UIDatePicker应用 常用属性和方法

#import "ViewController.h"

@interface ViewController ()
@property(strong,nonatomic)UIDatePicker * datepicker;
-(void)UpdataTime;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.datepicker = [[UIDatePicker alloc]initWithFrame:CGRectMake(10, 100, 350, 100)];
    self.datepicker.backgroundColor = [UIColor whiteColor];
    self.datepicker.datePickerMode = UIDatePickerModeDateAndTime;
    //设置地区，即显示的语言
    self.datepicker.locale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh_Hans_CN"];
    //设置当前日历
    [self.datepicker setCalendar:[NSCalendar currentCalendar]];
    //使得时间和系统同步
    [self.datepicker setTimeZone:[NSTimeZone systemTimeZone]];
    
    [self.datepicker setDate:[NSDate date] animated:YES];
    
    [self.datepicker addTarget:self action:@selector(UpdataTime) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:self.datepicker];
    
    
}
-(void)UpdataTime
{
    [self.datepicker setDate:[NSDate date] animated:YES];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

1、常用属性

//设置pickerview的显示模式

self.datepicker.datePickerMode = UIDatePickerModeDateAndTime;

其中UIDatePickerModeCountDownTimer 是倒计时模式，需用到

countDownDuration这个属性

//设置地区，即显示的语言

self.datepicker.locale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh_Hans_CN"];

//设置当前日历

[self.datepicker setCalendar:[NSCalendar currentCalendar]];

//使得时间和系统同步

[self.datepicker setTimeZone:[NSTimeZone systemTimeZone]];

//

date属性可读可写，可以从pickerview上读取数据显示到其他上面

//目标动作回调，实时监听数据更新

[self.datepicker addTarget:self action:@selector(UpdataTime) forControlEvents:UIControlEventValueChanged];

2、方法

//设置时间

self.datepicker setDate:[NSDate date] animated:YES];