add local-provider transfer demo

Author: tangjinzhou

components/locale-provider/demo/all.md

@@ -40,6 +40,14 @@ Components which need localization support are listed here, you can toggle the l
             <a href="#">Click to confirm</a>
           </a-popconfirm>
         </div>
+        <div className="example">
+          <a-transfer
+            :dataSource="[]"
+            showSearch
+            :targetKeys="[]"
+            :render="item => item.title"
+          />
+        </div>
         <div :style="{ width: '319px', border: '1px solid #d9d9d9', borderRadius: '4px' }">
           <a-calendar :fullscreen="false" :value="moment()" />
         </div>

components/transfer/demo/custom-item.md

@@ -54,7 +54,7 @@ export default {
     },
     renderItem(item) {
       const customLabel = (
-        <span className="custom-item">
+        <span class="custom-item">
           {item.title} - {item.description}
         </span>
       );

components/transfer/index.jsx

@@ -292,6 +292,7 @@ export default {
     },
 
     renderTransfer (locale) {
+      const props = getOptionProps(this)
       const {
         prefixCls = 'ant-transfer',
         operations = [],
@@ -300,11 +301,11 @@ export default {
         listStyle,
         filterOption,
         lazy,
-        render: renderItem,
-      } = getOptionProps(this)
+      } = props
       const notFoundContent = getComponentFromProp(this, 'notFoundContent')
       const { leftFilter, rightFilter, sourceSelectedKeys, targetSelectedKeys, $scopedSlots } = this
       const { body, footer } = $scopedSlots
+      const renderItem = props.render
       const { leftDataSource, rightDataSource } = this.splitDataSource(this.$props)
       const leftActive = targetSelectedKeys.length > 0
       const rightActive = sourceSelectedKeys.length > 0