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
swift 5更新
let nextDate = fromDate.addingTimeInterval(60*60*24)
其他回答
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]);
在Swift 2.1.1和xcode 7.1 OSX 10.10.5中,你可以使用函数添加任意数量的天数
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!
}
函数调用,将当前日期增加9天
var newDate = addDaystoGivenDate(NSDate(), NumberOfDaysToAdd: 9)
print(newDate)
函数调用,将当前日期减少80天
newDate = addDaystoGivenDate(NSDate(), NumberOfDaysToAdd: -80)
print(newDate)
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];
简单的Swift扩展昨天和明天从任何日期:
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)!
}
}
我在这里根据问题中的建议强制展开可选选项: 何时dateByAddingComponents:toDate:options返回nil?
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”。