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

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

扩展NSDATE

//swift 3.0.2

extension NSDate
{
func isGreaterThanDate(dateToCompare : NSDate) -> Bool
{
var isGreater = false
if self.compare(dateToCompare as Date) == ComparisonResult.orderedDescending
{ isGreater = true }
return isGreater
}

func isLessThanDate(dateToCompare : NSDate) -> Bool
{
var isLess = false
if self.compare(dateToCompare as Date) == ComparisonResult.orderedAscending
{ isLess = true }
return isLess
}

func addDays(daysToAdd : Int) -> NSDate
{
let secondsInDays : TimeInterval = Double(daysToAdd) * 60 * 60 * 24
let dateWithDaysAdded : NSDate = self.addingTimeInterval(secondsInDays)
return dateWithDaysAdded
}

func addHours(hoursToAdd : Int) -> NSDate
{
let secondsInHours : TimeInterval = Double(hoursToAdd) * 60 * 60
let dateWithHoursAdded : NSDate = self.addingTimeInterval(secondsInHours)
return dateWithHoursAdded
}
}

t’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/