Does swift playground support UIKit?
-
21-12-2019 - |
Question
I tried to create a UILabel
in playground but failed. Does playground only support OS X development for now?
La solution
YES, it does!
File: New > File... > iOS > Source > Playground
import UIKit
let lbl = UILabel(frame: CGRectMake(0, 0, 300, 100))
lbl.text = "Hello StackOverflow!"
Then, save the file. This will trigger the Playground to interpret UI related things. Sometimes you may need to toss in a trailing newline and save again -- its a beta. At this point, the word "UILabel" should appear on the right-hand side.
Now, to actually view what you've done, you've got to click on the "Quick View" eye on the right, or the white circle to open it in Assistant Editor:
Here's a screenshot of some basic things with UIImage working, etc.
Autres conseils
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:
- View -> Utilities -> Show File Inspector (opt + cmd + 1)
- 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
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!"
}
In Xcode 8 XCPlaygroundPage.currentPage.liveView
is deprecated. Instead, use
import PlaygroundSupport
PlaygroundPage.current.liveView = view
Press CMD+Option+1 and change the platform to iOS, this will allow you to import UIKit.
I found I could add a new playground file in IOS project, and in that file I can import UIKit.
please use Command (⌘) + Option(⌥) + 1
combination to switch to iOS platform from OSX in playground to use UIKit .
Press Option+Cmd+1 and choose iOS in the Platform setting. Then you can import UIKit and play~
Yeah looks like it doesn't support UIkit yet.
Edit: Actually above answer is incorrect.
You can create iOS project and add new .playground file inside that project. Then you can import Uikit or another iOS specific framework.