UIDatePicker控件特别类似与UIPickerView控件。主要用来对日期的选择。1. UIDatePicker的实例化和基本设置self.myDatePicker = [[UIDatePicker alloc] init];    [self.myDatePicker setCenter:self.view.center];        // 通过setDatePickerMode方法，来设置UIDatePicker的样式。    [self.myDatePicker setDatePickerMode:UIDatePickerModeDate];        // 添加事件    [self.myDatePicker addTarget:self                          action:@selector(datePickerDateChanged:)                forControlEvents:UIControlEventValueChanged];        // 设置可以选择的时间区域    NSTimeInterval timeInterval=60*60*24*365;    NSDate *oneYearFromToday = [[NSDate date] dateByAddingTimeInterval:timeInterval];    NSDate *twoYearsFromToday = [[NSDate date] dateByAddingTimeInterval:2 * timeInterval];    [self.myDatePicker setMinimumDate:oneYearFromToday];    [self.myDatePicker setMaximumDate:twoYearsFromToday];datePickerDateChanged方法：#pragma mark- UIDatePicker 事件-(void) datePickerDateChanged:(UIDatePicker *)paramDatePicker{    if ([paramDatePicker isEqual:self.myDatePicker]){        NSLog(@"Selected date = %@", paramDatePicker.date);    }}setDatePickerMode方法用来设置UIDatePicker的样式。可用样式为：typedef NS_ENUM(NSInteger, UIDatePickerMode) {    UIDatePickerModeTime,                UIDatePickerModeDate,               UIDatePickerModeDateAndTime,        UIDatePickerModeCountDownTimer  };

来自http://blog.sina.com.cn/s/blog_7b9d64af0101bzd9.html