我试图得到当前日期之间的差异作为NSDate()和日期从一个PHP时间();调用例如:NSDate(timeintervalsincerely eferencedate: 1417147270)。我怎样才能得到这两个日期之间的时间差呢?我想有一个函数，比较两个日期，如果(秒> 60)，那么它返回分钟，如果(分钟> 60)返回小时，如果(小时> 24)返回天，等等。
我该怎么做呢?
编辑:目前接受的答案完全符合我的想法。为了便于使用，我推荐使用它，以便以PHP time()函数使用的形式获取两个日期之间的时间。如果你不是特别熟悉PHP，这是1970年1月1日的时间，单位是秒。这对于PHP的后端是有益的。如果你正在使用像NodeJS这样的后端，你可能会考虑下面的其他选项。
当前回答
对于XCode版本8.3.3和Swift 3.0:
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .medium
dateFormatter.timeStyle = .short
var beginDate = "2017-08-24 12:00:00"
var endDate = "2017-09-07 12:00:00"
let startDateTime = dateFormatter.date(from: beginDate) //according to date format your date string
print(startDateTime ?? "") //Convert String to Date
let endDateTime = dateFormatter.date(from: endDate) //according to date format your date string
print(endDateTime ?? "") //Convert String to Date
let dateComponentsFormatter = DateComponentsFormatter()
dateComponentsFormatter.allowedUnits = [NSCalendar.Unit.minute,NSCalendar.Unit.hour,NSCalendar.Unit.day]
let interval = endDateTime!.timeIntervalSince(startDateTime!)
var diff = dateComponentsFormatter.string(from: interval)!
print(diff)
var day_i = 0
var hour_i = 0
var min_i = 0
if (diff.contains("d"))
{
let day = diff.substring(to: (diff.range(of: "d")?.lowerBound)!)
day_i = Int(day)!
print ("day --> \(day_i)")
diff = diff.substring(from:(diff.range(of : " ")?.upperBound )!)
print(diff)
}
let hour = diff.substring(to: (diff.range(of : ":")?.lowerBound )!)
hour_i = Int(hour)!
print ("hour --> \(hour_i)")
let min = diff.substring(from: (diff.range(of : ":")?.upperBound )!)
min_i = Int(min)!
print ("min --> \(min_i)")
其他回答
对于XCode版本8.3.3和Swift 3.0:
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .medium
dateFormatter.timeStyle = .short
var beginDate = "2017-08-24 12:00:00"
var endDate = "2017-09-07 12:00:00"
let startDateTime = dateFormatter.date(from: beginDate) //according to date format your date string
print(startDateTime ?? "") //Convert String to Date
let endDateTime = dateFormatter.date(from: endDate) //according to date format your date string
print(endDateTime ?? "") //Convert String to Date
let dateComponentsFormatter = DateComponentsFormatter()
dateComponentsFormatter.allowedUnits = [NSCalendar.Unit.minute,NSCalendar.Unit.hour,NSCalendar.Unit.day]
let interval = endDateTime!.timeIntervalSince(startDateTime!)
var diff = dateComponentsFormatter.string(from: interval)!
print(diff)
var day_i = 0
var hour_i = 0
var min_i = 0
if (diff.contains("d"))
{
let day = diff.substring(to: (diff.range(of: "d")?.lowerBound)!)
day_i = Int(day)!
print ("day --> \(day_i)")
diff = diff.substring(from:(diff.range(of : " ")?.upperBound )!)
print(diff)
}
let hour = diff.substring(to: (diff.range(of : ":")?.lowerBound )!)
hour_i = Int(hour)!
print ("hour --> \(hour_i)")
let min = diff.substring(from: (diff.range(of : ":")?.upperBound )!)
min_i = Int(min)!
print ("min --> \(min_i)")
使用以下代码:
let registrationDateString = "2008-10-06 00:00:00"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss"
if let registrationDate = dateFormatter.date(from: registrationDateString) {
let currentDate = Date()
let dateDifference = Calendar.current.dateComponents([.day, .month, .year],
from: registrationDate,
to: currentDate)
print("--------------------- Result: \(dateDifference.year ?? 0) years \(dateDifference.month ?? 0) months and \(dateDifference.day ?? 0) days")
} else {
print("--------------------- No result")
}
结果:10年1个月18天
——>使用这个找到时间差距在两个日期在Swift(与两个字符串)。
func timeGapBetweenDates(previousDate : String,currentDate : String)
{
let dateString1 = previousDate
let dateString2 = currentDate
let Dateformatter = DateFormatter()
Dateformatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let date1 = Dateformatter.date(from: dateString1)
let date2 = Dateformatter.date(from: dateString2)
let distanceBetweenDates: TimeInterval? = date2?.timeIntervalSince(date1!)
let secondsInAnHour: Double = 3600
let minsInAnHour: Double = 60
let secondsInDays: Double = 86400
let secondsInWeek: Double = 604800
let secondsInMonths : Double = 2592000
let secondsInYears : Double = 31104000
let minBetweenDates = Int((distanceBetweenDates! / minsInAnHour))
let hoursBetweenDates = Int((distanceBetweenDates! / secondsInAnHour))
let daysBetweenDates = Int((distanceBetweenDates! / secondsInDays))
let weekBetweenDates = Int((distanceBetweenDates! / secondsInWeek))
let monthsbetweenDates = Int((distanceBetweenDates! / secondsInMonths))
let yearbetweenDates = Int((distanceBetweenDates! / secondsInYears))
let secbetweenDates = Int(distanceBetweenDates!)
if yearbetweenDates > 0
{
print(yearbetweenDates,"years")//0 years
}
else if monthsbetweenDates > 0
{
print(monthsbetweenDates,"months")//0 months
}
else if weekBetweenDates > 0
{
print(weekBetweenDates,"weeks")//0 weeks
}
else if daysBetweenDates > 0
{
print(daysBetweenDates,"days")//5 days
}
else if hoursBetweenDates > 0
{
print(hoursBetweenDates,"hours")//120 hours
}
else if minBetweenDates > 0
{
print(minBetweenDates,"minutes")//7200 minutes
}
else if secbetweenDates > 0
{
print(secbetweenDates,"seconds")//seconds
}
}
Leo Dabus回答的一个小补充，提供复数版本，更易于人类阅读。
斯威夫特3
extension Date {
/// Returns the amount of years from another date
func years(from date: Date) -> Int {
return Calendar.current.dateComponents([.year], from: date, to: self).year ?? 0
}
/// Returns the amount of months from another date
func months(from date: Date) -> Int {
return Calendar.current.dateComponents([.month], from: date, to: self).month ?? 0
}
/// Returns the amount of weeks from another date
func weeks(from date: Date) -> Int {
return Calendar.current.dateComponents([.weekOfMonth], from: date, to: self).weekOfMonth ?? 0
}
/// Returns the amount of days from another date
func days(from date: Date) -> Int {
return Calendar.current.dateComponents([.day], from: date, to: self).day ?? 0
}
/// Returns the amount of hours from another date
func hours(from date: Date) -> Int {
return Calendar.current.dateComponents([.hour], from: date, to: self).hour ?? 0
}
/// Returns the amount of minutes from another date
func minutes(from date: Date) -> Int {
return Calendar.current.dateComponents([.minute], from: date, to: self).minute ?? 0
}
/// Returns the amount of seconds from another date
func seconds(from date: Date) -> Int {
return Calendar.current.dateComponents([.second], from: date, to: self).second ?? 0
}
/// Returns the a custom time interval description from another date
func offset(from date: Date) -> String {
if years(from: date) == 1 { return "\(years(from: date)) year" } else if years(from: date) > 1 { return "\(years(from: date)) years" }
if months(from: date) == 1 { return "\(months(from: date)) month" } else if months(from: date) > 1 { return "\(months(from: date)) month" }
if weeks(from: date) == 1 { return "\(weeks(from: date)) week" } else if weeks(from: date) > 1 { return "\(weeks(from: date)) weeks" }
if days(from: date) == 1 { return "\(days(from: date)) day" } else if days(from: date) > 1 { return "\(days(from: date)) days" }
if hours(from: date) == 1 { return "\(hours(from: date)) hour" } else if hours(from: date) > 1 { return "\(hours(from: date)) hours" }
if minutes(from: date) == 1 { return "\(minutes(from: date)) minute" } else if minutes(from: date) > 1 { return "\(minutes(from: date)) minutes" }
return ""
}
}
在jose920405中添加了一些答案，使其与Swift 3.0及以上版本兼容
func getDateTimeDiff(dateStr:String) -> String {
let formatter : DateFormatter = DateFormatter()
formatter.timeZone = NSTimeZone.local
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let now = formatter.string(from: NSDate() as Date)
let startDate = formatter.date(from: dateStr)
let endDate = formatter.date(from: now)
// *** create calendar object ***
var calendar = NSCalendar.current
// *** Get components using current Local & Timezone ***
print(calendar.dateComponents([.year, .month, .day, .hour, .minute, .second], from: startDate!))
// *** define calendar components to use as well Timezone to UTC ***
let unitFlags = Set<Calendar.Component>([.year, .month, .day, .hour, .minute, .second])
calendar.timeZone = TimeZone(identifier: "UTC")!
let dateComponents = calendar.dateComponents(unitFlags, from: startDate!, to: endDate!)
// *** Get Individual components from date ***
let years = dateComponents.year!
let months = dateComponents.month!
let days = dateComponents.day!
let hours = dateComponents.hour!
let minutes = dateComponents.minute!
let seconds = dateComponents.second!
var timeAgo = ""
if (seconds > 0){
if seconds < 2 {
timeAgo = "Second Ago"
}
else{
timeAgo = "\(seconds) Second Ago"
}
}
if (minutes > 0){
if minutes < 2 {
timeAgo = "Minute Ago"
}
else{
timeAgo = "\(minutes) Minutes Ago"
}
}
if(hours > 0){
if hours < 2 {
timeAgo = "Hour Ago"
}
else{
timeAgo = "\(hours) Hours Ago"
}
}
if (days > 0) {
if days < 2 {
timeAgo = "Day Ago"
}
else{
timeAgo = "\(days) Days Ago"
}
}
if(months > 0){
if months < 2 {
timeAgo = "Month Ago"
}
else{
timeAgo = "\(months) Months Ago"
}
}
if(years > 0){
if years < 2 {
timeAgo = "Year Ago"
}
else{
timeAgo = "\(years) Years Ago"
}
}
DLog("timeAgo is ===> \(timeAgo)")
return timeAgo;
}
