didChangeValue(forKey:)
Informs the observed object that the value of a given property has changed.
Declaration
func didChangeValue(forKey key: String)Parameters
- key:
The name of the property that changed.
Discussion
Use this method when implementing key-value observer compliance manually to inform the observed object that the value at key has just changed. Calls to this method are always paired with a matching call to willChangeValue(forKey:).
Special Considerations
You rarely need to override this method in subclasses, but if you do, be sure to call super.