nstimeinterval

I have linked up an app that I have made to an Firebase database. The app sends Firebase the time as a timeIntervalSinceReferenceDate when a button is pressed. An example of the value is - 498898978852.928 . I want this number to distinguish wether the user has pressed that same button more less than 48 hours ago. Is there a way to measure the time period of 48 hours or should I use a different method? I am using swift 2 and Xcode 7! Swift 3. If you are using Swift 2, use NSDate //the first button press, this is a double but assume it's a timeInterval let firstPress = 498898978.928 let date =

i don't understand this example from the doc : the timeIntervalSinceNow method should show a positive value, but how can we reach "5" as mentioned in the code? (i think it's either 0 more or less, or -10 , -20, -30 etc... but how can we get a positive value such as 5?) : - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { // test the age of the location measurement to determine if the measurement is cached // in most cases you will not want to rely on cached measurements NSTimeInterval locationAge = -

I have got two timevalues in the format: %H%M%S (E.G.161500) These values are text-based integers. Is there a simple function in Cocoa that calculates the difference between these two integers using a 60 seconds and minutes scale? So if time 1 = 161500 time 2 = 171500 timedifference = 003000 NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease]; [dateFormatter setDateFormat:@"HHmmss"]; NSDate *date1 = [dateFormatter dateFromString:@"161500"]; NSDate *date2 = [dateFormatter dateFromString:@"171500"]; NSTimeInterval diff = [date2 timeIntervalSinceDate:date1]; // diff =

How to covert the NSTimeInterval to NSString? I have NSTimeInterval today = [[NSDate date] timeIntervalSince1970]; I have to give "today" as input as NSString. NSTimeInterval is just a double type so you can convert it to string using +stringWithFormat: method NSTimeInterval today = [[NSDate date] timeIntervalSince1970]; NSString *intervalString = [NSString stringWithFormat:@"%f", today]; 来源： https://stackoverflow.com/questions/4278129/convert-nstimeinterval-to-nsstring-in-iphone

I have set a NSTimer.scheduledTimerWithTimeInterval method which has an interval every 20 minutes. I want to be able to find out how much time is left when the the app goes into background mode. How do I find out how much time is left from the interval? Thanks You have access to a NSTimer's fireDate , which tells you when the timer is going to fire again. The difference between now and the fireDate is an interval you can calculate using NSDate's timeIntervalSinceDate API . E.G. something like: let fireDate = yourTimer.fireDate let nowDate = NSDate() let remainingTimeInterval = nowDate

I have the following code: NSDate *dateNow = [[NSDate alloc] init]; NSTimeInterval timeDifference = [usersDate timeIntervalSinceDate:dateNow]; // Get the system calendar NSCalendar *sysCalendar = [NSCalendar currentCalendar]; // Create the NSDates NSDate *date1 = [[NSDate alloc] init]; NSDate *date2 = [[NSDate alloc] initWithTimeInterval:timeDifference sinceDate:date1]; // Get conversion to months, days, hours, minutes unsigned int unitFlags = NSWeekCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSSecondCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSDayCalendarUnit |