antd picker

 <Picker
          data={seasons}
          title="选择类别"
          cols={1}
        
          extra="请选择(可选)"
          value={this.state.sValue}
          onChange={v =>{ this.setState({ sValue: v } );/*(alert(v)*/}}
          onOk={v =>{ /*this.setState({ sValue: v });alert(v) */} }
        >
          <List.Item arrow="horizontal">类别</List.Item>
        </Picker>