blocks|key|994546|text|从iOS+8开始，您可以使用NSCalendar.dateByAddingUnit|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|994547|Swift+1.x中的示例：|994548|let+today+=+NSDate()
let+tomorrow+=+NSCalendar.currentCalendar()
++++.dateByAddingUnit(
+++++++++.CalendarUnitDay,+
+++++++++value:+1,+
+++++++++toDate:+today,+
+++++++++options:+NSCalendarOptions(0)
++++)|code-block|syntax|javascript|994549|Swift+2.0：|994550|let+today+=+NSDate()
let+tomorrow+=+NSCalendar.currentCalendar()
++++.dateByAddingUnit(
++++++++.Day,+
++++++++value:+1,+
++++++++toDate:+today,+
++++++++options:+[]
++++)|994551|Swift+3.0：|994552|let+today+=+Date()
let+tomorrow+=+Calendar.current.date(byAdding:+.day,+value:+1,+to:+today)|994553|entityMap^0|E|R|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|13|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

Since iOS 8 you can use <code>NSCalendar.dateByAddingUnit</code>

Example in Swift 1.x:

<pre><code>let today = NSDate()
let tomorrow = NSCalendar.currentCalendar()
 .dateByAddingUnit(
 .CalendarUnitDay, 
 value: 1, 
 toDate: today, 
 options: NSCalendarOptions(0)
 )
</code></pre>

Swift 2.0:

<pre><code>let today = NSDate()
let tomorrow = NSCalendar.currentCalendar()
 .dateByAddingUnit(
 .Day, 
 value: 1, 
 toDate: today, 
 options: []
 )
</code></pre>

Swift 3.0:

<pre><code>let today = Date()
let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: today)
</code></pre>

blocks|key|780243|text|iOS+8%2B，OSX+10.9%2B，Objective-C|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780244|NSCalendar+*cal+=+[NSCalendar+currentCalendar];++++
NSDate+*tomorrow+=+[cal+dateByAddingUnit:NSCalendarUnitDay+
+++++++++++++++++++++++++++++++++++value:1+
++++++++++++++++++++++++++++++++++toDate:[NSDate+date]+
+++++++++++++++++++++++++++++++++options:0];|code-block|syntax|javascript|780245|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

iOS 8+, OSX 10.9+, Objective-C

<pre><code>NSCalendar *cal = [NSCalendar currentCalendar]; 
NSDate *tomorrow = [cal dateByAddingUnit:NSCalendarUnitDay 
 value:1 
 toDate:[NSDate date] 
 options:0];
</code></pre>

blocks|key|780620|text|Swift+4的更新：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780621|let+now+=+Date()+//+the+current+date/time
let+oneDayFromNow+=+Calendar.current.date(byAdding:+.day,+value:+1,+to:+now)+//+Tomorrow+with+same+time+of+day+as+now|code-block|syntax|javascript|780622|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Update for Swift 4:
<pre class="lang-swift prettyprint-override"><code>let now = Date() // the current date/time
let oneDayFromNow = Calendar.current.date(byAdding: .day, value: 1, to: now) // Tomorrow with same time of day as now
</code></pre>

blocks|key|780091|text|使用下面的函数和days参数来获得date+daysAhead/daysBehind，只需传递参数作为未来日期的正数或以前日期的负数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780092|%2B+(NSDate+*)+getDate:(NSDate+*)fromDate+daysAhead:(NSUInteger)days
{
++++NSDateComponents+*dateComponents+=+[[NSDateComponents+alloc]+init];
++++dateComponents.day+=+days;
++++NSCalendar+*calendar+=+[NSCalendar+currentCalendar];
++++NSDate+*previousDate+=+[calendar+dateByAddingComponents:dateComponents
+++++++++++++++++++++++++++++++++++++++++++++++++++++toDate:fromDate
++++++++++++++++++++++++++++++++++++++++++++++++++++options:0];
++++[dateComponents+release];
++++return+previousDate;
}|code-block|syntax|javascript|780093|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use the below function and use days paramater to get the date daysAhead/daysBehind just pass parameter as positive for future date or negative for previous dates:

