According to this documentation https://developer.apple.com/documentation/mapkit/mkannotationview/1452401-isdraggable if I set an annotation as draggable, I must also implement setCoordinate.
According to this documentation, https://developer.apple.com/documentation/mapkit/mkannotation/1429528-setcoordinate if I implement setCoordinate I must do so in a key-value observing compliant way.
Have any of you experience with this? Would you show me how this is done? How do you write code that is key-value observing compliant?
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