MGLObservable

@protocol MGLObservable

The MGLObservable protocol declares methods that conforming classes should implement should they want to observe low-level events of type MGLEvent. Currently only MGLMapView implements MGLObservable.


                    
                    
                    -subscribeForObserver:events:

Subscribes an MGLObserver to a provided set of event types. MGLObservable will hold a strong reference to an MGLObserver instance, therefore, in order to stop receiving notifications (and to avoid memory leaks), the caller must call unsubscribe with the MGLObserver instance used for the initial subscription.

Declaration

Objective-C

- (void)subscribeForObserver:(nonnull MGLObserver *)observer
                      events:(nonnull NSSet<MGLEventType> *)events;

Swift

func subscribe(for observer: MGLObserver, events: Set<MGLEventType>)

Parameters

`observer`	an MGLObserver
`events`	a set of event types to subscribe to.

View Source on GitHub


                    
                    
                    -unsubscribeForObserver:events:

Unsubscribes an MGLObserver from a provided set of event types.

Declaration

Objective-C

- (void)unsubscribeForObserver:(nonnull MGLObserver *)observer
                        events:(nonnull NSSet<MGLEventType> *)events;

Swift

func unsubscribe(for observer: MGLObserver, events: Set<MGLEventType>)

Parameters

`observer`	an MGLObserver
`events`	a set of event types to unsubscribe from.

View Source on GitHub


                    
                    
                    -unsubscribeForObserver:

Unsubscribes an MGLObserver from all events (and release the strong reference).

Declaration

Objective-C

- (void)unsubscribeForObserver:(nonnull MGLObserver *)observer;

Swift

func unsubscribe(for observer: MGLObserver)

Parameters


                                  observer

an MGLObserver

View Source on GitHub