小程序动态添加class及调接口传递多个参数

1.动态添加class

<view class="step2 {{indication == 2 ?'on':''}}">

<view class='tc left'>

<view>喷洒泡沫</view>

<view>(min)</view>

</view>

<view class='right'>{{foam}}</view>

</view>

2.传递多个参数

第一个参数用的是？   后面用的是&    ?orderid=' + e.currentTarget.dataset.orderid

 <view class="btn-area" bindtap='carWashOrder' data-washing="{{washing}}" data-foam="{{foam}}" data-cleaner="{{cleaner}}" data-all_money="{{all_money}}" data-orderid='{{orderid}}'>

 carWashOrder:function(e){
    var that = this;
    wx.navigateTo({
      url: '/pages/carWashOrder/carWashOrder?orderid=' + e.currentTarget.dataset.orderid + "&washing=" + e.currentTarget.dataset.washing + "&foam=" + e.currentTarget.dataset.foam + "&cleaner=" + e.currentTarget.dataset.cleaner  ,
    })
  }

3.请求接口成功  页面渲染一定要加that.setData({})

var parma = {
          orderid: that.data.orderid,
          token: app.globalData.token ,
          off_on: that.data.off_on
        }
        // ajax
        app.requsetUrl('/Order/settlement', parma, function (res) {
          if(res.data.code == ){
            console.log(JSON.stringify(res))
            that.setData({
              all_money: that.data.all_money//结算金额
            })
          }
        })