Does swift playground support UIKit?

Question

I tried to create a UILabel in playground but failed. Does playground only support OS X development for now?

Answer 1

please use Command (⌘) + Option(⌥) + 1 combination to switch to iOS platform from OSX in playground to use UIKit .

Answer 2

Most simple solution: Xcode 9.2

• Start with a new Single View playground:

• show Assistance Editor: View -> Assistance Editor -> Show Assistance Editor.

• here you go. By default you will see printed property: label.text = "Hello World!" in the Live View window

Answer 3

In Xcode 7, now you can't use the Quick Look to see the appearance of a UIView.

Instead, use the Assistant Editor and:

XCPlaygroundPage.currentPage.liveView = sampleView

Like this:

import XCPlayground
import UIKit

XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

// Simulate User Interaction, not available in Xcode 7.2
func delay(delay:Double, closure:()->()) {
    dispatch_after(
        dispatch_time(
            DISPATCH_TIME_NOW,
            Int64(delay * Double(NSEC_PER_SEC))
        ),
        dispatch_get_main_queue(), closure)
}

let color = UIColor(red: 1, green: 1, blue: 0, alpha: 1)
let leftMargin = 20
let view = UIView(frame: CGRect(x: 0, y: 0, width: 375, height: 667)) // iPhone 6 proportions
view.backgroundColor = UIColor.grayColor()

// LABEL
let label = UILabel(frame: CGRect(x: leftMargin, y: 5, width: 300, height: 44))
label.text = "Hello, playground"
label.textColor = UIColor.whiteColor()
view.addSubview(label)

// TEXTFIELD
let textField = UITextField(frame: CGRect(x: leftMargin, y: 60, width: 300, height: 44))
textField.placeholder = "Edit me…"
textField.backgroundColor = UIColor(white: 1, alpha: 0.5)
textField.textColor = UIColor.whiteColor()
textField.userInteractionEnabled = true
view.addSubview(textField)

XCPlaygroundPage.currentPage.liveView = view

delay(1.0) { () -> () in
    textField.text = "New text!"
}

Answer 4

Edited@2014-11-13: It seems the new xcode 6 had fixed this.

NO, It doesn't. But it's worth noting that you can import UIKit.

If you want to import UIKit you cound follow this:

1. View -> Utilities -> Show File Inspector (opt + cmd + 1)
2. On the right side of Xcode Change “Playground Settings -> Platform” from OS X to iOS

then you could import UIKit or some module for iOS

ps. I try to create a UIImageView but it doesn't show the correct image on the right side. It seem worthless to import UIKit