From 236bcd69fcb3405935882d765b3d714616d1e2ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E9=87=91=E5=B9=B3?=
 <32758131+NameWjp@users.noreply.github.com>
Date: Tue, 20 Apr 2021 17:42:54 +0800
Subject: [PATCH] fixbug #3232
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监听父组件的变化后不需要再 $emit
---
 packages/datetime-picker/index.ts | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/packages/datetime-picker/index.ts b/packages/datetime-picker/index.ts
index 804dde1d3..dba469234 100644
--- a/packages/datetime-picker/index.ts
+++ b/packages/datetime-picker/index.ts
@@ -52,7 +52,7 @@ VantComponent({
     ...pickerProps,
     value: {
       type: null,
-      observer: 'updateValue',
+      observer: 'updateValueNotEmit',
     },
     filter: null,
     type: {
@@ -118,6 +118,17 @@ VantComponent({
         this.updateColumns();
       }
     },
+    
+    updateValueNotEmit() {
+      const { data } = this;
+      const val = this.correctValue(data.value);
+      const isEqual = val === data.innerValue;
+      if (!isEqual) {
+        this.updateColumnValue(val);
+      } else {
+        this.updateColumns();
+      }
+    },
 
     getPicker() {
       if (this.picker == null) {