<view class="page">
    <view class="page__hd">
        <text class="page__title">radio</text>
        <text class="page__desc">单选框</text>
    </view>
    <view class="page__bd">
        <view class="section section_gap">
            <radio-group class="radio-group" bindchange="radioChange">
                <radio class="radio" wx:for-items="{{items}}" wx:key="name" value="{{item.name}}" checked="{{item.checked}}">
                    <text>{{item.value}}</text>
                </radio>
            </radio-group>
        </view>
    </view>
</view>

index.js

Page({
  data: {
    items: [
      { name: 'USA', value: '美国' },
      { name: 'CHN', value: '中国', checked: 'true' },
      { name: 'BRA', value: '巴西' },
      { name: 'JPN', value: '日本' },
      { name: 'ENG', value: '英国' },
      { name: 'FRA', value: '法国' },
    ]
  },
  radioChange: function (e) {
    console.log('radio发生change事件，携带value值为：', e.detail.value)
  }
})