Merge pull request #24 from suilyy/sig

fix: 修改confirm返回值异常的问题

Author: GreatQin1

harmony/picker/src/main/ets/PickerBaseOperate.ets

@@ -101,7 +101,7 @@ function changeSelect(val: string | string[], index: number | number[]) {
     const valArr = Array.isArray(val)? JSON.stringify(val) : JSON.stringify([val]);
     const indexArr = Array.isArray(val)? JSON.stringify(index) : JSON.stringify([index]);
     pickerCtx.rnInstance.emitDeviceEvent(EVENT, { type: SELECT, selectedValue: valArr, selectedIndex: indexArr });
-    defaultValue = val;
+    defaultValue = JSON.parse(valArr);
     selectIndex = index as number[];
   } catch (error) {
     Logger.error(TAG,
@@ -324,7 +324,7 @@ export class GlobalDialog {
       }
       if (!Array.isArray(content.selectedValue)) {
         defaultValue = content.selectedValue?.toString();
-      } else {
+      } else if(!!content.selectedValue.length) {
         defaultValue = content.selectedValue.map(item => {
           return item.toString();
         })