Convert String minutes seconds to Int

Question

I've a string with minutes and seconds in format "minutes:seconds". For example, "5:36". I want to convert it to Int value. For example "5:36" string should be 336 Int value. How this can be done?

Answer 1

Here's a simple extension you can use which will validate the format of your input string too:

import Foundation

extension String {

    func toSeconds() -> Int? {

        let elements = components(separatedBy: ":")

        guard elements.count == 2 else {
            print("Provided string doesn't have two sides separated by a ':'")
            return nil
        }

        guard let minutes = Int(elements[0]),
        let seconds = Int(elements[1]) else {
           print("Either the minute value or the seconds value cannot be converted to an Int")
            return nil
        }

        return (minutes*60) + seconds

    }

}

Usage:

let testString1 = "5:36"
let testString2 = "35:36"

print(testString1.toSeconds()) // prints: "Optional(336)"
print(testString2.toSeconds()) // prints: "Optional(2136)"