sign生成方式

签名生成所需参数:

app_secret，'app_key'，app_key值，'method'，method值，'param_json'，param_json值，'timestamp'，时间戳值，'v'，版本号，app_secret

swift示例代码如下

let param_json = ['token':'access_token值'] 

//转换为json字符串
let paramsJsonStr = (makeJsonStrWith(object: param_json)) as String

var str = String.init().appending('f0c5ccf7d9b775bb8a92664522b03f02')
            .appending("access_token")
            .appending("app_key")
            .appending('106')
            .appending("method")
            .appending('pp.user.login')
            .appending("param_json")
            .appending(paramsJsonStr)
            .appending("timestamp")
            .appending(params["timestamp"] as! String)
            .appending("v")
            .appending(params["v"] as! String)
            .appending('f0c5ccf7d9b775bb8a92664522b03f02');


 //签名所需参数拼接后MD5加密
let md5SignStr = md5StringFromString(str:str)

//生成签名后内容转大写
let sign = md5SignStr.uppercased()