Hello I am trying to make a count down. I want to convert an integer from second to date and show in a label with this below formats. Lets say that 2.500.000 it prints out to label 29 days 22 hour
29 days 22 hour remained
15 hour 30 minutes remained
15 minutes remained
It sounds like you want a DateComponentsFormatter . That lets you generate strings that describe amounts of time rather than dates.
You could use the function func string(from ti: TimeInterval) -> String? which takes a time interval and converts it to a string describing an amount of time.
The following code, loosely based on the example code in Apple's documentation on DateComponentsFormatter:
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .full
formatter.includesApproximationPhrase = true
formatter.includesTimeRemainingPhrase = true
formatter.allowedUnits = [.day, .hour, .minute, .second]
print(formatter.string(from: 123456.7) ?? "nil")
Generates the string About 1 day, 10 hours, 17 minutes, 36 seconds remaining (At least with a US English locale.)
Related
I want to convert my variable for hours which is an integer into a 24 hour time system (for example, if it is 01:05:13 PM, hours will be saved as 13, minutes will be saved as 5, and seconds will be saved as 13) so that I can use it for some math later in my code to fid some differences on a scheduling app I am working on. This is my first app and I couldn't find an answer to this anywhere else so thanks for your help! Another way this code could work is getting the amount in seconds since the day has begun, if anyone knows how to do that, it would be greatly appreciated!
This is my function for getting the time and saving it as three different integers for hours, seconds, and minutes:
#IBAction func setTime() {
var date = NSDate()
//pickTimes()
var calendar = NSCalendar.current
calendar.timeZone = TimeZone(identifier: "UTC")!
var currentHour = calendar.component(.hour, from: date as Date) + 5
let currentMinutes = calendar.component(.minute, from: date as Date)
let currentSeconds = calendar.component(.second, from: date as Date)
timeText.text = ("\(currentHour):\(currentMinutes):\(currentSeconds)")
}
calendar.component(.hour, from: someDate) already gives you the time of day in 24 hour time so there's nothing else to do to solve your question.
Not sure why you are adding 5 to the hour. You set the timezone to UTC so the date will be treated as the UTC timezone. Then you add 5 to that result. That's kind of strange. If you just want the current hour in the user's locale timezone, don't change the calendar's timezone and don't add 5 to the hour.
Don't use NSDate or NSCalendar. This is Swift. Use Date and Calendar.
Updated code:
#IBAction func setTime() {
var date = Date()
//pickTimes()
var calendar = Calendar.current
var currentHour = calendar.component(.hour, from: date)
let currentMinutes = calendar.component(.minute, from: date)
let currentSeconds = calendar.component(.second, from: date)
timeText.text = ("\(currentHour):\(currentMinutes):\(currentSeconds)")
}
But it would be simpler to use a DateFormatter and set the timeStyle to .medium or maybe .long and format Date() into a string. This will give a properly localized time string.
Am currently using the format MM-dd-yyyy HH:mm to display the time stamp. Is it possible to drop the minutes if the time does not have any minute component ?
Like, instead of 3:00 PM is it possible to display only 3 PM ?
EDIT:
func formatDate(_ dateFormat: String, timeInterval: TimeInterval) -> String {
let date = Date(timeIntervalSince1970: timeInterval)
let formatter = DateFormatter()
formatter.dateFormat = dateFormat
return formatter.string(from: date)
}
let formattedDate = formatDate("MM-dd-yyyy HH:mm", timeInterval: 1520422200)
print(formattedDate)
Option 1
Replace any with zero minutes on return string.
return formatter.string(from: date).replacingOccurrences(of: ":00", with: "")
Option 2
Determine if there are minutes, and adjust date format.
if (Int(timeInterval) % 3600 == 0) {
let newFormat = dateFormat.replacingOccurrences(of: ":mm", with: "")
// ...
}
You could use DateComponents to determine what the .minute component is. If it's non-zero set the date format to include minutes, and otherwise set it to leave it out.
Note if this is for a user-facing string, use setLocalizedDateFormatFromTemplate and for hours use "j" so you can respect a user's setting for whether to display 24 hour time.
Note it is probably strange for most users to see 24 hour time without the minutes (e.g. "9pm" vs "21", the latter doesn't look right and probably would be better with ":00").
i am completely new in iPhone app development. i am trying to find difference between min_date and max_date in hours. and wants save its value in textfield. Kindly Provide me complete code to find out difference between both of dates. e.g. if min_date: 12/07/1989, 12:00 am and max_date: 13/07/1989,12:00 am , then total hours will be 24 hours. Please provide me code in swift 3.0.
