微信支付第一步 post参数如何转化成xml 我用okhttp传参和httpClient转化xml都不成功
希望指点一二，谢谢我的qq邮箱：[email protected]，期待回复

服务器说在服务器这边帮我完成数据的签名，我只需要请求服务器接口然后拿到调用支付请求的所有参数，请问一下拿到之后是否还需要在本地进行一次签名呢？

IOS WeChat pay 3.0, click on the payment of the test, skip to WeChat pay page, in the middle is only an "ok" button, click later returned to the original APP, prompt "payment failure, retcode = 2", to some, sign the signature. My operation is the first time, send a request to obtain prepay_id, get id generated after sign signature, finally send the req request, what is the cause of the error? Where is the need to modify?