Is something like this possible?
Observe SearchUtil().getSearchList().count
so whenever the count changes or equals to a specific int value(SearchUtil().getSearchList().count == 0
) run @objc func OnAppBecameActive()
NotificationCenter.default.addObserver(self, selector: #selector(OnAppBecameActive), name: SearchUtil().getSearchList().count, object: nil)
CodePudding user response:
Yes, there are several ways to do this. The thing you want to observe needs to be a property, not the outcome of an expression. If this is (or can be) an NSObject, you can use Key-Value Observing. If not, you can make this a @Published
property and set up a pipeline that processes each change.