I am trying to get the dynamic input from user in playground for iOS but it's not working. I tried the following code but it didn't work.
import Foundation
import UIKit
func input() -> String {
var keyboard = FileHandle.standardInput
var inputData = keyboard.availableData
var strData = NSString(data: inputData, encoding: String.Encoding.utf8.rawValue)!
return strData.trimmingCharacters(in: NSCharacterSet.newlines)
}
input()
Getting input from playground is not doable, You can do it in an XCode project using:
print("Please enter your name")
var name = readLine()
print("name: \(name!)")
Or:
func input() -> String {
let keyboard = FileHandle.standardInput
let inputData = keyboard.availableData
return String(data: inputData, encoding: .utf8)!
}
print("Please enter your name")
var name = input()
print("name: \(name!)")
You can get your playground input from a textField as follows:
import PlaygroundSupport
import UIKit
class V: UIViewController {
var textField = UITextField(frame: CGRect(x: 20, y: 20, width: 200, height: 24))
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(textField)
textField.backgroundColor = .white
textField.delegate = self
}
}
extension V: UITextFieldDelegate {
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
// Do stuff here
return true
}
}
let v = V()
v.view.frame = CGRect(x: 0, y: 0, width: 300, height: 300)
PlaygroundPage.current.liveView = v.view
PlaygroundPage.current.needsIndefiniteExecution = true
Is it possible to read keyboard input in a playground?
NO.
To experiment keyboard input features like readLine(), create an macOS > Command Line Tool project and run it in Xcode, You will be able to write in the Xcode console.
Is it possible to “Answer” project in the same section as an empty playground. You can use “ask()” and “show()” methods.
For example:
func square(num: Double) -> Double {
return num * num
}
show("Please type a number to square it:")
var sqrt = askForNumber()
show("Result: \(square(num: Double(sqrt)))")
Sorry, I’m writing on iPad and it’s difficult to input code.
