設定日期選擇器

Question

嗨，大家好，我有一個問題

我我的代碼設置與今天的日期日期選擇器，之後，如果用戶改變選擇器我設置一個報警的日期響選擇器。

如何在這些日期「阻止選取器」？

這裏我的代碼，我希望在您的幫助下

NSDate *pickerDate = [NSDate date]; 

NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar]; 


// Divisione della data in fattori 
NSDateComponents *dateComponents = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) 
               fromDate:pickerDate]; 
NSDateComponents *timeComponents = [calendar components:(NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit) 
               fromDate:pickerDate]; 
// Set Up dell'alarme considerando tutti i fattori 
NSDateComponents *dateComps = [[NSDateComponents alloc] init]; 
[dateComps setDay:[dateComponents day]]; 
[dateComps setMonth:[dateComponents month]]; 
[dateComps setYear:[dateComponents year]]; 
[dateComps setHour:[timeComponents hour]]; 
[dateComps setMinute:[timeComponents minute]]; 
//Notifica in meno di un minuto 
[dateComps setSecond:0]; 
NSDate *itemDate = [calendar dateFromComponents:dateComps]; 
[dateComps release]; 
[alarmDatePickerUno setDate:itemDate animated:YES]; 
[alarmDatePickerDue setDate:itemDate animated:YES]; 

    } 


// ALARM UNO 
// Set Allarme Uno 

-(IBAction)setAlarmUno:(id)sender{ 

NSLog(@"picker in allarme"); 

NSCalendar *currentCalendar = [NSCalendar currentCalendar]; 

//Setting dell'allarme in base al picker 
AlarmDateUno = [alarmDatePickerUno date]; 
NSLog(@"allarme settata alle"); 
NSLog(@"%@", AlarmDateUno); 

Answer 1

alarmDatePickerUno.userInteractionEnabled = NO; 
alarmDatePickerDue.userInteractionEnabled = NO; 

編輯澄清後

如果你想使用的應用程序啓動之間的日期，你需要以某種方式繼續存在的日期。我建議使用NSUserDefaults，但您也可以選擇更復雜的Core Data解決方案。使用NSUserDefaults，您每次創建UIDatePicker時都會檢查保存的值，並使用它來初始化選取器。

// Get the date 
NSDate *unoDate = [[NSUserDefaults standardUserDefaults] objectForKey:@"PickerUnoKey"]; 
if (unoDate) { // If we have a persisted date, we set the date of the datePicker 
    [alarmDatePickerUno setDate:unoDate animated:NO]; 
} 

然後，當用戶更改選取器的值時，您需要存儲新值。

// When the datePicker value has changed, we store the value 
[[NSUserDefaults standardUserDefaults] setObject:alarmDatePickerUno.date forKey:@"PickerUnoKey"];