优化树生成的代码生成：增加loading、修改删除按钮的回调函数为箭头函数

ruoyi-generator/src/main/resources/vm/vue/index-tree.vue.vm

@@ -480,12 +480,14 @@ export default {
     },
     /** 修改按钮操作 */
     handleUpdate(row) {
+	  this.loading = true;
       this.reset();
       this.getTreeselect();
       if (row != null) {
         this.form.${treeParentCode} = row.${treeCode};
       }
       get${BusinessName}(row.${pkColumn.javaField}).then(response => {
+	    this.loading = false;
         this.form = response.data;
 #foreach ($column in $columns)
 #if($column.htmlType == "checkbox")
@@ -500,6 +502,7 @@ export default {
     submitForm() {
       this.#[[$]]#refs["form"].validate(valid => {
         if (valid) {
+		  this.loading = true;
 #foreach ($column in $columns)
 #if($column.htmlType == "checkbox")
           this.form.$column.javaField = this.form.${column.javaField}.join(",");
@@ -507,12 +510,14 @@ export default {
 #end
           if (this.form.${pkColumn.javaField} != null) {
             update${BusinessName}(this.form).then(response => {
+			  this.loading = false;
               this.msgSuccess("修改成功");
               this.open = false;
               this.getList();
             });
           } else {
             add${BusinessName}(this.form).then(response => {
+			  this.loading = false;
               this.msgSuccess("新增成功");
               this.open = false;
               this.getList();
@@ -527,9 +532,11 @@ export default {
           confirmButtonText: "确定",
           cancelButtonText: "取消",
           type: "warning"
-        }).then(function() {
+        }).then(() => {
+		  this.loading = true;
           return del${BusinessName}(row.${pkColumn.javaField});
         }).then(() => {
+		  this.loading = false;
           this.getList();
           this.msgSuccess("删除成功");
         })