微信支付入门教程

本文通过一个简单的微信支付案例介绍使用WeX5开发一个支持微信支付的功能的过程
注意：本文档适合3.1之前版本（包含3.1）,因为3.2开始我们的插件已经支持了微信最新api和最新借口（wechat v3）.所以随之js的api也有小部分变化。
1.新建一个mainActivity.w页面，添加一个按钮.用来点击调用微信支付
2.在mainActivity.w的js文件用引用微信插件

1	`require("cordova!com.justep.cordova.plugin.weixin");`

3.在按钮click事件中添加如下事件代码

Model.prototype.weixinPayBtnClick = function(event) {
  var weixin = navigator.weixin;
  var traceID = justep.UUID.createUUID();
  var traceNo = justep.UUID.createUUID();
  var notifyUrl = "http://www.bex5.com";
  var error = function(msg){
      alert('支付异常：' + msg);
  };
  weixin.generatePrepayId({
              "body" : "支付案例",
              "feeType" : "1",
              "notifyUrl" : notifyUrl,
              "totalFee" : "1",
              "traceId" : traceID,
              "tradeNo" : traceNo
           }, function(prepayId) {
              weixin.sendPayReq(prepayId, function(message) {
              var responseCode = parseInt(message);
              if (responseCode === 0) {
                 alert('支付成功');
              } else {
                error(message);
              }
           }, error);
       }, error);
};

5.3.2之前版本

   Model.prototype.weixinPayBtnClick = function(event) {
    var weixin = navigator.weixin;
    var traceID = justep.UUID.createUUID();
    var traceNo = justep.UUID.createUUID();
    var notifyUrl = "http://www.bex5.com";
    var error = function(msg){
        alert('支付异常：' + msg);
    };
    weixin.getAccessToken(function(accessToken) {
        weixin.generatePrepayId({
            "body" : "支付案例",
            "accessToken" : accessToken,
            "feeType" : "1",
            "notifyUrl" : notifyUrl,
            "totalFee" : "1",
            "traceId" : traceID,
            "tradeNo" : traceNo
        }, function(prepayId) {
            weixin.sendPayReq(prepayId, function(message) {
                var responseCode = parseInt(message);
                if (responseCode === 0) {
                    alert('支付成功');
                } else {
                    error(message);
                }
            }, error);
        }, error);
    }, error);
};