vueのv-modelがradioコントロールを更新する方法

v-model           value、checked、selected      ，     Vue                 v-model  radio     ，v-model         </span><span style="color:rgb(52,73,94);font-family:'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;font-size:15px;background-color:rgb(255,255,255);">           。   </span></code><code><span style="color:rgb(52,73,94);font-family:'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;font-size:15px;background-color:rgb(255,255,255);">     </span><span style="color:rgb(82,82,82);font-size:.8em;line-height:1.5em;"><span style="line-height:24px;color:rgb(52,73,94);font-family:'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;font-size:15px;background-color:rgb(255,255,255);"> </span></span><span style="color:rgb(82,82,82);font-weight:normal;font-size:.8em;line-height:1.5em;"><strong><span style="line-height:24px;color:rgb(52,73,94);font-family:'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;font-size:15px;background-color:rgb(255,255,255);"> </span></strong></span><span style="font-weight:normal;color:rgb(52,73,94);font-family:'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;font-size:15px;background-color:rgb(255,255,255);"><strong>            </strong></span></code></span></span></code></pre> 
  <pre><code><strong>1、</strong><span style="font-size:.8em;line-height:1.5em;"><strong>v-model  </strong></span><span style="font-size:.8em;line-height:1.5em;"><strong>radio   value ，  value  ，</strong></span><span style="font-size:.8em;line-height:1.5em;"><strong>picked     。</strong></span></code></pre> 
  <pre><code><span class="line" style="min-height:1.5em;"><span class="tag" style="color:rgb(41,115,183);"><<span class="name">div</span> <span class="attr">id</span>=<span class="string" style="color:rgb(66,185,131);">"example-4"</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">input</span> <span class="attr">type</span>=<span class="string" style="color:rgb(66,185,131);">"radio"</span> <span class="attr">id</span>=<span class="string" style="color:rgb(66,185,131);">"one"</span> <span class="attr">value</span>=<span class="string" style="color:rgb(66,185,131);">"One"</span> <span class="attr">v-model</span>=<span class="string" style="color:rgb(66,185,131);">"picked"</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">label</span> <span class="attr">for</span>=<span class="string" style="color:rgb(66,185,131);">"one"</span>></span>One<span class="tag" style="color:rgb(41,115,183);"><span class="name">label</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">br</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">input</span> <span class="attr">type</span>=<span class="string" style="color:rgb(66,185,131);">"radio"</span> <span class="attr">id</span>=<span class="string" style="color:rgb(66,185,131);">"two"</span> <span class="attr">value</span>=<span class="string" style="color:rgb(66,185,131);">"Two"</span> <span class="attr">v-model</span>=<span class="string" style="color:rgb(66,185,131);">"picked"</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">label</span> <span class="attr">for</span>=<span class="string" style="color:rgb(66,185,131);">"two"</span>></span>Two<span class="tag" style="color:rgb(41,115,183);"><span class="name">label</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">br</span>></span></span>
<span class="line" style="min-height:1.5em;">  <span class="tag" style="color:rgb(41,115,183);"><<span class="name">span</span>></span>Picked: {{ picked }}<span class="tag" style="color:rgb(41,115,183);"><span class="name">span</span>></span></span>
<span class="line" style="min-height:1.5em;"><span class="tag" style="color:rgb(41,115,183);"><span class="name">div</span>></span></span></code></pre> 
  <pre><code><span class="line" style="min-height:1.5em;"><span class="tag" style="color:rgb(41,115,183);"/></span></code></pre> 
  <pre><code><span class="line" style="min-height:1.5em;"><span class="keyword" style="color:rgb(233,105,0);">new</span> Vue({</span>
<span class="line" style="min-height:1.5em;">  el: <span class="string" style="color:rgb(66,185,131);">'#example-4'</span>,</span>
<span class="line" style="min-height:1.5em;">  data: {</span>
<span class="line" style="min-height:1.5em;">    picked: <span class="string" style="color:rgb(66,185,131);">''</span></span>
<span class="line" style="min-height:1.5em;">  }</span>
<span class="line" style="min-height:1.5em;">})</span></code></pre> 
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