CityPicker的selected只能是省市区对应的索引，不支持文字

[ChandaZhou]

Do you want to request a feature or report a bug (建议还是bug) ? 建议 What is the current behavior? (现有状况)

1. CityPicker的默认值Selected只能是省市区对应的索引，不能给定文字;
2. Selected值只能初始化一次 What is the expected behavior? （应有状况） 能给selected赋值["浙江省"，“杭州市”，“西湖区”]，并选中selected给定的城市 Which versions of React-weui, weui, and which OS and device are affected by this issue? (React-weui版本 weui版本 机型和系统)

[LoveMyt]

hello 你的 左右按钮 确认 取消 显示文字正常么？