Swift 字符串转字典

// MARK: 字符串转字典

    static func stringValueDic( _ str: String) -> [String : Any]?{

        let data = str.data(using: String.Encoding.utf8)

        if let dict = try? JSONSerialization.jsonObject(with: data!,

                        options: .mutableContainers) as? [String : Any] {

            return dict

        }

        return nil

    }