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
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
其他回答
Swift 5.0:
var dayComponent = DateComponents()
dayComponent.day = 1 // For removing one day (yesterday): -1
let theCalendar = Calendar.current
let nextDate = theCalendar.date(byAdding: dayComponent, to: Date())
print("nextDate : \(nextDate)")
目标C:
NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
dayComponent.day = 1;
NSCalendar *theCalendar = [NSCalendar currentCalendar];
NSDate *nextDate = [theCalendar dateByAddingComponents:dayComponent toDate:[NSDate date] options:0];
NSLog(@"nextDate: %@ ...", nextDate);
这应该是不言而喻的。
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)
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];
它的工作原理!
NSCalendar *calendar = [NSCalendar currentCalendar];
NSCalendarUnit unit = NSCalendarUnitDay;
NSInteger value = 1;
NSDate *today = [NSDate date];
NSDate *tomorrow = [calendar dateByAddingUnit:unit value:value toDate:today options:NSCalendarMatchStrictly];
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)