IOS开发基础教程学习笔记2 DatePicker获取时间

////  ViewController.h//  picker//#import <UIKit/UIKit.h>@interface ViewController : UIViewController{        IBOutlet UIDatePicker *datePicker;}- (IBAction)showDate:(UIButton *)sender;@end

////  ViewController.m//  picker//#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.    NSDate *now = [[NSDate alloc] init];    [datePicker setDate: now animated: YES];}- (void)viewDidUnload{    datePicker = nil;    [super viewDidUnload];    // Release any retained subviews of the main view.}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);}- (IBAction)showDate:(UIButton *)sender{    NSDate *selected = [datePicker date];    NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];    [dateformatter setDateFormat: @"yyyy-MM-dd HH:mm +0800"];    NSString *destDateString = [dateformatter stringFromDate: selected];    UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"date and time" message: destDateString delegate: nil cancelButtonTitle: @"ok" otherButtonTitles: nil, nil];    [alert show];}@end