iOS - removing subview that added programmatically and printing date in label - iphone

Question

I need some help related to iOS application
On clicking the button I added a DatePicker programmatically and now I am not able to remove the view this is my code
I also tried to put the date in label dateLabel but it shows some run time error because it is not a string format I tried some other method also like NSDateFormatter but I am not getting the proper result
-(IBAction)date:(id)sender{
UIDatePicker *datePicker=[[UIDatePicker alloc]initWithFrame:CGRectMake(420, 320, 300, 500)];
[datePicker addTarget:self action:#selector(Pick:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:datePicker];
NSData *date=[datePicker date];
NSLog(#"%#",date);
dateLabel.text=date;
}
-(void)Pick:(id)sender{
[datePicker removeFromSuperview];
}

Answer 1

Do like this
-(IBAction)date:(id)sender
{
datePicker=[[UIDatePicker alloc]initWithFrame:CGRectMake(420, 320, 300, 500)];
[datePicker addTarget:self action:#selector(Pick:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:datePicker];
}
-(void)Pick:(id)sender
{
NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.dateStyle = kCFDateFormatterShortStyle;
label.text=[NSString stringWithFormat:#"%#",
[df stringFromDate:datePicker.date]];
[df release];
[datePicker removeFromSuperview];
datePicker=nil;
}

Answer 2

You are declaring the UIDatePicker *datePicker as a local variable.
It can be only accessible in the declared function (-(IBAction)date:(id)sender).
You need to declare it globally for using it in other functions.
Declare that variable in your .m file under
#interface className()
#property(nonatomic, strong) UIDatePicker *datePicker;
#end

Answer 3

Try this
Declare your datepicker in .h
UIDatePicker *datePicker;
and then
-(IBAction)date:(id)sender
{
datePicker=[[UIDatePicker alloc]initWithFrame:CGRectMake(420, 320, 300, 500)];
[datePicker addTarget:self action:#selector(Pick:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:datePicker];
}
-(void)Pick:(id)sender
{
NSDate *date=[datePicker date];
NSDateFormatter *dateformatter = [[NSDateFormatter alloc]init];
[dateformatter setDateFormat:#"YYYY-MM-DD"];
NSString *dateSTr = [dateformatter stringFromDate:date];
NSLog(#"%#",dateSTr);
dateLabel.text=date;
[datePicker removeFromSuperview];
}