The value cannot be updated immediately

[tooodooo]

swift code: self.navigationItem.rightBarButtonItem?.badgeValue = "\(count)"

First time it can be updaed immediately. When the value changed the view only be updated after a few seconds.

It updated after about 7 seconds in rootviewconroller. But it even doen't work in pushed viewcontroller when the value changed.

[tooodooo]

My mistake, message reception is asynchronous communication.

DispatchQueue.main.async { [weak self]() -> Void in self?.navigationItem.leftBarButtonItem?.badgeValue = "\(count)" }

it's okay.