iOS上图片不刷新问题 fix review by 陈林

@@ -51,7 +51,7 @@ export default class HotBrandList extends Component{
 		return (
             <TouchableOpacity onPress={() => this.props.onPressHotBrandItem && this.props.onPressHotBrandItem(rowData.toJS(), rowID)}>
                 <View style={styles.rowContainer}>
-                	<View style={styles.rowImageContainer}><Image style={styles.rowThumbnail} source={{uri: imageUrl}}/></View>               	
+                	<View style={styles.rowImageContainer}><Image style={styles.rowThumbnail} key={imageUrl} source={{uri: imageUrl}}/></View>               	
             		<Text style={styles.rowText} numberOfLines={1}>{brandName}</Text>
                 </View>
             </TouchableOpacity>