Xcode - DatePicker：仅显示标签的日期字符串

Question

我的应用程序有一个textField，当按下该按钮时，会打开一个datePicker供用户选择日期，然后将此信息发送到标签。我只需要获取DATE值，但发送的字符串类似于：

<UITextField: 0x7ff66e740bf0; frame = (16 12; 289 30); text = '08/03/2017'; opaque = NO; (...and so on...)

如何才能获得DATE字符串？

我的代码是：

 - (void)viewDidLoad 
{
datePicker=[[UIDatePicker alloc]init];
datePicker.datePickerMode=UIDatePickerModeDate;
[self.dia2 setInputView:datePicker];

UIToolbar *toolBar=[[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
[toolBar setTintColor:[UIColor grayColor]];
UIBarButtonItem *doneBtn=[[UIBarButtonItem alloc]initWithTitle:@"Pronto" style:UIBarButtonItemStyleBordered target:self action:@selector(ShowSelectedDate)];
UIBarButtonItem *space=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[toolBar setItems:[NSArray arrayWithObjects:space,doneBtn, nil]];
[self.dia2 setInputAccessoryView:toolBar];
}

-(void)ShowSelectedDate
{  
NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
[formatter setDateFormat:@"dd/MM/YYYY"];
self.dia2.text=[NSString stringWithFormat:@"%@",[formatter stringFromDate:datePicker.date]];
mostraData.text=[NSString stringWithFormat:@"%@", _dia2];
[self.dia2 resignFirstResponder];
}

Answer 1

mostraData.text=[NSString stringWithFormat:@"%@", _dia2];

将文本视图的描述分配给标签，而不是刚刚添加到文本视图中的格式化字符串。

mostraData.text = _dia2.text;