與外站進行數(shù)據(jù)傳輸

    <view class="bt-ok" bindtap="okClick">確定提交</view>

Page({
//確認提交
  okClick: function () {

  var that = this;//此處必須重定義，才能在回調(diào)函數(shù)里使用
      wx.request({   //發(fā)起url請求
        url: 'http://wq.ycwjwl.com/json.php',
        method: 'POST', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
        data: {  //傳遞參數(shù)
          x: 'df so handsome',
          y: '2'
        },
        header: {   //請求方式
          'content-type': 'application/x-www-form-urlencoded'   //post must be this
           //'content-type': 'application/json'     //this for get
        },
        success: function (res) {       //訪問成功之后的返回值     return  data、statusCode、header 
          console.log(res);
         var r = res.data.x;      //獲取json參數(shù)里的x的值
          that.setData({   //異步傳輸數(shù)據(jù)到前端
            toastHidden: false,
            toastTxt: "提交成功",
            rt: r
          });         
        }
      })
      console.log("log:"+this.data.rt);
     }
  })

前后端交互

Page({
 data: {//頁面初始數(shù)據(jù)
    orderList: [],
    total: 0, //總價格   
  },
 onLoad: function(options) {  //自帶的事件   [說明](https://mp.weixin.qq.com/debug/wxadoc/dev/framework/app-service/page.html)
    // Do some initialize when page load.
  },
    //自定義函數(shù)
 returnClick: function () {
    wx.navigateBack();
  },
})

 <view class="cost">總價：<span>￥{{total}}</span></view>
 <view class="bt-return" bindtap="returnClick">返回修改</view>

<view class="orderlist" wx:for="{{orderList}}" wx:key="item.id">     //遍歷一個數(shù)組
      <span>{{item.title}}</span><span style="float:right;">￥{{item.cost}} * {{item.num}}</span>
    </view>

頁面之間傳值

//home
Page({
//提交訂單

  sublimitClick: function (e) {


     var agrs = JSON.stringify(this.data.orderList);//將json數(shù)組轉(zhuǎn)化為get參數(shù)
    wx.navigateTo({
      url: '../order/order?order=' + agrs
    })
  },
})
//order
Page({
// 頁面初始化 options為頁面跳轉(zhuǎn)所帶來的參數(shù)
  onLoad: function (options) {

    //object 轉(zhuǎn) array
    var order = JSON.parse(options.order);  //將get到的json字符串轉(zhuǎn)化為json數(shù)組
    var t_order = [];
    var t_total = 0;
    for (var k in order) {
      if (order[k].num > 0) {
        t_order.push(order[k]);
        t_total = t_total + order[k].cost * order[k].num; //計算總價格
      }
    }

    this.setData({  //與前端進行交互
      orderList: t_order,
      total: t_total
    });

  },
  })