wx-parent/components/captcha/captcha.wxml

<!--components/captcha/captcha.wxml-->
<view class="input-group">
  <label>验证码</label>
  <view style="display: flex;">
    <input style="width: 95%;margin-right: 3%;" type="text" placeholder="请输入验证码" bindinput="onInputCode"/>
    <button bindtap="getCode" class="get-code-btn">获取验证码</button>
  </view>
</view>