<pre><code>+ (NSDate *) getDate:(NSDate *)fromDate daysAhead:(NSUInteger)days
{
 NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
 dateComponents.day = days;
 NSCalendar *calendar = [NSCalendar currentCalendar];
 NSDate *previousDate = [calendar dateByAddingComponents:dateComponents
 toDate:fromDate
 options:0];
 [dateComponents release];
 return previousDate;
}
</code></pre>

blocks|key|780258|text|在快速的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780259|var+dayComponenet+=+NSDateComponents()
dayComponenet.day+=+1

var+theCalendar+=+NSCalendar.currentCalendar()
var+nextDate+=+theCalendar.dateByAddingComponents(dayComponenet,+toDate:+NSDate(),+options:+nil)|code-block|syntax|javascript|780260|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In swift

<pre><code>var dayComponenet = NSDateComponents()
dayComponenet.day = 1

var theCalendar = NSCalendar.currentCalendar()
var nextDate = theCalendar.dateByAddingComponents(dayComponenet, toDate: NSDate(), options: nil)
</code></pre>

blocks|key|994776|text|它起作用了!|type|unstyled|depth|inlineStyleRanges|entityRanges|data|994777|NSCalendar+*calendar+=+[NSCalendar+currentCalendar];
NSCalendarUnit+unit+=+NSCalendarUnitDay;
NSInteger+value+=+1;
NSDate+*today+=+[NSDate+date];
NSDate+*tomorrow+=+[calendar+dateByAddingUnit:unit+value:value+toDate:today+options:NSCalendarMatchStrictly];|code-block|syntax|javascript|994778|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It works!
<pre><code>NSCalendar *calendar = [NSCalendar currentCalendar];
NSCalendarUnit unit = NSCalendarUnitDay;
NSInteger value = 1;
NSDate *today = [NSDate date];
NSDate *tomorrow = [calendar dateByAddingUnit:unit value:value toDate:today options:NSCalendarMatchStrictly];
</code></pre>

blocks|key|994866|text|Swift+3.0非常简单的实现是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|994867|func+dateByAddingDays(inDays:+Int)+->+Date+{
++++let+today+=+Date()
++++return+Calendar.current.date(byAdding:+.day,+value:+inDays,+to:+today)!
}|code-block|syntax|javascript|994868|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Swift 3.0 very simple implementation would be:

<pre><code>func dateByAddingDays(inDays: Int) -&gt; Date {
 let today = Date()
 return Calendar.current.date(byAdding: .day, value: inDays, to: today)!
}
</code></pre>

blocks|key|994516|text|NSDate+*today=[NSDate+date];
NSCalendar+*calendar+=+[[NSCalendar+alloc]+initWithCalendarIdentifier:+NSGregorianCalendar];
NSDateComponents+*components=[[NSDateComponents+alloc]+init];
components.day=1;
NSDate+*targetDate+=[calendar+dateByAddingComponents:components+toDate:today+options:+0];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|994517|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>NSDate *today=[NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier: NSGregorianCalendar];
NSDateComponents *components=[[NSDateComponents alloc] init];
components.day=1;
NSDate *targetDate =[calendar dateByAddingComponents:components toDate:today options: 0];
</code></pre>

blocks|key|994496|text|NSDateComponents+*dayComponent+=+[[[NSDateComponents+alloc]+init]+autorelease];
dayComponent.day+=+1;

NSCalendar+*theCalendar+=+[NSCalendar+currentCalendar];
dateToBeIncremented+=+[theCalendar+dateByAddingComponents:dayComponent+toDate:dateToBeIncremented+options:0];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|994497|好的--我还以为这对我有用呢。但是，如果您使用它在2013年3月31日添加一天，它将返回一个仅添加了23小时的日期。它实际上可能有24个小时，但在计算中使用只增加了23:00小时。|unstyled|994498|同样，如果向前推进到2013年10月28日，代码将添加25个小时，得到的日期时间为2013-10-28+01:00:00。|994499|为了添加一天，我在顶部做了一件事，添加了：|994500|NSDate+*newDate1+=+[now+dateByAddingTimeInterval:60*60*24*daysToAdd];|994501|很复杂，主要是因为夏令时。|994502|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|M|3|N|5|F|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|F|7|W|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>NSDateComponents *dayComponent = [[[NSDateComponents alloc] init] autorelease];
dayComponent.day = 1;

NSCalendar *theCalendar = [NSCalendar currentCalendar];
dateToBeIncremented = [theCalendar dateByAddingComponents:dayComponent toDate:dateToBeIncremented options:0];
</code></pre>

Ok - I thought this was going to work for me. However, if you use it to add a day to the 31st March 2013, it'll return a date that has only 23 hours added to it. It may well actually have the 24, but using in calculations has only 23:00 hours added.

