TIL: Customized iOS Full Page Screenshot

Feb 5, 2026

I stumbled upon this tweet and learned that you can create a customized “screenshot” on iOS using 𝚄𝙸𝚂𝚌𝚛𝚎𝚎𝚗𝚜𝚑𝚘𝚝𝚂𝚎𝚛𝚟𝚒𝚌𝚎𝙳𝚎𝚕𝚎𝚐𝚊𝚝𝚎.

screenshot of zats' tweet about customized iOS full page screenshot. — Just noticed a clever use of “full page” when taking screenshot of Apple maps - it doesn’t show more content like Safari showing entire page, but allows to share map only without any chrome. To support in your app look up UIScreenshotServiceDelegate

To be clear, I know about the full page screenshot feature but I didn’t know you can render anything you want.

I’m not a Swift developer but I’m slightly interested in learning more about native iOS development. So I decided to create a demo to replicate this with a vibe-coded mini app that shows a map and a bottom sheet. The full page screenshot shows a different view that includes an itinerary.

Screen	Full Page

The way it works is that you implement the UIScreenshotServiceDelegate protocol. iOS will call this method when it needs to generate a full page screenshot represented as a PDF.

@MainActor
final class ScreenshotServiceHandler: NSObject, ObservableObject, UIScreenshotServiceDelegate {
    // ...

    func screenshotService(
        _ screenshotService: UIScreenshotService,
        generatePDFRepresentationWithCompletion completionHandler: @escaping (Data?, Int, CGRect) -> Void
    ) {
        // Render the PDF representation here
        // ...

        completionHandler(pdfData, indexOfCurrentPage, visibleRect)
    }
}

Check out the full code here.