UIDatePicker时间选择器

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#import "ViewController.h"

@interface ViewController ()
@property (strong,nonatomic) UIDatePicker* dp;
@property (strong,nonatomic) UILabel* lb;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //dateTimePicker
    self.dp = [[UIDatePicker alloc]initWithFrame:CGRectMake(0, 200, 400, 200)];
    self.dp.datePickerMode = UIDatePickerModeDateAndTime;
    self.dp.locale = [NSLocale localeWithLocaleIdentifier:@"zh-Hans"];
    [self.view addSubview:self.dp];
    //label
    self.lb = [[UILabel alloc]initWithFrame:CGRectMake(100, 500, 200, 21)];
    self.lb.text = @"label";
    self.lb.textAlignment = NSTextAlignmentCenter;
    [self.view addSubview:self.lb];
    //button
    UIButton* b1 = [UIButton buttonWithType:UIButtonTypeSystem];
    b1.frame = CGRectMake(200, 600, 100, 50);
    [b1 setTitle:@"button" forState:UIControlStateNormal];
    [b1 addTarget:self action:@selector(onclick:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:b1];
}

-(void)onclick:(id)sender{
    NSDate* date = self.dp.date;
    NSLog(@"%@",[date descriptionWithLocale:[NSLocale currentLocale]]);
    NSDateFormatter* df = [[NSDateFormatter alloc] init];
    df.dateFormat = @"YYYY-MM-dd HH:mm:ss";
    NSLog(@"%@",[df stringFromDate:date]);
    self.lb.text = [df stringFromDate:date];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end