CODEWITHSUNDEEP
swiftstringdateswift3
SwiftDeveloper
SwiftDeveloper

Reputation: 7368

Get Date from week number in Swift 3

I have myYear and myWeek strings comes from apis , I want to convert them to date string like YYYY-mm-dd how can I do it in swift 3 ? my strings under below.

let myYear = "2017"
let myWeek = "8"

Upvotes: 2

Views: 2319

Answers (1)

David Pasztor
David Pasztor

Reputation: 54785

You just have to convert the strings into Ints, then generate a DateComponents object from them, get a Date from the DateComponents through a Calendar and finally use a DateFormatter to get the expected String representation of the date.

Bear in mind that the Date object will represent the first second of the week of that year and hence the String representation will correspond to the first day of that week.

let yearString = "2017"
let weekOfYearString = "8"

guard let year = Int(yearString), let weekOfYear = Int(weekOfYearString) else {return}
let components = DateComponents(weekOfYear: weekOfYear, yearForWeekOfYear: year)
guard let date = Calendar.current.date(from: components) else {return}

let df = DateFormatter()
df.dateFormat = "yyyy-MM-dd"
let outputDate = df.string(from: date)  //2017-02-19

Upvotes: 9

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