详解微信小程序组件：radio单选项目

<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">
        <label class="radio" wx:for="{{items}}">
          <radio value="{{item.name}}" checked="{{item.checked}}"/>{{item.value}}
        </label>
      </radio-group>
    </view>
  </view>
</view>

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)
  }
})

page {
    min-height: 100%;
    flex: 1;
    background-color: #FBF9FE;
    font-size: 32rpx;
    font-family: -apple-system-font,Helvetica Neue,Helvetica,sans-serif;
    overflow: hidden;
}
.page__hd{
    padding: 50rpx 50rpx 100rpx 50rpx;
    text-align: center;
}
.page__title{
    display: inline-block;
    padding: 20rpx 40rpx;
    font-size: 32rpx;
    color: #AAAAAA;
    border-bottom: 1px solid #CCCCCC;
}
.page__desc{
    display: none;
    margin-top: 20rpx;
    font-size: 26rpx;
    color: #BBBBBB;
}
.radio {
  display: block;
  margin-bottom: 20rpx;
}
.section{
    margin-bottom: 80rpx;
}
.section_gap{
    padding: 0 30rpx;
}