Similarly, if you blast forward to 28th Oct 2013, the code adds 25 hours resulting in a date time of 2013-10-28 01:00:00.

In order to add a day I was doing the thing at the top, adding the:

<pre><code>NSDate *newDate1 = [now dateByAddingTimeInterval:60*60*24*daysToAdd];
</code></pre>

Complicated, principally due to daylight saving.

blocks|key|780415|text|在Swift+2.1.1和xcode+7.1+OSX+10.10.5中，您可以使用函数添加向前和向后的任意天数|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780416|func+addDaystoGivenDate(baseDate:NSDate,NumberOfDaysToAdd:Int)->NSDate
{
++++let+dateComponents+=+NSDateComponents()
++++let+CurrentCalendar+=+NSCalendar.currentCalendar()
++++let+CalendarOption+=+NSCalendarOptions()

++++dateComponents.day+=+NumberOfDaysToAdd

++++let+newDate+=+CurrentCalendar.dateByAddingComponents(dateComponents,+toDate:+baseDate,+options:+CalendarOption)
++++return+newDate!
}|code-block|syntax|javascript|780417|将当前日期递增9天的函数调用|780418|var+newDate+=+addDaystoGivenDate(NSDate(),+NumberOfDaysToAdd:+9)
print(newDate)|780419|函数调用将当前日期减少80天|780420|newDate+=+addDaystoGivenDate(NSDate(),+NumberOfDaysToAdd:+-80)
+print(newDate)|780421|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

In Swift 2.1.1 and xcode 7.1 OSX 10.10.5 ,you can add any number of days forward and backwards using function

<pre><code>func addDaystoGivenDate(baseDate:NSDate,NumberOfDaysToAdd:Int)-&gt;NSDate
{
 let dateComponents = NSDateComponents()
 let CurrentCalendar = NSCalendar.currentCalendar()
 let CalendarOption = NSCalendarOptions()

 dateComponents.day = NumberOfDaysToAdd

 let newDate = CurrentCalendar.dateByAddingComponents(dateComponents, toDate: baseDate, options: CalendarOption)
 return newDate!
}
</code></pre>

function call for incrementing current date by 9 days

<pre><code>var newDate = addDaystoGivenDate(NSDate(), NumberOfDaysToAdd: 9)
print(newDate)
</code></pre>

function call for decrement current date by 80 days

<pre><code>newDate = addDaystoGivenDate(NSDate(), NumberOfDaysToAdd: -80)
 print(newDate)
</code></pre>

blocks|key|780007|text|您可以在seconds为60+*+60+*+24+=+86400的地方使用NSDate的方法-+(id)dateByAddingTimeInterval:(NSTimeInterval)seconds|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|780008|entityMap^0|4|7|C|K|1A|1I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

You can use NSDate's method <code>- (id)dateByAddingTimeInterval:(NSTimeInterval)seconds</code> where <code>seconds</code> would be <code>60 * 60 * 24 = 86400</code>

blocks|key|780364|text|在swift中，您可以对NSDate中添加方法进行扩展|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780365|extension+NSDate+{
++++func+addNoOfDays(noOfDays:Int)+->+NSDate!+{
++++++++let+cal:NSCalendar+=+NSCalendar.currentCalendar()
++++++++cal.timeZone+=+NSTimeZone(abbreviation:+"UTC")!
++++++++let+comps:NSDateComponents+=+NSDateComponents()
++++++++comps.day+=+noOfDays
++++++++return+cal.dateByAddingComponents(comps,+toDate:+self,+options:+nil)
++++}
}|code-block|syntax|javascript|780366|您可以将其用作|780367|NSDate().addNoOfDays(3)|780368|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In swift you can make extension to add method in NSDate

