NSDate *date1 = [NSDate dateWithString:@"2010-01-01 00:00:00 +0000"];
NSDate *date2 = [NSDate dateWithString:@"2010-02-03 00:00:00 +0000"];
NSTimeInterval secondsBetween = [date2 timeIntervalSinceDate:date1];
int numberOfDays = secondsBetween / 86400;
NSLog(@"There are %d days in between the two dates.", numberOfDays);
Remember, NSDate
objects represent exact moments of time, they do not have any associated time-zone information. When you convert a string to a date using e.g. an NSDateFormatter
, the NSDateFormatter
converts the time from the configured timezone. Therefore, the number of seconds between two NSDate
objects will always be time-zone-agnostic.
Furthermore, this documentation specifies that Cocoa's implementation of time does not account for leap seconds, so if you require such accuracy, you will need to roll your own implementation.
You may want to use something like this:
NSDateComponents *components;
NSInteger days;
components = [[NSCalendar currentCalendar] components: NSDayCalendarUnit
fromDate: startDate toDate: endDate options: 0];
days = [components day];
I believe this method accounts for situations such as dates that span a change in daylight savings.
NSTimeInterval diff = [date2 timeIntervalSinceDate:date1]; // in seconds
where date1
and date2
are NSDate
's.
Also, note the definition of NSTimeInterval
:
typedef double NSTimeInterval;
Checkout this out. It takes care of daylight saving , leap year as it used iOS calendar to calculate.You can change the string and conditions to includes minutes with hours and days.
+(NSString*)remaningTime:(NSDate*)startDate endDate:(NSDate*)endDate
{
NSDateComponents *components;
NSInteger days;
NSInteger hour;
NSInteger minutes;
NSString *durationString;
components = [[NSCalendar currentCalendar] components: NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute fromDate: startDate toDate: endDate options: 0];
days = [components day];
hour = [components hour];
minutes = [components minute];
if(days>0)
{
if(days>1)
durationString=[NSString stringWithFormat:@"%d days",days];
else
durationString=[NSString stringWithFormat:@"%d day",days];
return durationString;
}
if(hour>0)
{
if(hour>1)
durationString=[NSString stringWithFormat:@"%d hours",hour];
else
durationString=[NSString stringWithFormat:@"%d hour",hour];
return durationString;
}
if(minutes>0)
{
if(minutes>1)
durationString = [NSString stringWithFormat:@"%d minutes",minutes];
else
durationString = [NSString stringWithFormat:@"%d minute",minutes];
return durationString;
}
return @"";
}
With Swift 5 and iOS 12, according to your needs, you may use one of the two following ways to find the difference between two dates in days.
Calendar
's dateComponents(_:from:to:)
methodimport Foundation
let calendar = Calendar.current
let startDate = calendar.date(from: DateComponents(year: 2010, month: 11, day: 22))!
let endDate = calendar.date(from: DateComponents(year: 2015, month: 5, day: 1))!
let dateComponents = calendar.dateComponents([Calendar.Component.day], from: startDate, to: endDate)
print(dateComponents) // prints: day: 1621 isLeapMonth: false
print(String(describing: dateComponents.day)) // prints: Optional(1621)
DateComponentsFormatter
's string(from:to:)
methodimport Foundation
let calendar = Calendar.current
let startDate = calendar.date(from: DateComponents(year: 2010, month: 11, day: 22))!
let endDate = calendar.date(from: DateComponents(year: 2015, month: 5, day: 1))!
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .full
formatter.allowedUnits = [NSCalendar.Unit.day]
let elapsedTime = formatter.string(from: startDate, to: endDate)
print(String(describing: elapsedTime)) // prints: Optional("1,621 days")
Swift 4
Try this and see (date range with String):
// Start & End date string
let startingAt = "01/01/2018"
let endingAt = "08/03/2018"
// Sample date formatter
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy"
// start and end date object from string dates
var startDate = dateFormatter.date(from: startingAt) ?? Date()
let endDate = dateFormatter.date(from: endingAt) ?? Date()
// Actual operational logic
var dateRange: [String] = []
while startDate <= endDate {
let stringDate = dateFormatter.string(from: startDate)
startDate = Calendar.current.date(byAdding: .day, value: 1, to: startDate) ?? Date()
dateRange.append(stringDate)
}
print("Resulting Array - \(dateRange)")
Swift 3
var date1 = Date(string: "2010-01-01 00:00:00 +0000")
var date2 = Date(string: "2010-02-03 00:00:00 +0000")
var secondsBetween: TimeInterval = date2.timeIntervalSince(date1)
var numberOfDays: Int = secondsBetween / 86400
print(numberOfDays)
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