IPad Playground Has Different View.Frame - swift

Question

I am trying to show this simple ViewController in iPad Playgrounds with this code:
import UIKit
import PlaygroundSupport
class MyViewController : UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
setupViews()
}
func setupViews() {
let view1 = UIView(frame: CGRect(x: 0, y: 0, width: view.frame.width/2, height: 100))
view1.backgroundColor = .red
view.addSubview(view1)
}
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()
You can see that, even though it says view.frame.width/2 for the frame of View1, the view still looks like this:
What is wrong? Thank you.

Answer 1

This is the solution I used which got it to work. In Swift Playgrounds, the layout is created in the viewDidLayoutSubview method so all frames should be created there.

Answer 2

You can set your preferred size after you init your ViewController:
import UIKit
import PlaygroundSupport
class VC: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
setupViews()
}
func setupViews() {
let view1 = UIView(frame: CGRect(x: 0, y: 0, width: view.frame.width/2, height: 100))
view1.backgroundColor = .red
view.addSubview(view1)
}
}
let vc = VC()
vc.preferredContentSize = CGSize(width: 768, height: 1024)
PlaygroundPage.current.liveView = vc
Playground with preferredContentSize
Playground without preferredContentSize