tring</span>, isAsync<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span></li>
<li class="tsd-description">
<div class="tsd-comment tsd-typography"><p>获取表单组件实例
key: 字段key
isAsync: 是否异步获取，传true时，此方法返回promise（当组件是异步组件&lt;extends中的组件&gt;时，第一次获取会为空，