[update 拆分详情树节点排序] 拖拽后保留上次展开节点

src/views/documentTool/documentSplit/modules/SplitTreeOrderModal.vue

@@ -231,7 +231,9 @@ export default {
           const treeData = res.result || []
           treeData.forEach(node => this.addTitleToNodes(node))
           this.treeData = treeData
-          this.expandedKeys = this.treeData.length > 0 ? [this.treeData[0].id] : []
+          if (this.treeData.length > 0 && this.expandedKeys <= 0) {
+            this.expandedKeys = [this.treeData[0].id]
+          }
         }
       }).finally(() => {
         this.confirmLoading = false
@@ -249,6 +251,7 @@ export default {
       this.$emit('close')
       this.model = {}
       this.treeData = []
+      this.expandedKeys = []
       this.visible = false
     },
     handleCancel () {