优化：点击大纲的时候请求接口

src/components/detail/outline/index.js

@@ -20,9 +20,11 @@ class OutLine extends Component {
         return e.childNodes.length === 0 ? "" : e.childNodes[0].nodeValue;
     }
 
-    componentDidMount() {
-        this.getList()
-    }
+    tabchange = (tab, index) => {
+        if(index === 1) {
+            this.getList()
+        }
+    };
 
     // 获取大纲数据
     getList = () => {
@@ -49,7 +51,10 @@ class OutLine extends Component {
         return (
             <div className='course-detail'>
                 <WhiteSpace/>
-                <Tabs tabs={tabs}>
+                <Tabs tabs={tabs}
+                initialPage={0}
+                onChange={(tab, index) => { this.tabchange(tab, index) }}
+                >
                     {/*介绍*/}
                     <div className='introduce'>
                         <p>讲师：{introduce.teachers}</p>