使用Swift在iOS中打印视图

我正在开发一个应用程序,需要通过AirPrint直接从iPad生成和打印访问者通行证.

我到处寻找如何打印视图,但我只能找到如何打印文本,webKit和mapKit.

有没有办法打印整个视图？如果没有,打印访客通行证将是一个很好的解决方案,它将是纯文本,方框和照片.谢谢.

我通过修改这里找到的代码找到了我的问题的答案:UIView的AirPrint内容

//create an extension to covert the view to an image
extension UIView {
 func toImage() -> UIImage {
    UIGraphicsBeginImageContextWithOptions(bounds.size, false, UIScreen.mainScreen().scale)

    drawViewHierarchyInRect(self.bounds, afterScreenUpdates: true)

    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return image
 }
}

//In your view controller    
@IBAction func printButton(sender: AnyObject) {

    let printInfo = UIPrintInfo(dictionary:nil)
    printInfo.outputType = UIPrintInfoOutputType.General
    printInfo.jobName = "My Print Job"

    // Set up print controller
    let printController = UIPrintInteractionController.sharedPrintController()
    printController.printInfo = printInfo

    // Assign a UIImage version of my UIView as a printing iten
    printController.printingItem = self.view.toImage()

    // If you want to specify a printer
    guard let printerURL = URL(string: "Your printer URL here, e.g. ipps://HPDC4A3E0DE24A.local.:443/ipp/print") else { return }
    guard let currentPrinter = UIPrinter(url: printerURL) else { return }                     

    printController.print(to: currentPrinter, completionHandler: nil)

    // Do it
    printController.presentFromRect(self.view.frame, inView: self.view, animated: true, completionHandler: nil)
}