reader/components/donutBuy/index.wxml

<view class="gradeContainer" catchtouchmove='true' bindtap="closeTranscript">
    <view class="popBox zoomIn">
        <view class="title">选择支付方式
            <image src="/static/bclose.png" class="close" />
        </view>
        <radio-group bindchange="radioChange" class="group">
            <label class="weui-cell" style="border-bottom: 2rpx solid white;">
                <view class="pay-row">
                    <image src="/static/wxpay.png" class="wximg" />
                    <view class="name">微信支付</view>
                </view>
                <radio value="wxpay" checked="true" color='#FFAC00' />
            </label>
            <label class="weui-cell">
                <view class="pay-row">
                    <image src="/static/alipay.png" class="img" />
                    <view class="name">支付宝支付</view>
                </view>
                <radio value="alipay" checked="true" color='#FFAC00' />
            </label>
        </radio-group>
        <view class="paymentBox">
            <view class="payment">应付款：<view class="num">¥299</view>
            </view>
            <view class="pay" bindtap="toBuy">立即支付</view>

        </view>
    </view>
</view>