Notification 书写简化

简化书写

extension Notification.Name {

    public static let KingfisherDidCleanDiskCache = Notification.Name.init("com.onevcat.Kingfisher.KingfisherDidCleanDiskCache")
}

NotificationCenter.default.post(name: .KingfisherDidCleanDiskCache, object: self, userInfo: [KingfisherDiskCacheCleanedHashKey: cleanedHashes])