//

//  ViewController.m

//  手写UIDatePicker

//

//  Created by 非凡 程序员 on 15/11/13.

//  Copyright (c) 2015年 非凡 程序员. All rights reserved.

//

.h文件

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property(nonatomic,strong)UIDatePicker *datePicker;

@end

---------------------------------

.m文件

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

  //定义一个datePicker

    _datePicker = [ [ UIDatePicker alloc ] initWithFrame:CGRectMake (10, 10, 100, 100) ] ;

    //设置datePicker的样式

    _datePicker.datePickerMode = UIDatePickerModeDateAndTime ;

    //设置datePicker的时间差

    _datePicker.minuteInterval = 6;

    //设置datePicker的最小时间为当前时间

    _datePicker.minimumDate = [ NSDate date ] ;

    //对datePicker添加事件

    [ _datePicker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged ] ;

    //将控件添加在页面上

    [ self.view addSubview:_datePicker ] ;

}

//当datePicker值发生改变会回调的自定义方法

- ( void ) dateChange : ( UIDatePicker * ) sender {

    NSDate  * date = _datePicker.date ; //获取datePicker的时间

    NSLog ( @" %@ " , date )

    ;

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

}

@end

--------------------------------------------------------------------------------------------------------------

托线

//

//  ViewController.m

//  UIDatePicker

//

//  Created by 非凡 程序员 on 15/11/13.

//  Copyright (c) 2015年 非凡 程序员. All rights reserved.

//

.h文件

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (weak, nonatomic) IBOutlet UIDatePicker *datePicker;

@end

-----------------------------------

.m文件

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

//    UIDatePicker 是一个控制器类，他是UIControl的子类，专门用于接受日期、时间和持续时长的输入。日期选取器的各列会按照指定的风格进行自动配置

//    UIDatePicker 依赖于 NSDate 类

    _datePicker.minuteInterval=6;

     //设置datePicker的样式

    _datePicker.datePickerMode=UIDatePickerModeDate;

//    格式化一个字符串型的时间为NSDate类型

    NSString *string=@"2012-12-22";

    NSDateFormatter *formatter=[[NSDateFormatter alloc]init];

    [formatter setDateFormat:@"yyyy-MM-dd"];

    NSDate *date=[formatter dateFromString:string];

//    设置datePicker的最小时间

    _datePicker.minimumDate=date;

     //对datePicker添加事件

    [_datePicker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged];

}

//当datePicker值发生改变会回调的自定义方法

-(void)dateChange:(UIDatePicker *)sender{

    NSDate *date=_datePicker.date;

    NSLog(@"%@",date);

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

Objective-c 手写UIDatePicker

原文：http://my.oschina.net/u/2483781/blog/530093