UIDatePicker

//创建DatePicker
datePicker = UIDatePicker(frame: CGRectMake(0, 50, 380, 200))
//将日期选择器区域设置为中文，则选择器日期显示为中文
datePicker.locale = NSLocale(localeIdentifier: "zh_CN")
datePicker.addTarget(self, action: "dateChanged:", forControlEvents: UIControlEvents.ValueChanged)
self.view.addSubview(datePicker)

//日期选择器响应方法
func dateChanged(datePicker : UIDatePicker){
    //更新提醒时间文本框
    let formatter = NSDateFormatter()
    //日期样式
    formatter.dateFormat = "yyyy年MM月dd日 HH:mm:ss"
    print(formatter.stringFromDate(datePicker.date))
    
}

//添加一个按钮来作为选取
let dateButton = UIButton(frame: CGRectMake(50, 300, 280, 50))
dateButton.backgroundColor = UIColor.redColor()
dateButton.addTarget(self, action: "showClick:", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(dateButton)

func showClick(button:UIButton){
    let date = datePicker.date
    let datestr =  self.dateFormat(date)
    print("您选择的日期和时间是：\(datestr)")
}

func dateFormat(date:NSDate)-> String{
    // 创建一个日期格式器
    let dformatter = NSDateFormatter()
    // 为日期格式器设置格式字符串
    dformatter.dateFormat = "yyyy年MM月dd日 HH:mm:ss"
    // 使用日期格式器格式化日期、时间
    let datestr = dformatter.stringFromDate(date)
    return datestr
}