Notification center observers for multiple notifications with block

NotificationObserver.swift

extension UIViewController {
    /**
     Adds an observer with block for a notification.

     - returns: A handle to remove observer.
     - parameters:
        - name: Notification name.
        - object: Specify object you only want to listen to.
        - block: Block to run when notification observed.

     - Important:
     The block is run synchronously on the main thread.
     To unregister observations, you pass the object returned by this method to removeObserver(_:).
     */
    func observe(_ name: Notification.Name, for object: Any? = nil, with block: @escaping (Notification) -> Void) -> NSObjectProtocol {
        return NotificationCenter.default.addObserver(forName: name, object: object, queue: .main, using: block)
    }

    /**
    Adds an observer with block for multiple notifications.

    - returns: Array of handles for removing observers.
    - parameters:
        - names: Notification names (divided by comma).
        - object: Specify object you only want to listen to.
        - block: Block to run when notification observed.

     - Important:
     The block is run synchronously on the main thread.
     To unregister observations, you pass the object returned by this method to removeObserver(_:).
    */
    func observe(_ names: Notification.Name..., for object: Any? = nil, with block: @escaping (Notification) -> Void) -> [NSObjectProtocol] {
        var observers:[NSObjectProtocol] = []
        names.forEach { observers.append(observe($0, for: object, with: block)) }
        return observers
    }
}