ios datePicker简单写法

头文件里定义 label 和 datepicker

@interface ViewController : UIViewController
{
    UILabel *dateLabel;
    UIDatePicker *datePicker;
}

@property (nonatomic,retain)
IBOutlet UILabel *dateLabel;
@property(nonatomic,retain)
IBOutlet UIDatePicker *datePicker;

-(IBAction)dateChanged:(id)sender;

@end

m文件里边实现

@synthesize dateLabel;
@synthesize datePicker;
- (void)viewDidLoad
{
    [super viewDidLoad];
    NSDate *date = [NSDate date];
    [datePicker setDate:date animated:YES];
    
	

-(IBAction)dateChanged:(id)sender
{
    NSDate *curDate =[datePicker date];
    NSDateFormatter *formate = [[NSDateFormatter alloc] init];
    [formate setDateStyle:NSDateFormatterLongStyle];
    [formate setTimeStyle:NSDateFormatterLongStyle];
    
    NSString *formateDateString = [formate stringFromDate:curDate];
    NSLog(@"string is %@" ,formateDateString);
    dateLabel.text = [NSString stringWithFormat:
                      @"当前时间是 %@", formateDateString];
//    [formate release];
}

   [super viewDidLoad];
    NSDate *date = [NSDate date];
    [datePicker setDate:date animated:YES];
    NSCalendar *cul =[NSCalendar currentCalendar];
    NSDateComponents *com = [cul components:NSYearCalendarUnit|
                                   NSMonthCalendarUnit|
                             NSDayCalendarUnit|
                             NSHourCalendarUnit|
                             NSMinuteCalendarUnit|
                             NSSecondCalendarUnit
                                   fromDate:date];
    NSLog(@"time is %d-%d-%d %02d:%02d:%02d",
          [com year],
          [com month],
          [com day],
          [com hour],
          [com minute],
          [com second]);
    
    NSDateFormatter *formater =[[NSDateFormatter alloc]init];
    [formater setDateFormat:@"YYYY-MM-DD"];
    NSString *dl = [formater stringFromDate:date];
    NSLog(@"CURRENT TIME %@",dl);