小编Lia*_*Jie的帖子

我正在编写一个扩展来桥接FirebaseDatabase和Eureka之间的字典值.

private extension Dictionary {
    func firebaseFriendlyDictionary() -> [String: Any?] {
        return self.map({ (key: String, value: Any?) -> (String, Any?) in
            if value is NSDate {
                return (key, (value as! NSDate).timeIntervalSince1970)
            }
            return (key, value)
        })
    }
}

但是当我尝试构建时,我会抛出此错误:

map produces '[T]', not the expected contextual result type '[String: Any?]'