About iOS WeChat pay 3.0 errors, Help~~

[mangyule]

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?

[qiaovc]

你好，我总是调起支付失败是什么原因呢，PayReq的值我都传了

[Conan-sping]

我只传了 partnerId,prepayId,package, nonceStr,sign,timeStamp,这几个值 是成功的,