fix set title :review by huangyi

@@ -38,10 +38,14 @@ export default {
     if (!setTitle) {
       return this.title;
     }
-    if (this.title) {
-      setTitle(this.title);
-      this.$xianyu.setXianyuTitle({ title: this.title });
-    }
+
+    setTimeout(() => {
+      if (this.title) {
+        setTitle(this.title);
+        this.$xianyu.setXianyuTitle({ title: this.title });
+      }
+    }, 100);
+
     this.setTitle = setTitle;
   },
   computed: {