基本上,就像标题说的那样。我想知道如何添加1天的NSDate。
如果它是:
21st February 2011
它将变成:
22nd February 2011
或者如果它是:
31st December 2011
它将变成:
1st January 2012.
基本上,就像标题说的那样。我想知道如何添加1天的NSDate。
如果它是:
21st February 2011
它将变成:
22nd February 2011
或者如果它是:
31st December 2011
它将变成:
1st January 2012.
当前回答
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]);
其他回答
使用以下代码:
NSDate *now = [NSDate date];
int daysToAdd = 1;
NSDate *newDate1 = [now dateByAddingTimeInterval:60*60*24*daysToAdd];
As
addTimeInterval
现在已弃用。
使用下面的函数,并使用days参数来获取日期daysAhead/daysBehind,只需将参数传递为正,表示未来日期,为负,表示之前日期:
+ (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;
}
斯威夫特4.0
extension Date {
func add(_ unit: Calendar.Component, value: Int) -> Date? {
return Calendar.current.date(byAdding: unit, value: value, to: self)
}
}
使用
date.add(.day, 3)! // adds 3 days
date.add(.day, -14)! // subtracts 14 days
注意:如果你不知道为什么代码行以感叹号结尾,可以在谷歌上查找“Swift optional”。
斯威夫特5
let today = Date()
let nextDate = Calendar.current.date(byAdding: .day, value: 1, to: today)
objective - c
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
// now build a NSDate object for the next day
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];
[offsetComponents setDay:1];
NSDate *nextDate = [gregorian dateByAddingComponents:offsetComponents toDate: [NSDate date] options:0];
iOS 8+, OSX 10.9+, Objective-C
NSCalendar *cal = [NSCalendar currentCalendar];
NSDate *tomorrow = [cal dateByAddingUnit:NSCalendarUnitDay
value:1
toDate:[NSDate date]
options:0];