Swift - How to detect orientation changes

Question

I want to add two images to single image view (i.e for landscape one image and for portrait another image)but i don\'t know how to detect orientation changes using swift lan

Answer 1

Swift 4.2, RxSwift

If we need to reload collectionView.

NotificationCenter.default.rx.notification(UIDevice.orientationDidChangeNotification)
    .observeOn(MainScheduler.instance)
    .map { _ in }            
    .bind(to: collectionView.rx.reloadData)
    .disposed(by: bag)

Swift 4, RxSwift

If we need to reload collectionView.

NotificationCenter.default.rx.notification(NSNotification.Name.UIDeviceOrientationDidChange)
    .observeOn(MainScheduler.instance)
    .map { _ in }            
    .bind(to: collectionView.rx.reloadData)
    .disposed(by: bag)