swift 通知+ Ex.swift

Posted 2021-05-19

protocol NotificationKey: RawRepresentable, CustomStringConvertible {}

protocol NotificationCenterAbility {
    associatedtype T: NotificationKey
    static var center: NSNotificationCenter { get }
    static func post(key: T, object: AnyObject?, userInfo: [NSObject : AnyObject]?)
}

extension NotificationCenterAbility {
    static var center: NSNotificationCenter {
        return NSNotificationCenter.defaultCenter()
    }
    
    static func post(key: T, object: AnyObject? = nil, userInfo: [NSObject : AnyObject]? = nil) {
        center.postNotificationName(key.description, object: object, userInfo: userInfo)
    }
    
    static func addObserver(observer: AnyObject, selector aSelector: Selector, key: T, object: AnyObject? = nil) {
        center.addObserver(observer, selector: aSelector, name: key.description, object: object)
    }
        
    static func removeObserver(observer: AnyObject, key: T, object: AnyObject? = nil) {
        center.removeObserver(observer, name: key.description, object: object)
    }
}