get first day of this week in swift

You can get the first day of the week in Swift by using the Calendar and DateComponents classes. Here's an example:

main.swift
let calendar = Calendar.current
let today = Date()
let components = calendar.dateComponents([.yearForWeekOfYear, .weekOfYear], from: today)
let startOfWeek = calendar.date(from: components)!
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In this code, we first get the current calendar using the Calendar.current static property. Then we get the current date using the Date() initializer. We then use dateComponents(_:from:) to get the year for the week of the year and the week of the year components for the current date.

Finally, we use calendar.date(from:) to get the start of the week by combining the year for the week of the year and week of the year components with the time components set to midnight.