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
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);
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]);
这是一个通用的方法,它允许您在指定的日期中添加/减去任何类型的单位(年/月/日/小时/秒等)。
使用Swift 2.2
func addUnitToDate(unitType: NSCalendarUnit, number: Int, date:NSDate) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(
unitType,
value: number,
toDate: date,
options: NSCalendarOptions(rawValue: 0))!
}
print( addUnitToDate(.Day, number: 1, date: NSDate()) ) // Adds 1 Day To Current Date
print( addUnitToDate(.Hour, number: 1, date: NSDate()) ) // Adds 1 Hour To Current Date
print( addUnitToDate(.Minute, number: 1, date: NSDate()) ) // Adds 1 Minute To Current Date
// NOTE: You can use negative values to get backward values too
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)
iOS 8+, OSX 10.9+, Objective-C
NSCalendar *cal = [NSCalendar currentCalendar];
NSDate *tomorrow = [cal dateByAddingUnit:NSCalendarUnitDay
value:1
toDate:[NSDate date]
options:0];