<pre><code>extension NSDate {
 func addNoOfDays(noOfDays:Int) -&gt; NSDate! {
 let cal:NSCalendar = NSCalendar.currentCalendar()
 cal.timeZone = NSTimeZone(abbreviation: "UTC")!
 let comps:NSDateComponents = NSDateComponents()
 comps.day = noOfDays
 return cal.dateByAddingComponents(comps, toDate: self, options: nil)
 }
}
</code></pre>

you can use this as

<pre><code>NSDate().addNoOfDays(3)
</code></pre>

blocks|key|995072|text|从任何日期开始对昨天和明天的简单Swift扩展：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|995073|extension+Date+{
++++
++++var+previousDay:+Date+{
++++++++Calendar.current.date(byAdding:+DateComponents(day:-1),+to:+self)!
++++}
++++
++++var+nextDay:+Date+{
++++++++Calendar.current.date(byAdding:+DateComponents(day:%2B1),+to:+self)!
++++}
++++
}|code-block|syntax|javascript|995074|我在这里根据问题中的建议强制展开选项：|995075|When+does+dateByAddingComponents:toDate:options+return+nil?|offset|length|995076|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/39358131/when-does-datebyaddingcomponentstodateoptions-return-nil^0|0|0|0|0|1N|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

Simple Swift extensions for yesterday and tomorrow from any date:
<pre><code>extension Date {
 
 var previousDay: Date {
 Calendar.current.date(byAdding: DateComponents(day:-1), to: self)!
 }
 
 var nextDay: Date {
 Calendar.current.date(byAdding: DateComponents(day:+1), to: self)!
 }
 
}
</code></pre>
I'm force unwrapping the optionals based on advice in the question here: 
<a href="https://stackoverflow.com/questions/39358131/when-does-datebyaddingcomponentstodateoptions-return-nil">When does dateByAddingComponents:toDate:options return nil?</a>

blocks|key|780313|text|NSDate+*now+=+[NSDate+date];
int+daysToAdd+=+1;
NSDate+*tomorrowDate+=+[now+dateByAddingTimeInterval:60*60*24*daysToAdd];

NSDateFormatter+*dateFormatter+=+[[NSDateFormatter+alloc]+init];
[dateFormatter+setDateFormat:@"EEEE,+dd+MMM+yyyy"];
NSLog(@"%25@",+[dateFormatter+stringFromDate:tomorrowDate]);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|780314|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>NSDate *now = [NSDate date];
int daysToAdd = 1;
NSDate *tomorrowDate = [now dateByAddingTimeInterval:60*60*24*daysToAdd];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"EEEE, dd MMM yyyy"];
NSLog(@"%@", [dateFormatter stringFromDate:tomorrowDate]);
</code></pre>

blocks|key|994842|text|对于swift+2.2：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|994843|let+today+=+NSDate()
let+tomorrow+=+NSCalendar.currentCalendar().dateByAddingUnit(
++++++++.Day,
++++++++value:+1,
++++++++toDate:+today,
++++++++options:+NSCalendarOptions.MatchStrictly)|code-block|syntax|javascript|994844|希望这对某些人有帮助！|994845|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

for swift 2.2:

<pre><code>let today = NSDate()
let tomorrow = NSCalendar.currentCalendar().dateByAddingUnit(
 .Day,
 value: 1,
 toDate: today,
 options: NSCalendarOptions.MatchStrictly)
</code></pre>

Hope this helps someone!

blocks|key|780178|text|NSDate+*now+=+[NSDate+date];
NSCalendar+*calendar+=+[[NSCalendar+alloc]+initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents+*components+=+[calendar+components:NSYearCalendarUnit%7CNSMonthCalendarUnit%7CNSDayCalendarUnit+fromDate:now];
NSDate+*startDate+=+[calendar+dateFromComponents:components];
NSLog(@"StartDate+=+%25@",+startDate);

components.day+%2B=+1;
NSDate+*endDate+=+[calendar+dateFromComponents:components];
NSLog(@"EndDate+=+%25@",+endDate);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|780179|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>NSDate *now = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:now];
NSDate *startDate = [calendar dateFromComponents:components];
NSLog(@"StartDate = %@", startDate);

components.day += 1;
NSDate *endDate = [calendar dateFromComponents:components];
NSLog(@"EndDate = %@", endDate);
</code></pre>

