微信小程序实现单选按钮

<view class='button_container'>
  <block wx:for="{{buttons}}" wx:key="buttons">
    <button class='{{item.checked?"checked_button":"nORMal_button"}}' data-id='{{item.id}}' bindtap='radioButtonTap'>{{item.name}}</button>
  </block>
</view>

Page({
  data:{
    buttons: [{ id: 1, name: '失物招领' }, { id: 2, name: '寻物启事' }]
  },
  onLoad: function() {//默认选了第一个
    this.data.buttons[0].checked = true;
    this.setData({
      buttons: this.data.buttons,
    })
  },
   
  radioButtonTap: function (e) {
  console.log(e)
  let id = e.currentTarget.dataset.id
  console.log(id)
  for (let i = 0; i < this.data.buttons.length; i++) {
    if (this.data.buttons[i].id == id) {
      //当前点击的位置为true即选中
      this.data.buttons[i].checked = true;    
    }
    else {
      //其他的位置为false
    this.data.buttons[i].checked = false;
    }
  }
  this.setData({
  buttons: this.data.buttons
  })
  }
})

.button_container{
  display: flex;
  flex-direction: row;
  justify-content: space-around
  }
  
  
 .normal_button{
  background: white；
  }
  
  
  .checked_button{
  background: #36ab60;
  color: white
  }```