微信小程序开发POST请求

onLoad: function() {
    that = this;
    wx.request( {
      url: "http://op.juhe.cn/onebox/weather/query",
      header: {
        "Content-Type": "application/x-www-form-urlencoded"
      },
      method: "POST",
     //data: { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" },
      data: Util.json2Form( { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" }),
      complete: function( res ) {
        that.setData( {
          toastHidden: false,
          toastText: res.data.reason,
          city_name: res.data.result.data.realtime.city_name,
          date: res.data.result.data.realtime.date,
          info: res.data.result.data.realtime.weather.info,
        });
        if( res == null || res.data == null ) {
          console.error( '网络请求失败' );
          return;
        }
      }
    })
  }