如何在NSDate中添加1天？

本文翻译自：How do I add 1 day to an NSDate?

Basically, as the title says. 基本上，正如标题所说。 I'm wondering how I could add 1 day to an NSDate . 我想知道如何在NSDate加1天。

So if it were: 如果它是：

21st February 2011

It would become: 它会变成：

22nd February 2011

Or if it were: 或者如果是：

31st December 2011

It would become: 它会变成：

1st January 2012.

---

#1楼

参考：https://stackoom.com/question/LGMT/如何在NSDate中添加-天

---

#2楼

Use following code: 使用以下代码：

NSDate *now = [NSDate date]; int daysToAdd = 1; NSDate *newDate1 = [now dateByAddingTimeInterval:60*60*24*daysToAdd];

As 如

addTimeInterval

is now deprecated. 现已弃用。

---

#3楼

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: 使用以下函数并使用days paramater获取日期daysAhead / daysBehind只是将参数传递为将来日期的正数或以前日期的负数：

+ (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; }

---

#4楼

NSDateComponents *dayComponent = [[[NSDateComponents alloc] init] autorelease]; dayComponent.day = 1; NSCalendar *theCalendar = [NSCalendar currentCalendar]; dateToBeIncremented = [theCalendar dateByAddingComponents:dayComponent toDate:dateToBeIncremented options:0];

Ok - I thought this was going to work for me. 好的 - 我认为这对我有用。 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. 但是，如果您使用它来添加一天到2013年3月31日，它将返回一个仅添加23小时的日期。 It may well actually have the 24, but using in calculations has only 23:00 hours added. 它实际上可能有24，但在计算中使用只增加了23:00小时。

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. 同样，如果您向前推进至2013年10月28日，则代码会增加25小时，从而导致日期时间为2013-10-28 01:00:00。

In order to add a day I was doing the thing at the top, adding the: 为了增加一天，我在顶部做了一件事，添加：

NSDate *newDate1 = [now dateByAddingTimeInterval:60*60*24*daysToAdd];

Complicated, principally due to daylight saving. 复杂，主要是由于夏令时。

---

#5楼

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];

---

#6楼

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);