Swift日期比较函数 记录下 Comparing date in Swift

Posted 2020-08-27 布袋的世界

Add this code to your project and comparing dates is easier than ever

扩展NSDATE

extension NSDate
{
 func isGreaterThanDate(dateToCompare : NSDate) -> Bool
 {
 var isGreater = false
 if self.compare(dateToCompare) == NSComparisonResult.OrderedDescending
   { isGreater = true }
   return isGreater
 }

 func isLessThanDate(dateToCompare : NSDate) -> Bool
 {
 var isLess = false
 if self.compare(dateToCompare) == NSComparisonResult.OrderedAscending
   { isLess = true }
   return isLess
 }
 
 func addDays(daysToAdd : Int) -> NSDate
 {
   var secondsInDays : NSTimeInterval = Double(daysToAdd) * 60 * 60 * 24
   var dateWithDaysAdded : NSDate = self.dateByAddingTimeInterval(secondsInDays)
   return dateWithDaysAdded
 }
 
 func addHours(hoursToAdd : Int) -> NSDate
 {
   var secondsInHours : NSTimeInterval = Double(hoursToAdd) * 60 * 60
   var dateWithHoursAdded : NSDate = self.dateByAddingTimeInterval(secondsInHours)
   return dateWithHoursAdded
 }
}

It’s easy to use. Here’s a couple of examples

在.SWIFT调用就行了，EASY的很！

 

var today = NSDate()
var oneHourFromNow = today.addHours(1)
if today.isGreaterThanDate(oneHourFromNow) {
  println("Something is terrebly wrong.")
}
var aWeekFromNow = today.addDays(7)

 

原文链接：http://myxcode.net/2015/08/30/comparing-dates-in-swift/