fix: nil error fix

render-process/Explorer.tsx

@@ -280,6 +280,7 @@ export default class Explorer extends Component<ExplorerProps> {
     }
 
     getRootNode(workdir: string) {
+        if(workdir && workdir!==""){
             return new FileDataNode({
                 name: path.basename(workdir),
                 filepath: workdir,
@@ -287,6 +288,9 @@ export default class Explorer extends Component<ExplorerProps> {
                 parent: null,
                 children: []
             });
+        }else{
+            return null;
+        }
     }
 
     // renderContextMeun(selectedNode: FileDataNode) {
@@ -380,7 +384,7 @@ export default class Explorer extends Component<ExplorerProps> {
 
         const root = this.state.root;
         if (!workdir || workdir === "" ) {
-            return `请打开workspace.json文件`;
+            return (<div>请打开workspace.json文件</div>);
         }
 
         const nodes = root ? [root.getRenderData()] : [];