小程序开发之云函数的使用教程详解

exports.add = async (event, context, cb) => {
  return event.x + event.y
}

wx.cloud.callFunction({
  // 要调用的云函数名称
  name: 'add',
  // 传递给云函数的event参数
  data: {
    x: 1,
    y: 2,
  }
}).then(res => {
  // output: res.result === 3
}).catch(err => {
  // handle error
})

<view class="data"><input placeholder="请输入a" focus="true" bindinput="binda"></input></view>
<view class="data"><input placeholder="请输入b" focus="true" bindinput="bindb"></input></view>
<view class="partition"></view>
<view class="arithmetic"><view bindtap='add'><button size="mini" class='bt' >+</button></view><view>{{add}}</view></view>
<view class="arithmetic"><view  bindtap='sub'><button size="mini" class='bt' >-</button></view><view>{{sub}}</view></view>

const app = getApp()
Page({
  data: {
    a:1,
    b:1,
   add:'',
   sub:''
  },

  onLoad: function() {
    
  },

binda:function(e){
 this.setData({
   a: e.detail.value
 })
    console.log(e.detail.value)
  },

  bindb: function (e) {
    this.setData({
      b: e.detail.value
    })
    console.log(e.detail.value)
  },

  add:function(e){
    var that=this;
    wx.cloud.callFunction({
      // 云函数名称
      name: 'add',
      // 传给云函数的参数
      data: {
        a: that.data.a,
        b: that.data.b,
      },
      success: function (res) {
        console.log(res.result.add) 
        var c = res.result.add
        that.setData({
          add: "a+b=" + c
        })
      },
      fail: console.error
    })
  },

  sub: function (e) {
    var c = Number(this.data.a) - Number(this.data.b)
    console.log(c)
    this.setData({
      sub: "a-b=" + c
    })
  }
})

exports.main = async (event, context) => {
return{add:Number(event.a)+Number(event.b)}
}