nstimeinterval

问题 I mean 12:01:00, 12:02:00 ... In iOS7, I want to call a method when minute of time is changed. In other words, if now is 01:55:47, then I want to call a method at 01:56:00 -> 01:57:00 -> 01:58:00 ... All I found about call a method is just about TimeInterval, but not I want. I've tried this code: NSTimeInterval roundedInterval = round([[NSDate date] timeIntervalSinceReferenceDate] / 60.0) * 60.0; NSDate *date = [NSDate dateWithTimeIntervalSinceReferenceDate:roundedInterval]; NSTimer *timer =

问题 here is my question: Is it possible to increase the scheduledTimerWithTimeInterval:2 for example of "3" after 10 seconds in ViewDidLoad for example. E.g., from this: [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(createNewImage) userInfo:nil repeats:YES]; to this: [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(createNewImage) userInfo:nil repeats:YES]; thank you sorry for my english I french :/ 回答1: Reschedule the timer recursively like this

问题 anyone know or can provide some example code relating to "timeIntervalSinceNow" method... I need something like... time2(when app eneters foreground) - time1(when app enters background) = time3(the difference in times)... this is so i can use this number(pref in seconds) to calculate the time i have lost while the app has been in background !! I am having trying trying to create the date objects, receive the object and display/use in a label.... 回答1: timeIntervalSinceNow tells you the offset

问题 I have the following code in my application in the method updateLabel2 : timeLeft = [[NSDate date] timeIntervalSinceDate:[[NSUserDefaults standardUserDefaults] objectForKey:@"lastDate"]]; [[self timer] setText:[NSString stringWithFormat:@"Time Remaining: %f", timeLeft]]; //Set the label text Note that timer is a label. and earlier, the following code is executed: [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:@"lastDate"]; self.repeatTimer = [NSTimer

问题 I have a Progress view bar that I would like to use to indicate time. This is my first project in Swift, and I am unsure how to go about this. So any help/ advise would be appreciated ... (Using Xcode 7.2 and Swift 2.0) Below Is my view controller. When 'btnPlaySession' is triggered, the content on the view controller is changed every 20 seconds. While the timer is counting to 20, id like to indicate this with the progress bar (so the progress bar resets, each time the content changes). class

问题 I tried something like this: var calendar = Calendar.current var dayFutureComponents = DateComponents() dayFutureComponents.day = 1 // aka 1 day var d = calendar.date(byAdding: dayFutureComponents, to: Date()) ...//setting of d.hour, d.minute, d.second to zero and finding the difference between 2 dates The problem is for example my current GMT is +3 . So the result differs from one I need to achieve by 3 hours. How to fix this issue? 回答1: First create a Calendar for the UTC timezone. Second

问题 I tried something like this: var calendar = Calendar.current var dayFutureComponents = DateComponents() dayFutureComponents.day = 1 // aka 1 day var d = calendar.date(byAdding: dayFutureComponents, to: Date()) ...//setting of d.hour, d.minute, d.second to zero and finding the difference between 2 dates The problem is for example my current GMT is +3 . So the result differs from one I need to achieve by 3 hours. How to fix this issue? 回答1: First create a Calendar for the UTC timezone. Second

问题 I have the following function which i am using to calculate a start and end of todays date. It was working perfectly last week, i think it may have something to do with the clocks going forwards? func rangeOfPeriod(period: NSCalendarUnit, date: NSDate) -> (NSDate, NSDate) { let calendar = NSCalendar.currentCalendar() var startDate: NSDate? = nil var duration: NSTimeInterval = 0 calendar.rangeOfUnit(period, startDate: &startDate, interval: &duration, forDate: date) let endDate = startDate!

问题 In My application I have to complete a particular task in given time.So first i calculated the time complete the task in seconds and then add that time to the current that like this. NSDate *mydate = [NSDate date]; NSTimeInterval TotalDuraionInSec = sec.cal_time * 60; TaskCmpltTime = [mydate addTimeInterval:TotalDuraionInSec]; NSLog(@"task will be completed at%@",TaskCmpltTime); now I compare time like this if([CurrentTime isEqualToDate:AfterCmpltTime]){ NSLog (@"Time Finish"); } but I want

问题 I'm making an app in swift 2 where there is two timers. After 10 seconds I would like another timer to go faster. I have tried doing it like this but it didn't work (I'm trying to change the var time to 1): @IBOutlet var displayTimeLabel: UILabel! var startTimer = NSTimeInterval() var timer = NSTimer() var timer2:NSTimer = NSTimer() var time = 2.0 @IBAction func Start(sender: UIButton) { if !timer2.valid { timer2 = NSTimer.scheduledTimerWithTimeInterval(0.01, target: self, selector: