SwiftUI Printing a View

I am attempting to print a view from swiftui to a printer. Everything seems to work fine except when the print dialog appears the preview is an empty view. My PrintView has a large black box with text in it just for testing but will not appear in print preview.

func fPrint() {
    let printingView = UIHostingController(rootView: PrintView()).view

    // GET VIEW AS NSDATA FOR PDF
    let pdfData:NSMutableData = NSMutableData()
    let pageSize:CGRect = CGRect()
    UIGraphicsBeginPDFContextToData(pdfData, pageSize, nil)
    let pdfContext:CGContext = UIGraphicsGetCurrentContext()!

    // CREATE A SINGLE PAGE PDF
    UIGraphicsBeginPDFPage()
    printingView?.layer.render(in: pdfContext)
    UIGraphicsEndPDFContext();

    // SETUP PRINT INFO
    let printInfo = UIPrintInfo(dictionary:nil)
    printInfo.outputType = UIPrintInfo.OutputType.general
    printInfo.jobName = "Print Job"
    printInfo.orientation = .portrait

    // SETUP PRINT CONTROLLER
    let printController = UIPrintInteractionController.shared
    printController.printInfo = printInfo
    printController.showsNumberOfCopies = true
    printController.showsPaperSelectionForLoadedPapers = true
    printController.printingItem = pdfData
    printController.present(animated: true, completionHandler: nil)
}