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iOS Swift converting calendar component int month to medium style string month

Posted by: admin November 30, 2017 Leave a comment

Questions:

I want to display calendar in this format

visible calendar style date

to the user. One option is to use “string range” to get the individual calendar components. The second one is to get it using NSCalendar which to me looks like the better one (is it?). So my code is as below. But there are two problems.

  1. I am not getting the local time form “hour & minute components”
  2. I am getting month in Int. I want it to be in String (month in mediumStyle)

Anyone know how to get what I need? Image attached is what exactly I want to achieve. There I am using three UILabel one for “date”, second for “month, year” and third for “time”.

Any help would be appreciated.

var inputDateString = "Jun/12/2015 02:05 Am +05:00"

override func viewDidLoad() {
    super.viewDidLoad()
    let newDate = dateformatterDateString(inputDateString)
    let calendar = NSCalendar.currentCalendar()
    let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute | .CalendarUnitMonth | .CalendarUnitYear | .CalendarUnitDay, fromDate: newDate!)

    let hour = components.hour
    let minutes = components.minute
    let month = components.month
    let year = components.year
    let day = components.day

    println(newDate)
    println(components)
    println(day)     // 12
    println(month)   // 6 -----> Want to have "Jun" here
    println(year)    // 2015
    println(hour)    // 2 ------> Want to have the hour in the inputString i.e. 02
    println(minutes) // 35 ------> Want to have the minute in the inputString i.e.  05
}

func dateformatterDateString(dateString: String) -> NSDate? {
    let dateFormatter: NSDateFormatter = NSDateFormatter()
    dateFormatter.dateFormat = "MMM/dd/yyyy hh:mm a Z"
    //      dateFormatter.timeZone = NSTimeZone(abbreviation: "UTC")
    dateFormatter.timeZone = NSTimeZone.localTimeZone()
    return dateFormatter.dateFromString(dateString)
}
Answers:

You can use DateFormatter as follow:

extension Formatter {
    static let monthMedium: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "LLL"
        return formatter
    }()
    static let hour12: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "h"
        return formatter
    }()
    static let minute0x: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "mm"
        return formatter
    }()
    static let amPM: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "a"
        return formatter
    }()
}
extension Date {
    var monthMedium: String  { return Formatter.monthMedium.string(from: self) }
    var hour12:  String      { return Formatter.hour12.string(from: self) }
    var minute0x: String     { return Formatter.minute0x.string(from: self) }
    var amPM: String         { return Formatter.amPM.string(from: self) }
}

let date = Date()

let dateMonth  = date.monthMedium  // "May"
let dateHour   = date.hour12       // "1"
let dateMinute = date.minute0x     // "18"
let dateAmPm = date.amPM           // "PM"

Questions:
Answers:

NSDateFormatter has monthSymbols, shortMonthSymbols and veryShortSymbols properties.

So try this:

let dateFormatter: NSDateFormatter = NSDateFormatter()

let months = dateFormatter.shortMonthSymbols
let monthSymbol = months[month-1] as! String // month - from your date components

println(monthSymbol)

Questions:
Answers:
I am adding three types. Have a look.

        //Todays Date
        let todayDate = NSDate()
        let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)!
        let components = calendar.components(.CalendarUnitYear | .CalendarUnitMonth | .CalendarUnitDay, fromDate: todayDate)
        var (year, month, date) = (components.year, components.month, components.day)
        println("YEAR: \(year)  MONTH: \(month) DATE: \(date)")

        //Making a X mas Yr
        let morningOfChristmasComponents = NSDateComponents()
        morningOfChristmasComponents.year = 2014
        morningOfChristmasComponents.month = 12
        morningOfChristmasComponents.day = 25
        morningOfChristmasComponents.hour = 7
        morningOfChristmasComponents.minute = 0
        morningOfChristmasComponents.second = 0

        let morningOfChristmas = NSCalendar.currentCalendar().dateFromComponents(morningOfChristmasComponents)!
        let formatter = NSDateFormatter()
        formatter.dateStyle = NSDateFormatterStyle.LongStyle
        formatter.timeStyle = .MediumStyle
        let dateString = formatter.stringFromDate(morningOfChristmas)
        print("dateString : \(dateString)")


        //Current month - complete name
        let dateFormatter: NSDateFormatter = NSDateFormatter()
        let months = dateFormatter.monthSymbols
        let monthSymbol = months[month-1] as! String
        println("monthSymbol  : \(monthSymbol)")


Print Results:

YEAR: 2015  MONTH: 10 DATE: 9
dateString : December 25, 2014 at 7:00:00 AM
monthSymbol  : October