FirebaseStorage Framework Reference

FIRStorageObservableTask

@interface FIRStorageObservableTask : FIRStorageTask

An extended StorageTask providing observable semantics that can be used for responding to changes in task state. Observers produce a StorageHandle, which is used to keep track of and remove specific observers at a later date.

• -observeStatus:handler:

  Observes changes in the upload status: Resume, Pause, Progress, Success, and Failure. \param status The StorageTaskStatus change to observe.

  \param handler A callback that fires every time the status event occurs, containing a StorageTaskSnapshot describing task state.

  returns: A task handle that can be used to remove the observer at a later date.

  Declaration

  Objective-C

  - (NSString *_Nonnull)
      observeStatus:(enum FIRStorageTaskStatus)status
            handler:(void (^_Nonnull)(FIRStorageTaskSnapshot *_Nonnull))handler;

• -removeObserverWithHandle:

  Removes the single observer with the provided handle. \param handle The handle of the task to remove.

  Declaration

  Objective-C

  - (void)removeObserverWithHandle:(NSString *_Nonnull)handle;

• -removeAllObserversForStatus:

  Removes all observers for a single status. \param status A StorageTaskStatus to remove all listeners for.

  Declaration

  Objective-C

  - (void)removeAllObserversForStatus:(enum FIRStorageTaskStatus)status;

• -removeAllObservers

  Removes all observers.

  Declaration

  Objective-C

  - (void)removeAllObservers;