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wx.requestPayment的fail在真机测试中未触发。以下为实例代码

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wx.request({

      url: '*****************',
      data: {
        openid: openidGet,
        out_trade_no: that.data.OrderNumber,
        vipmeal_name: that.data.name,
        price: that.data.payment
      },
      method: 'POST', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
      header: {
        'content-type': 'application/x-www-form-urlencoded'
      },
      success: function (res) {
        //返回正确的预支付交易后调起支付
        var appid = res.data.Wechat.PayForm.APPID;
        var timeT = res.data.Wechat.PayForm.Timestamp;
        var noceStrT = res.data.Wechat.PayForm.Noncestr;
        var prepayIDT = res.data.Wechat.PrepayID;
        wx.requestPayment({
          appId: appid,
          timeStamp: timeT,
          nonceStr: noceStrT,
          package: "prepay_id=" + prepayIDT,
          signType: 'MD5',
          paySign: res.data.Wechat.PayForm.Sign,
          success: function (res) {
            // success
            wx.redirectTo({
              url: '../my/paySuccess/paySuccess?orderNumber=' + that.data.OrderNumber
            })
          },
          fail: function (res) {
            // fail
            console.log("-----fail-----",res)
            wx.redirectTo({
              url: '../my/payDefeat/payDefeat?orderNumber=' + that.data.OrderNumber + '&payment=' + that.data.payment
            })
          },
          complete: function (res) {
            // complete
          }
        })
      },
      fail: function (res) {
        // fail
      },
      complete: function (res) {
        // complete
      }
    });