Get the current device orientation - ios

Question

I know that this question was asked before and tried to implement the suggested solution, but it doesn't work for me. Perhaps I am doing smth wrong. Do you have any idea?
Here is my code:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var test: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
test.backgroundColor = UIColor.darkGray
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated) // No need for semicolon
func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
if UIDevice.current.orientation.isLandscape {
test.backgroundColor = UIColor.purple
} else {
test.backgroundColor = UIColor.blue
}
}
}
}

Answer 1

You have nested functions - that won't work. Change it to this:
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated) // No need for semicolon
}
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
if UIDevice.current.orientation.isLandscape {
test.backgroundColor = UIColor.purple
} else {
test.backgroundColor = UIColor.blue
}
}
In fact, you can get rid of the override for viewWillLayoutSubviews with the code you've shown.

Answer 2

** to those that need additional help see recommendations below
** this function will be called before the change in size and but you will know it from the arguments
Swift 3.x +
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
if UIDevice.current.orientation.isLandscape {
//Landscape
print("before transition")
print("w "+"\(width)")
print("h "+"\(height)")
print("to size")
print("w "+"\(size.width)")
print("h "+"\(size.height)")
} else {
//Portrait
print("before transition")
print("w "+"\(width)")
print("h "+"\(height)")
print("to size")
print("w "+"\(size.width)")
print("h "+"\(size.height)")
}
}