084获取日期选择器当前的时间

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController
4 @property (strong, nonatomic) UIDatePicker *datePChoice;
5
6 @end

ViewController.m

 1 #import "ViewController.h"
 2
 3 @interface ViewController ()
 4 - (void)layoutUI;
 5 - (void)pickerDidChange:(UIDatePicker *)sender;
 6 - (void)buttonDidPush:(UIButton *)sender;
 7 @end
 8
 9 @implementation ViewController
10
11 - (void)viewDidLoad {
12     [super viewDidLoad];
13
14     [self layoutUI];
15 }
16
17 - (void)didReceiveMemoryWarning {
18     [super didReceiveMemoryWarning];
19     // Dispose of any resources that can be recreated.
20 }
21
22 - (void)layoutUI {
23     _datePChoice = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
24     CGPoint newPoint = self.view.center;
25     _datePChoice.center = newPoint;
26     [_datePChoice addTarget:self
27                     action:@selector(pickerDidChange:) forControlEvents:UIControlEventValueChanged];
28     [self.view addSubview:_datePChoice];
29
30     UIButton *btnChoice = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 150, 40)];
31     newPoint.y += 160;
32     btnChoice.center = newPoint;
33     btnChoice.layer.masksToBounds = YES;
34     btnChoice.layer.cornerRadius = 10.0;
35     btnChoice.layer.borderColor = [UIColor colorWithRed:0.655 green:0.619 blue:0.601 alpha:1.000].CGColor;
36     btnChoice.layer.borderWidth = 2.0;
37     [btnChoice setTitle:@"显示日期" forState:UIControlStateNormal];
38     [btnChoice setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
39     [btnChoice addTarget:self
40                   action:@selector(buttonDidPush:)
41         forControlEvents:UIControlEventTouchUpInside];
42     [self.view addSubview:btnChoice];
43 }
44
45 - (void)pickerDidChange:(UIDatePicker *)sender {
46     NSLog(@"%@", [sender.date description]); //2015-04-19 5:42:58 +0000；显示时区少了8个钟，所以用NSDateFormatter显示的时间才算正常时区时间
47 }
48
49 - (void)buttonDidPush:(UIButton *)sender {
50     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
51     [formatter setDateFormat:@"yyyy/MM/dd HH:mm"]; //2015/04/19 13:42
52     NSString *strCurrentDate = [formatter stringFromDate:_datePChoice.date];
53
54     UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"选择的日期"
55                                                      message:strCurrentDate
56                                                     delegate:nil
57                                            cancelButtonTitle:nil
58                                            otherButtonTitles:@"确定", nil];
59     [alertV show];
60 }
61
62 @end