nsobject+notification

public extension NSObject {
	func removeNotifications() {
		NSObject.cancelPreviousPerformRequests(withTarget: self)
		NotificationCenter.default.removeObserver(self)
	}

	func addNotification(_ aSelector: Selector, key: String) {
		NotificationCenter.default.addObserver(self, selector: aSelector, name: NSNotification.Name(rawValue: key), object: nil)
	}

	func addNotification(_ aSelector: Selector, name: Notification.Name) {
		NotificationCenter.default.addObserver(self, selector: aSelector, name: name, object: nil)
	}

	var className: String {
		guard let name = NSStringFromClass(type(of: self)).components(separatedBy: ".").last else { return "" }
		return name
	}

	fileprivate struct AssociatedKeys { static var name = "name" }

	func getAssociate(_ key: String) -> Any? {
		guard let dic = objc_getAssociatedObject(self, &AssociatedKeys.name) as? [String: Any] else { return nil }
		return dic[key]
	}

	func setAssociate(_ key: String, value: Any?) {
		var dic = (objc_getAssociatedObject(self, &AssociatedKeys.name) as? [String: Any]) ?? [:]
		dic[key] = value
		objc_setAssociatedObject(self, &AssociatedKeys.name, dic, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
	}

}

public extension Notification {

	static func post(key: String, object anObject: Any?) {
		NotificationCenter.default.post(name: Notification.Name(rawValue: key), object: anObject)
	}
	
	static func post(name: Notification.Name, object anObject: Any?) {
		NotificationCenter.default.post(name: name, object: anObject)
	}

}