fix(TreeSelect): mulitple set true has empty selection tag

src/tree-select/__tests__/__snapshots__/index.test.jsx.snap

@@ -465,49 +465,30 @@ exports[`TreeSelect > :props > :minCollapsedNum 1`] = `
 
 exports[`TreeSelect > :props > :multiple 1`] = `
 <div
-  class="t-select-input t-select-input--multiple t-tree-select"
+  class="t-select-input t-select-input--multiple t-select-input--empty t-tree-select"
 >
   <div
-    class="t-input__wrap t-tag-input t-tag-input--break-line t-tag-input--with-tag t-tag-input__with-suffix-icon"
+    class="t-input__wrap t-tag-input t-tag-input--break-line t-is-empty t-tag-input__with-suffix-icon"
   >
     <div
       class="t-input t-is-readonly t-input--prefix t-input--suffix"
     >
       <div
         class="t-input__prefix"
-      >
-        <div
-          class="t-tag t-tag--default t-tag--dark t-tag--ellipsis t-tag--close"
-        >
-          <span
-            class="t-tag--text"
-            style="max-width: 300px;"
-          />
-          <svg
-            class="t-icon t-icon-close t-tag__icon-close"
-            fill="none"
-            height="1em"
-            viewBox="0 0 24 24"
-            width="1em"
-          >
-            <path
-              d="M7.05 5.64L12 10.59l4.95-4.95 1.41 1.41L13.41 12l4.95 4.95-1.41 1.41L12 13.41l-4.95 4.95-1.41-1.41L10.59 12 5.64 7.05l1.41-1.41z"
-              fill="currentColor"
-            />
-          </svg>
-        </div>
-      </div>
+      />
       <input
         autocomplete=""
-        class="t-input__inner t-input--soft-hidden"
-        placeholder=""
+        class="t-input__inner"
+        placeholder="请选择"
         readonly="readonly"
         type="text"
         unselectable="on"
       />
       <span
         class="t-input__input-pre"
-      />
+      >
+        请选择
+      </span>
       <span
         class="t-input__suffix t-input__suffix-icon"
       >

src/tree-select/useTreeSelect.ts

@@ -12,7 +12,7 @@ import { TreeOptionData, TreeKeysType } from '../common';
 import useVModel from '../hooks/useVModel';
 import useDefaultValue from '../hooks/useDefaultValue';
 import { SelectInputProps } from '../select-input';
-import { getNodeDataByValue } from './utils';
+import { getNodeDataByValue, normalizeArray } from './utils';
 
 const DEFAULT_KEYS = {
   label: 'label',
@@ -107,7 +107,7 @@ export default function useTreeSelect(props: TdTreeSelectProps, context: SetupCo
   // multiple tree select node info list
   function getMultipleNodeInfo(): TreeOptionData[] {
     const { value } = treeSelectValue;
-    const list = Array.isArray(value) ? value : [value];
+    const list = normalizeArray(value);
     if (treeRef.value) {
       return list.map((item) => {
         const finalValue = typeof item === 'object' ? item.value : item;

src/tree-select/utils.ts

@@ -1,3 +1,4 @@
+import isNil from 'lodash/isNil';
 import lodashGet from 'lodash/get';
 import lodashSet from 'lodash/set';
 import { TreeOptionData, TreeKeysType } from '../common';
@@ -47,4 +48,12 @@ export function getNodeDataByValue(
   return values.map((value) => results.get(value));
 }
 
+export function normalizeArray(value: any) {
+  if (isNil(value)) {
+    return [];
+  }
+
+  return Array.isArray(value) ? value : [value];
+}
+
 export default {};