如何更改标签上的日期选择器选定值

Question

我想在标签上显示datepicker中的选定日期，但标签只显示当前日期，它不显示我从datepicker中选择的日期这是代码友好告诉我怎样可以与任意选择的日期从日期选择器

#import "ViewController.h" 

@implementation ViewController 
@synthesize datepicker,mylabel; 


- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Release any cached data, images, etc that aren't in use. 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    NSDate *chosen = datepicker.date; 
    NSDateFormatter *formatter = [[NSDateFormatter alloc]init]; 
    formatter.dateStyle = NSDateFormatterMediumStyle; 
    mylabel.text = [formatter stringFromDate:chosen]; 
    [formatter release];  

    // Do any additional setup after loading the view, typically from a nib. 

} 

- (void)viewDidUnload 
{ 

    [super viewDidUnload]; 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
} 

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
} 

- (void)viewDidAppear:(BOOL)animated 
{ 
    [super viewDidAppear:animated]; 
} 

- (void)viewWillDisappear:(BOOL)animated 
{ 
    [super viewWillDisappear:animated]; 
} 

- (void)viewDidDisappear:(BOOL)animated 
{ 
    [super viewDidDisappear:animated]; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    // Return YES for supported orientations 
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
} 

@end 

Answer 1

// code for Date picker for current date 

    datepicker=[[UIDatePicker alloc]initWithFrame:CGRectMake(0, 200, 320, 150)]; 
     //[self.view addSubview:datepicker]; 
     datepicker.date = [NSDate date]; 
     datepicker.datePickerMode=UIDatePickerModeDate; 
     NSDateFormatter *df = [[NSDateFormatter alloc] init]; 
     df.timeStyle = NSDateFormatterNoStyle; 

     label.text=[NSString stringWithFormat:@"%@", 
        [df stringFromDate:[NSDate date]]]; 
     df.dateFormat = @"yyyy-MM-dd"; 

    // set action for date picker 

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

    //method for change date 

    - (void)DateChange:(id)sender 
{ 
     NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
     [dateFormatter setDateFormat:@"dd-MM-yyyy"]; 
     label.text = [dateFormatter stringFromDate:datepicker.date]; 
     date.text=strDate; 
} 

更改文本标签