First, use timeIntervalSince to get the difference in seconds:
let timeInterval = max_date.timeIntervalSince(min_date)
Then you can do some maths to calculate the number of hours
let hours = timeInterval / 60 / 60
You can choose to floor or ceiling this number, depending on your requirements.
let previousDate = ...
let now = Date()
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .full
formatter.allowedUnits = [.month, .day, .hour, .minute, .second]
formatter.maximumUnitCount = 2 // often, you don't care about seconds
if the elapsed time is in months, so you'll set max unit to whatever is
appropriate in your case
let string = formatter.string(from: previousDate, to: now)
let minDate = Date() // your min date
let maxDate = Date() // your max date
let components = Calendar.current.dateComponents([.hour], from: minDate, to: maxDate)
It's the most flexible method for search difference between two dates. You can use other components to search for months, days, years etc.
I have 2 TimeIntervals, which just represent date-agnostic times of day (e.g. 8:00 AM and 5:00 PM). So 0 represents exactly midnight, in this case, and 29,040 represents 8:04 AM. I want to check if the phone's time of day is between the two TimeIntervals.
I found a few similar Stack Overflow questions, but none of them really dealt with TimeIntervals. It seems like just using start <= Date().timeIntervalSinceReferenceDate <= end or something wouldn't work, because it would return a huge value.
What's the best way to handle this type of situation in Swift 3?
Edit: To clarify, I don't need to worry about things like daylight savings. As an example, assume that the user only wants certain things in the app to happen between the hours of X and Y, where X and Y are given to me as TimeInterval values since midnight. So it should be sufficient to check if the phone's TimeInterval since midnight on a typical day is between X and Y before completing the action.
Date().timeIntervalSinceReferenceDate returns the number of seconds since Jan 1, 2000 so no doubt it's a huge number.
It's inadvisable to store time as seconds since midnight due to this naggy little thing called Daylight Saving Time. Every year, different countries do it on different days and on different hours. For example, even though Britain and France change their clock on the same day (March 26, 2017), one makes the shift from 1AM to 2AM, the other goes from 2AM to 3AM. That's very easy to make for a mess!
Use DateComponents instead:
let calendar = Calendar.current
let startTimeComponent = DateComponents(calendar: calendar, hour: 8)
let endTimeComponent = DateComponents(calendar: calendar, hour: 17, minute: 30)
let now = Date()
let startOfToday = calendar.startOfDay(for: now)
let startTime = calendar.date(byAdding: startTimeComponent, to: startOfToday)!
let endTime = calendar.date(byAdding: endTimeComponent, to: startOfToday)!
if startTime <= now && now <= endTime {
print("between 8 AM and 5:30 PM")
} else {
print("not between 8 AM and 5:30 PM")
}
I ended up using DateComponents to calculate a TimeInterval.
let components = Calendar.current.dateComponents(
[.hour, .minute, .second], from: Date())
guard let seconds = components.second,
let minutes = components.minute,
let hours = components.hour else
{
return false
}
let currentTime = Double(seconds + minutes * 60 + hours * 60 * 60)
return startTime <= currentTime && currentTime <= endTime
I have two times in the format HH:MM how would I compare the second from the first one finding how many minutes left until I reach to the first time:
example:
timeOne = 12:01
timeTwo = 11:32
output = 29 minutes
Any help writing this in Swift?
NSCalendar can diff dates easily (assuming start and end are NSDate instances
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.Minute, fromDate: start, toDate: end, options: [])
components.minute
If you are interested in getting just the formatted string, and not the actual value, then checkout NSDateComponentsFormatter:
let formatter = NSDateComponentsFormatter()
formatter.allowedUnits = .Minute
formatter.unitsStyle = .SpellOut
// includesTimeRemainingPhrase gives strings like "T minutes remaining"
formatter.stringFromDate(start, toDate: end)
By changing the unitsStyle, you could get different representations, such as:
"54m"
"54 minutes"
"54 min"
"fifty-four minutes"
You should operate with 2 NSDate instances, then you may use next API:
let interval = laterDate.timeIntervalSinceDate(earlierDate)
It returns the number of seconds, as an NSTimeInterval value.
Divide it by 60 will give you minutes.