blocks|key|994672|text|我也有同样的问题；使用NSDate的扩展：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|994673|-+(id)dateByAddingYears:(NSUInteger)years
+++++++++++++++++months:(NSUInteger)months
+++++++++++++++++++days:(NSUInteger)days
++++++++++++++++++hours:(NSUInteger)hours
++++++++++++++++minutes:(NSUInteger)minutes
++++++++++++++++seconds:(NSUInteger)seconds
{
++++NSDateComponents+*+delta+=+[[[NSDateComponents+alloc]+init]+autorelease];
++++NSCalendar+*+gregorian+=+[[[NSCalendar+alloc]
+++++++++++++++++++++++++++++++initWithCalendarIdentifier:NSCalendarIdentifierGregorian]+autorelease];

++++[delta+setYear:years];
++++[delta+setMonth:months];
++++[delta+setDay:days];
++++[delta+setHour:hours];
++++[delta+setMinute:minutes];
++++[delta+setSecond:seconds];

++++return+[gregorian+dateByAddingComponents:delta+toDate:self+options:0];
}|code-block|syntax|javascript|994674|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I had the same problem; use an extension for NSDate:

<pre><code>- (id)dateByAddingYears:(NSUInteger)years
 months:(NSUInteger)months
 days:(NSUInteger)days
 hours:(NSUInteger)hours
 minutes:(NSUInteger)minutes
 seconds:(NSUInteger)seconds
{
 NSDateComponents * delta = [[[NSDateComponents alloc] init] autorelease];
 NSCalendar * gregorian = [[[NSCalendar alloc]
 initWithCalendarIdentifier:NSCalendarIdentifierGregorian] autorelease];

 [delta setYear:years];
 [delta setMonth:months];
 [delta setDay:days];
 [delta setHour:hours];
 [delta setMinute:minutes];
 [delta setSecond:seconds];

 return [gregorian dateByAddingComponents:delta toDate:self options:0];
}
</code></pre>

blocks|key|994860|text|Swift+2.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|994861|let+today+=+NSDate()++++
let+calendar+=+NSCalendar.currentCalendar()
let+tomorrow+=+calendar.dateByAddingUnit(.Day,+value:+1,+toDate:+today,+options:+NSCalendarOptions.MatchFirst)|code-block|syntax|javascript|994862|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Swift 2.0

<pre><code>let today = NSDate() 
let calendar = NSCalendar.currentCalendar()
let tomorrow = calendar.dateByAddingUnit(.Day, value: 1, toDate: today, options: NSCalendarOptions.MatchFirst)
</code></pre>

blocks|key|780575|text|Swift+4，如果你真正需要的是24小时的轮班(60*60*24秒)，而不是"1个日历日“|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780576|未来：let+dayAhead+=+Date(timeIntervalSinceNow:+TimeInterval(86400.0))|offset|length|style|CODE|780577|过去：let+dayAgo+=+Date(timeIntervalSinceNow:+TimeInterval(-86400.0))|780578|entityMap^0|0|3|1S|0|3|1R|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

Swift 4, if all you really need is a 24 hour shift (60*60*24 seconds) and not "1 calendar day"

Future:
<code>let dayAhead = Date(timeIntervalSinceNow: TimeInterval(86400.0))</code>

Past:
<code>let dayAgo = Date(timeIntervalSinceNow: TimeInterval(-86400.0))</code>

blocks|key|780626|text|swift+5的更新|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780627|let+nextDate+=+fromDate.addingTimeInterval(60*60*24)|code-block|syntax|javascript|780628|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

update for swift 5

<pre><code>let nextDate = fromDate.addingTimeInterval(60*60*24)
</code></pre>

blocks|key|780666|text|只是为了好玩，通过一些扩展和操作符重载，你可以得到一些很好的东西，比如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|780667|let+today+=+Date()
let+tomorrow+=+today+%2B+1.days|code-block|syntax|javascript|780668|，或者|780669|var+date+=+Date()
date+%2B=+1.months|780670|以下是支持代码：|780671|extension+Calendar+{
++++struct+ComponentWithValue+{
++++++++let+component:+Component
++++++++let+value:+Int
++++}
}

extension+Int+{
++++var+days:+Calendar.ComponentWithValue+{
++++++++.init(component:+.day,+value:+self)
++++}
++++
++++var+months:+Calendar.ComponentWithValue+{
++++++++.init(component:+.month,+value:+self)
++++}
}

func+%2B(_+date:+Date,+_+amount:+Calendar.ComponentWithValue)+->+Date+{
++++Calendar.current.date(byAdding:+amount.component,+value:+amount.value,+to:+date)!
}

func+%2B(_+amount:+Calendar.ComponentWithValue,+_+date:+Date)+->+Date+{
++++date+%2B+amount
}

func+%2B=(_+date:+inout+Date,+_+amount:+Calendar.ComponentWithValue)+{
++++date+=+date+%2B+amount
}|780672|代码很少，可以很容易地扩展以支持.months、.years、.hours等。还可以无缝添加对减法(-)的支持。|offset|length|style|CODE|780673|但是，在%2B操作符的实现中有一个强制展开，但是不确定在什么情况下日历可以返回空日期。|780674|entityMap^0|0|0|0|0|0|0|G|7|O|6|V|6|1E|1|0|4|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|14|8|@$Q|15|R|16|S|T]|$Q|17|R|18|S|T]|$Q|19|R|1A|S|T]|$Q|1B|R|1C|S|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1D|8|@$Q|1E|R|1F|S|T]]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|X|$]]

Just for fun, with a few extensions and operator overloads, you can end up with something nice, like:
<pre class="lang-swift prettyprint-override"><code>let today = Date()
let tomorrow = today + 1.days
</code></pre>
, or
<pre class="lang-swift prettyprint-override"><code>var date = Date()
date += 1.months
</code></pre>
Below is the support code:
<pre class="lang-swift prettyprint-override"><code>extension Calendar {
 struct ComponentWithValue {
 let component: Component
 let value: Int
 }
}

extension Int {
 var days: Calendar.ComponentWithValue {
 .init(component: .day, value: self)
 }
 
 var months: Calendar.ComponentWithValue {
 .init(component: .month, value: self)
 }
}

func +(_ date: Date, _ amount: Calendar.ComponentWithValue) -&gt; Date {
 Calendar.current.date(byAdding: amount.component, value: amount.value, to: date)!
}

func +(_ amount: Calendar.ComponentWithValue, _ date: Date) -&gt; Date {
 date + amount
}

func +=(_ date: inout Date, _ amount: Calendar.ComponentWithValue) {
 date = date + amount
}
</code></pre>
The code is minimal, and can be easily extended to allow <code>.months</code>, <code>.years</code>, <code>.hours</code>, etc. Also support for subtraction (<code>-</code>) can be seamlessly added.
There is a forced unwrap, though, within the implementation of the <code>+</code> operator, however not sure under which circumstances can the calendar return a nil date.

blocks|key|994408|text|使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|994409|NSDate+*now+=+[NSDate+date];
int+daysToAdd+=+1;
NSDate+*newDate1+=+[now+dateByAddingTimeInterval:60*60*24*daysToAdd];|code-block|syntax|javascript|994410|作为|994411|addTimeInterval|994412|现在已被弃用。|994413|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Use following code:

<pre><code>NSDate *now = [NSDate date];
int daysToAdd = 1;
NSDate *newDate1 = [now dateByAddingTimeInterval:60*60*24*daysToAdd];
</code></pre>

As

<pre><code>addTimeInterval
</code></pre>

is now deprecated.

Basically, as the title says. I'm wondering how I could add 1 day to an <code>NSDate</code>.

So if it were:

<pre><code>21st February 2011
</code></pre>

It would become:

<pre><code>22nd February 2011
</code></pre>

Or if it were:

<pre><code>31st December 2011
</code></pre>

It would become:

<pre><code>1st January 2012.
</code></pre>

How do I add 1 day to an NSDate?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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基本上，正如标题所说。我想知道怎样才能给NSDate增加一天的时间。所以如果是的话：21st February 2011它将变成：22nd February 2011如果是这样的话：31st December 2011它将变成：1st January 2012.

问如何为NSDate添加1天？
EN

回答 22

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问如何为NSDate添加1天？EN

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问如何为NSDate添加1天？
EN