From d36cbbb752b5823b0e7f45705c9f73b04c9275d8 Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@youzan.com>
Date: Wed, 27 Nov 2019 10:30:02 +0800
Subject: [PATCH] chore: fix unvalid wx:key (#2398)

---
 example/pages/dashboard/index.wxml | 4 ++--
 packages/picker/index.wxml         | 2 +-
 packages/uploader/index.wxml       | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/example/pages/dashboard/index.wxml b/example/pages/dashboard/index.wxml
index 9c6bcabf..33e6c42b 100644
--- a/example/pages/dashboard/index.wxml
+++ b/example/pages/dashboard/index.wxml
@@ -8,7 +8,7 @@
   <van-collapse
     wx:for="{{ list }}"
     wx:for-item="group"
-    wx:key="group.title"
+    wx:key="title"
     value="{{ activeNames }}"
     border="{{ false }}"
     bind:change="onChangeCollapse"
@@ -29,7 +29,7 @@
       />
       <van-cell
         wx:for="{{ group.list }}"
-        wx:key="item.title"
+        wx:key="title"
         is-link
         url="/pages{{ item.path }}/index"
         data-url="/pages{{ item.path }}/index"
diff --git a/packages/picker/index.wxml b/packages/picker/index.wxml
index efd97850..6631a736 100644
--- a/packages/picker/index.wxml
+++ b/packages/picker/index.wxml
@@ -38,7 +38,7 @@
     <picker-column
       class="van-picker__column"
       wx:for="{{ isSimple(columns) ? [columns] : columns }}"
-      wx:key="{{ index }}"
+      wx:key="index"
       data-index="{{ index }}"
       custom-class="column-class"
       value-key="{{ valueKey }}"
diff --git a/packages/uploader/index.wxml b/packages/uploader/index.wxml
index 139b892b..09b69e2a 100644
--- a/packages/uploader/index.wxml
+++ b/packages/uploader/index.wxml
@@ -8,7 +8,7 @@
     <block wx:if="{{ previewImage }}">
       <view
         wx:for="{{ lists  }}"
-        wx:key="{{ index }}"
+        wx:key="index"
         class="van-uploader__preview"
       >
         <image