当应用程序在iphone中再次运行时，如何存储选定值并在单元格上显示

我有一个日期选择器视图控制器，可以在其中选择日期。当我回来时，我可以在tableview单元格中看到所选日期。到目前为止，这一切都正常工作。当我退出应用程序并再次运行它时，我会遇到一个问题，我在单元格中看不到最后选择的值。我该怎么做

如果用户退出应用程序，他们应该能够在单元格上看到最后选择的日期，以便查看或使用该日期

这是我的日期控制器类代码.m文件

- (void)viewDidLoad
{ 
    datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 40, 0, 0)]; 
    datePicker.datePickerMode = UIDatePickerModeDate;  
    datePicker.minimumDate = [NSDate date];
    [self.view addSubview:datePicker];


    [super viewDidLoad];
}

-(void)DateChangeForFinalPayMent
{

    //remove time
    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
    int comps = NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit;
    NSDateComponents *dateComponents = [gregorian components:comps fromDate:[datePicker date]]; 
    NSDate *dateSelected = [gregorian dateFromComponents:dateComponents]; 
    NSLog(@"dateSelected:%@",dateSelected);
    [gregorian release];

    if ([selectionData type] == 0)
        [selectionData setFromDateSelected:dateSelected];

    else
        [selectionData setToDateSelected:dateSelected];
}


-(IBAction)click
{
    [self DateChangeForFinalPayMent];
    [self.navigationController popViewControllerAnimated:YES];
}

这是我的firstview控制器，我在单元格上显示我选择的值日期

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"dd/MM/yyyy"];

    NSString* fromDate = [dateFormat stringFromDate:app.selectionData.fromDateSelected];
   NSString* toDate = [dateFormat stringFromDate:app.selectionData.toDateSelected];
    if ([indexPath row] == 0 && [indexPath section] == 1)
    {

        cell.textLabel.text=@"From Date";
        cell.detailTextLabel.text=fromDate;

    }   
    if ([indexPath row] == 1 && [indexPath section] == 1)
    {
        cell.textLabel.text=@"To Date";
        cell.detailTextLabel.text=toDate;
    }

---

任何人都可以建议如何存储该值，并在用户再次打开应用程序时将其显示给用户。

PFB代码用于保存并从用户默认值中检索日期值

//Storing date value to the  user defaults 

NSDate * selectedDate = [NSDate date]; 

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 

//Set the date format.. u can choose different one based on ur requirement
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 

//String from the NSDate
NSString *pStrDate = [dateFormatter stringFromDate:selectedDate];

//Save date value to the user defaults
 [[NSUserDefaults standardUserDefaults] setObject: pStrDate forKey:@"date"]; 

 [[NSUserDefaults standardUserDefaults] synchronize];


Retrieving date from the user defaults: 
NSDate *dateFromString = [[NSDate alloc] init]; 
NSString *savedDateVaue=nil; 

if([[NSUserDefaults standardUserDefaults] objectForKey:@"date"]!=nil)
{
 savedDateVaue=[[NSUserDefaults standardUserDefaults] objectForKey:@"date"];
 dateFromString = [dateFormatter dateFromString:savedDateVaue];  
}

---

用于保存和从用户默认值中检索日期值的PFB代码

//Storing date value to the  user defaults 

NSDate * selectedDate = [NSDate date]; 

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 

//Set the date format.. u can choose different one based on ur requirement
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 

//String from the NSDate
NSString *pStrDate = [dateFormatter stringFromDate:selectedDate];

//Save date value to the user defaults
 [[NSUserDefaults standardUserDefaults] setObject: pStrDate forKey:@"date"]; 

 [[NSUserDefaults standardUserDefaults] synchronize];


Retrieving date from the user defaults: 
NSDate *dateFromString = [[NSDate alloc] init]; 
NSString *savedDateVaue=nil; 

if([[NSUserDefaults standardUserDefaults] objectForKey:@"date"]!=nil)
{
 savedDateVaue=[[NSUserDefaults standardUserDefaults] objectForKey:@"date"];
 dateFromString = [dateFormatter dateFromString:savedDateVaue];  
}

---

看一看refer看一看refer ksk我尝试了，但它不起作用可能会在我的代码中更改如何做请帮助我//在用户默认值中存储日期NSDate*selectedDate=[NSDate date]；NSDateFormatter*dateFormatter=[[NSDateFormatter alloc]init]；[日期格式化程序setDateFormat:@“yyyy-MM-dd HH:MM:ss”]；NSString*pStrDate=[dateFormatter stringFromDate:selectedDate]；[[NSUserDefaults standardUserDefaults]设置对象：pStrDate forKey:@“日期”]；从用户检索日期默认值：NSDate*dateFromString=[[NSDate alloc]init]；NSString*pDate=[[NSUserDefaults standardUserDefaults]objectForKey:@“date”]；dateFromString=[dateFormatter dateFromString:pDate]；ksk我尝试了，但它不起作用可能会在我的代码中更改如何做请帮助我//将日期存储在用户默认值NSDate*selectedDate=[NSDate date]；NSDateFormatter*dateFormatter=[[NSDateFormatter alloc]init]；[日期格式化程序setDateFormat:@“yyyy-MM-dd HH:MM:ss”]；NSString*pStrDate=[dateFormatter stringFromDate:selectedDate]；[[NSUserDefaults standardUserDefaults]设置对象：pStrDate forKey:@“日期”]；从用户检索日期默认值：NSDate*dateFromString=[[NSDate alloc]init]；NSString*pDate=[[NSUserDefaults standardUserDefaults]objectForKey:@“date”]；dateFromString=[dateFormatter dateFromString:pDate]；