChanged:` as this:
- (void)M2DSegmentedControlValueChanged:(id)sender {
	[(M2DSegmentedControl *)sender valueChanged:sender];
}

Now, redo the missing initialization and call this function from viewDidLoad:

- (void)reinitM2DSegmentedControl:(M2DSegmentedControl *)segmentedControl {
	segmentedControl.badgeViews = [NSMutableDictionary new];
	[segmentedControl addTarget:self action:@selector(M2DSegmentedControlValueChanged:) forControlEvents:UIControlEventValueChanged];
	[segmentedControl setBadgeBackgroundColor:[UIColor redColor]];
	[segmentedControl setBadgeTextColor:[UIColor whiteColor]];
}

[johncpang]

After using it for a while, I found that this library is quite buggy. For example, if I set a badge with nil text (no value), it will be hidden forever. I have to access the badgeView (via the above hack to the supposed private array) to unhidden it before updating the text.

When the viewController is disappears (for example, a navigation controller event), on return, the badges are gone/hidden/invisible. Can't find a way to show them programatically. But user tapping any other tab on the segment control (any except current one), the badges will come back.