Sencha Touch list css

[code]
/*
*自定义列表页面
*/
Ext.define('app.view.util.MyList', {
alternateClassName: 'myList',
extend: 'Ext.List',
xtype: 'myList',
requires: ['Ext.plugin.ListPaging', 'Ext.plugin.PullRefresh'],
config: {
cls: 'list',
plugins: [{
xclass: 'Ext.plugin.ListPaging',
autoPaging: true,
noMoreRecordsText: '没有更多内容了',
loadMoreText: '加载更多...'
},
{
xclass: 'Ext.plugin.PullRefresh',
lastUpdatedText: '上次刷新时间：',
loadingText: '加载中...',