微信端支付

//在支付之前调用一下这个接口
payMoney() {
   var that = this;
   var url = _url + '/order/createOrder'
   var data = {
      userToken: localStorage.userToken,
      orderId: that.orderId
   }
   that.$http.get(url, data)
      .then(function (res) {
         if (res.data.code == '100') {
            res = res.data.data;
            that.payNow(res.payOrderNo, res.orderPay, res.openid, res.attach);//获得返回所需要的一些参数
         }

      });

},
//立即付款
payNow: function (payOrderNo, orderPay, openid, attach) {//

   var that = this;
   var url = _url + '/pay/createOrder';//去创建一个订单,

   var data = {
      body: "会搜商学院", //这个是具体详情
      outTradeNo: payOrderNo, //订单号
      totalFee: orderPay, //总的金额(单位分，一定是整数，不能有小数点)
      openid: openid, //用户的openId
      attach: attach,
   };
   that.$http.jsonp(url, data)
      .then(function (success) {
         console.log(success);
         if (success.data.code == '100') {//返回一些微信想要的参数
            var res = success.data.data
            appId = res.appId;
            paySign = res.paySign;
            timeStamp = res.timeStamp;
            nonceStr = res.nonceStr;
            packageStr = res.packageValue;
            signType = res.signType;
            callpay();
         } else {
            $.alert("支付失败");

         }
      })

   function callpay() {
      if (typeof WeixinJSBridge == "undefined") {
         if (document.addEventListener) {
            document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
         } else if (document.attachEvent) {
            document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
            document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
         }
      } else {
         onBridgeReady();
      }
   }

   function onBridgeReady() {
      WeixinJSBridge.invoke(
         'getBrandWCPayRequest', {
            "appId": appId, //公众号名称，由商户传入
            "paySign": paySign, //微信签名
            "timeStamp": timeStamp, //时间戳，自1970年以来的秒数
            "nonceStr": nonceStr, //随机串
            "package": packageStr, //预支付交易会话标识
            "signType": signType //微信签名方式
         },
         function (res) {
            if (res.err_msg == "get_brand_wcpay_request:ok") {
               //window.location.replace("index.html");
               location.href = "./my_order.html"
               // alert('支付成功');
            } else if (res.err_msg == "get_brand_wcpay_request:cancel") {
               alert('支付取消');
               location.href = "./my_order.html"
            } else if (res.err_msg == "get_brand_wcpay_request:fail") {
               alert('支付失败');
               location.href = "./my_order.html"
            } //使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回    ok，但并不保证它绝对可靠。
         }
      )
   }
},