{"flag":true,"datas":[{"cityCode":"0","cityName":"北京市","mapSize":"70M","downloadUrl":"http://www.daditu.com.cn/offlineMap/BIGMAP.zip"},{"cityCode":"1","cityName":"郑州市","mapSize":"60M","downloadUrl":"http://www.daditu.com.cn/offlineMap/BIGMAP.zip"},{"cityCode":"2","cityName":"上海市","mapSize":"75M","downloadUrl":"http://www.daditu.com.cn/offlineMap/BIGMAP.zip"}]}