如何以整数格式获得NSDate day、month和year ?

I want to get the day, month and year components of NSDate in integer form i.e. if the date is 1/2/1988 then I should get 1, 2 and 1988 separately as an integer. How can I do this in iOS? I found the similar question but the method descriptionWithCalendarFormat: gives a warning and seems to be deprecated by now.

我想用整数形式得到NSDate的日期，月份和年份，也就是说，如果日期是1988年1/2，那么我应该将1、2和1988分别作为整数。在iOS里我怎么做呢?我发现了类似的问题，但方法描述采用了calendarformat:给出了一个警告，现在似乎已经弃用了。

9 个解决方案

#1

Here you are,

给你,

NSDate *currentDate = [NSDate date];
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:currentDate]; // Get necessary date components

 [components month]; //gives you month
 [components day]; //gives you day
 [components year]; // gives you year

You can use NSDateComponents for that as above.

您可以使用NSDateComponents进行上述操作。

Please visit this page for details.

详情请浏览此网页。

Hope it helps.

希望它可以帮助。

#2

Yes by the use of NSCalendar, though, i think this will make your work.

是的，通过使用NSCalendar，我认为这将使你的工作。

NSDateComponents *components = [[NSCalendar currentCalendar] components:NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit fromDate:[NSDate date]];
NSInteger day = [components day];    
NSInteger month = [components month];
NSInteger year = [components year];

#3

Swift

斯威夫特

let components = NSCalendar.currentCalendar().components([.Day, .Month, .Year], fromDate: self)
let day = components.day
let month = components.month
let year = components.year

For convenience you can put this in an NSDate extension and make it return a tuple:

为了方便起见，您可以将其放入NSDate扩展中，并使其返回一个tuple:

extension NSDate: Comparable {

    var dayMonthYear: (Int, Int, Int) {
        let components = NSCalendar.currentCalendar().components([.Day, .Month, .Year], fromDate: self)
        return (components.day, components.month, components.year)
    }
}

Now you have to write only:

现在你只需要写下:

let (day, month, year) = date.dayMonthYear

If you wanted to e.g. get only the the year you can write:

如果你想要，例如，只得到你能写的年份:

let (_, _, year) = date.dayMonthYear

#4

You can use NSDateComponents to get this,

你可以用NSDateComponents得到这个，

NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
NSDate *currDate = [NSDate date];
NSDateComponents *dComp = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit ) 
                                      fromDate:currDate];

int day = [dComp day];
int month = [dComp month];
int year = [dComp year];

#5

To those who just copy and paste directly from the web, like me, this is a small update for iOS 8

对于那些像我一样直接从网络上复制粘贴的人来说，这是iOS 8的一个小更新

NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:[NSDate date]];
[components day]; //Day
[components month];//Month
[components year];//Year

The difference is NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay NSMonthCalendarUnit | NSDayCalendarUnit | NSYearCalendarUnit | NSWeekdayCalendarUnit have been deprecated

差异是NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay nsmonth， | nscalendar， | nsyeararunit | nsweekdaycalendar，已经被弃用

#6

Put it in an extension and live your life ????????

extension Date{
    var day:Int {return Calendar.current.component(.day, from:self)}
    var month:Int {return Calendar.current.component(.month, from:self)}
    var year:Int {return Calendar.current.component(.year, from:self)}
}
Date().day//22
Date().month//4
Date().year//2017

Swift 3.0 (It's an iteration of previous answers, but solves it for all your future app projects)

Swift 3.0(这是对以前答案的重复，但为所有未来的应用项目提供了解决方案)

#7

U can try this .......

你可以试试这个程序。

Mycal = [NSCalendar currentCalendar];
today = [NSDate date];
compA =[Mycal components:(NSMonthCalendarUnit | NSDayCalendarUnit | NSYearCalendarUnit | NSWeekdayCalendarUnit) fromDate:today];     
FirstDateofMonth=[today dateByAddingTimeInterval:([compA day]-1)*(-24*60*60)];

compA =[Mycal components:(NSMonthCalendarUnit | NSDayCalendarUnit | NSYearCalendarUnit | NSWeekdayCalendarUnit) fromDate:FirstDateofMonth];
today = FirstDateofMonth;
compA = [Mycal components:(NSMonthCalendarUnit | NSDayCalendarUnit | NSYearCalendarUnit | NSWeekdayCalendarUnit) fromDate:today];
[compA setMonth:([compA month])];
[self DrawMonthInPortraitView];
[compA retain];

#8

NSDate *currentDate = [NSDate date];
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:currentDate]; // Get necessary date components

[components month]; //gives you month
[components day]; //gives you day
[components year]; // gives you year

NSString *temp=[NSString stringWithFormat:@"Months:%d Day:%d Year:%d",[components month],  [components day],[components year]];
NSLog(@"%@",temp);

#9

let date = Date()
let calendar = Calendar.current

let year = calendar.component(.year, from: date)
let month = calendar.component(.month, from: date)
let day = calendar.component(.day, from: date)
print("hours = \(year):\(month):\(day)")