Get user input from Swift 3 command line tool

Question

When building a command line tool in Swift 3, I need to prompt the user for keyboard input. How would I go about asking a user for their input (e.g the users name)?

In particular this answer: http://stackoverflow.com/a/34144018/1187415. — Martin R, Jun 16 '16 at 12:32

score 6 · Answer 1 · answered Jun 16 '16 at 12:19

6

readline() is available since at least Swift 2 and is still available in Swift 3 (Xcode 8 Beta 1):

print("Please enter your name: ", terminator: "")
let name = readLine()!

answered Jun 16 '16 at 12:19

Code Different

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score 1 · Answer 2 · answered Jun 16 '16 at 12:09

1

This is subject to change as Swift 3 is a moving target, but here is a basic example to prompt a user for their input.

import Foundation

func input() -> String {
    let keyboard = FileHandle.standardInput()
    let inputData = keyboard.availableData

    return NSString(data: inputData, encoding: String.Encoding.utf8.rawValue) as! String
}

print("Please enter your name:")

var name = input()

print("\(name)")

answered Jun 16 '16 at 12:09

Jason M.

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Note that with your solution, `name` will contain a trailing newline character. – Martin R Jun 16 '16 at 12:25
Thanks for the heads up Martin – Jason M. Jun 16 '16 at 12:30

Get user input from Swift 3 command line tool

2 Answers2