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 4.0(在这个精彩的答案中与Swift 3.0相同,只是为了让像我这样的新手清楚)
let today = Date()
let yesterday = Calendar.current.date(byAdding: .day, value: -1, to: today)
其他回答
Swift 4,如果你真正需要的是24小时轮班(60*60*24秒)而不是“1个日历天”
未来: let dayAhead = Date(timeIntervalSinceNow: TimeInterval(86400.0))
过去: let dayAgo = Date(timeIntervalSinceNow: TimeInterval(-86400.0))
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。
从iOS 8开始,你可以使用NSCalendar.dateByAddingUnit
Swift 1.x中的示例:
let today = NSDate()
let tomorrow = NSCalendar.currentCalendar()
.dateByAddingUnit(
.CalendarUnitDay,
value: 1,
toDate: today,
options: NSCalendarOptions(0)
)
斯威夫特2.0:
let today = NSDate()
let tomorrow = NSCalendar.currentCalendar()
.dateByAddingUnit(
.Day,
value: 1,
toDate: today,
options: []
)
斯威夫特3.0:
let today = Date()
let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: today)
斯威夫特2.0
let today = NSDate()
let calendar = NSCalendar.currentCalendar()
let tomorrow = calendar.dateByAddingUnit(.Day, value: 1, toDate: today, options: NSCalendarOptions.MatchFirst)
swift 5更新
let nextDate = fromDate.addingTimeInterval(60*60*24)