NSDate с компонентом даты из одного и временного компонента из другого NSDate

У меня есть два элемента управления UIDatePicker в моем приложении, один из которых настроен с помощью UIDatePickerModeDate и один с UIDatePickerModeTime.

Я хочу настроить объект NSDate с датой с UIDatePicker и временем со второго... как?

Спасибо, Марк

Ответ 1

Предположим, что date1 и date2 являются вашими двумя значениями NSDate. date1 содержит ваши компоненты даты, а дата2 содержит ваши компоненты времени. Здесь, как вы объедините их вместе:

NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

// Extract date components into components1
NSDateComponents *components1 = [gregorianCalendar components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit
                                                     fromDate:date1];

// Extract time components into components2
NSDateComponents *components2 = [gregorianCalendar components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit 
                                                     fromDate:date2];

// Combine date and time into components3
NSDateComponents *components3 = [[NSDateComponents alloc] init];

[components3 setYear:components1.year];
[components3 setMonth:components1.month];
[components3 setDay:components1.day];    

[components3 setHour:components2.hour];
[components3 setMinute:components2.minute];
[components3 setSecond:components2.second];         

// Generate a new NSDate from components3.
NSDate *combinedDate = [gregorianCalendar dateFromComponents:components3];   

// combinedDate contains both your date and time!

Для iOS 8.0 +

NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];

// Extract date components into components1
NSDateComponents *components1 = [gregorianCalendar components:(NSCalendarUnit)(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay)
                                                     fromDate:date1];

// Extract time components into components2
NSDateComponents *components2 = [gregorianCalendar components:(NSCalendarUnit)(NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond)
                                                     fromDate:date2];

// Combine date and time into components3
NSDateComponents *components3 = [[NSDateComponents alloc] init];

[components3 setYear:components1.year];
[components3 setMonth:components1.month];
[components3 setDay:components1.day];

[components3 setHour:components2.hour];
[components3 setMinute:components2.minute];
[components3 setSecond:components2.second];

// Generate a new NSDate from components3.
NSDate * combinedDate = [gregorianCalendar dateFromComponents:components3];

// combinedDate contains both your date and time!

Ответ 2

В Swift:

let calendar = NSCalendar.currentCalendar()
let date1 = NSDate() // PickerDateMode
let date2 = NSDate() // PickerHourMode

let componentsOne = calendar.components([.Year, .Month, .Day], fromDate: date1)
let componentsTwo = calendar.components([.Hour, .Minute], fromDate: date2)   

let totalComponents = NSDateComponents()
totalComponents.year = componentsOne.year
totalComponents.month = componentsOne.month
totalComponents.day = componentsOne.day
totalComponents.hour = componentsTwo.hour
totalComponents.minute = componentsTwo.minute

let finalDate = calendar.dateFromComponents(totalComponents)

Ответ 3

NSCalendar *calendar= [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSCalendarUnit unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDate *date = [NSDate date];//datapicker date
NSDateComponents *dateComponents = [calendar components:unitFlags fromDate:date];

NSInteger year = [dateComponents year];
NSInteger month = [dateComponents month];
NSInteger day = [dateComponents day];
NSInteger hour = [dateComponents hour];
NSInteger minute = [dateComponents minute];
NSInteger second = [dateComponents second];