ObserverManager

Closure Support and automatic deregistering for Key Value Observing in Swift.

Requirements

This version of ObserverManager is meant to be used with Swift 3.0

For Swift 2 use Version 0.1.0

Usage

import Foundation
import ObserverManager

class SomeObservingClass {

    let foo: Foo
    let observerManager = ObserverManager()

    init(foo: Foo) {
        self.foo = foo
        
        observerManager.registerObserver(object: foo, keyPath: "bar") { bar in
        	// Do stuff
        	[...]
        }
    }
}

Interface

/**
A class that can be used to sign up for Key-Value Observing by
passing a Swift closure.

Every object, that uses KVO should have its own NotificationManager.
All observers are automatically deregistered when the object is deallocated.
*/
public class ObserverManager : NSObject {

/**
Registers a new observer for a given object and keypath.

- parameter object:  The object to observe
- parameter keyPath: The keyPath to observe
- parameter block:   The block that is called when the value changed. Gets called with the new value.
*/
open func registerObserver(object: NSObject, keyPath: String, block: @escaping (_ value: NSObject) -> ())


/**
Removes all observers that observe the given keypath on the given object.
*/
open func deregisterObservers(object: NSObject, keyPath: String)

/**
Removes all observers that observe any keypath on the given object.
*/
open func deregisterObservers(object: NSObject)

/**
Removes all observers that observe any keypath on any object.
*/
open func deregisterAllObservers()

}

Installation

ObserverManager is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "ObserverManager"

Author

Tim Bodeit, tim@bodeit.com

License

ObserverManager is available under the MIT license. See the LICENSE file for more info.