How do I mark an IBOutlet as available for a specific iOS version

Question

I am using the PDFKit native framework which is available for iOS 11 only and my project targets older iOS versions. Xcode asked me to mark the whole UIViewController class as @available(iOS 11.0, *)

I'd like to handle viewing the PDF on older iOS versions in the same UIViewController using a different UIView that's going to use a UIWebView or a 3rd party library. How can I achieve that?

Answer 1

You can set this condition for version specific execution on same view controller.

if #available(iOS 11.0, *) {

    let pdfView = PDFView(frame: UIScreen.main.bounds)
    let url = Bundle.main.url(forResource: "How", withExtension: "pdf")
    pdfView.document = PDFDocument(url: url!)
    self.view.addSubview(pdfView)

} else {
        // Fallback on earlier versions
}