I am attempting to create a countdown between two days. For example an object was created on 05-12-2022 ( "dd/MM/yyyy" format)

I want this to live up until 12-12-2022 (a week later). How would you recommend I go about grabbing the number of days between each and starting a countdown of sorts (ie. 3 days left, 2 days left, etc).

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This is how I'm grabbing the two dates currently, just don't know how to subtract them.

func removeEntryDate() -> String{
        let nowDate = Date()
        let endDate = Calendar.current.date(byAdding: .day, value:  7, to: Date())
        var dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd/MM/yyyy"
       //return when we should delete past journal entry
        var dateString = dateFormatter.string(from: endDate! as Date)
        print(dateString)
        return dateString
    }

    func currentDate() -> String {
        let date = NSDate()
        var dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd/MM/yyyy"
        var dateString = dateFormatter.string(from: date as Date)
       //return when we should delete past journal entry
        return dateString
    }