小程序——父组件向子组件传值

1.首先需要在父组件中调用子组件，并在子组件的属性中写上传值的数据
这是父组件的wxml界面，其中find_all_teachers为子组件，分别传值teacher_list

<find_all_teachers teacher_list="{
    
    {teacher_list}}"></find_all_teachers>

2.在子组件的find_all_teachers.json中加入

{
    
    
  "usingComponents": {
    
    },
  "component": true
}

父组件的json中加入

{
    
    
  "usingComponents": {
    
    
    "find_all_teachers": "/pages/student/find_all_teachers"
  }
}

3.子组件find_all_teachers.js中加入properties，properties中的名字即为之前父组件传值写的名字teacher_list

const app = getApp()
Component({
    
    
  data: {
    
    
  },
  options:{
    
    
    addGlobalClass: true,
  },
  properties:{
    
    
    teacher_list: {
    
    
      type: Object,//格式有Object、Array、String等
      value: ''
    }
  },
  methods:{
    
    
  }})

4.在子组件页面调用数据teacher_list

<view  wx:for="{
    
    {teacher_list}}"  >
</view>