Swift 3 打印功能

1. 加载到webview再打印

2. 直接打印nsdata

func printViaWebView(filename: String)
{
 let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory,.userDomainMask,truE)[0]
        let filePath = "\(documentsPath)/\(fileName)"
        let url = NSURL(fileURLWithPath: filePath)
        let urlrequest = NSURLrequest(url: url as URL)
        
        webView.loadrequest(urlrequest as URLrequest)
        
        
        let pic = UIPrinTinteractionController.shared
        let prinTinfo : UIPrinTinfo = UIPrinTinfo(Dictionary: nil)
        
        prinTinfo.outputType = UIPrinTinfoOutputType.general
        prinTinfo.jobName = url.absoluteString!
        
        pic.prinTinfo = prinTinfo
        pic.printFormatter = webView.viewPrintFormatter()
        pic.showsPageRange = false
        
        pic.present(animated: true,completionHandler: nil)
}

func printViaNSData(filename: String){
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory,truE)[0]
        let filePath = "\(documentsPath)/\(fileName)"
        let url = NSURL(fileURLWithPath: filePath)
        let urlrequest = NSURLrequest(url: url as URL)
        
        webView.loadrequest(urlrequest as URLrequest)
        
        
        let pic = UIPrinTinteractionController.shared
        let prinTinfo : UIPrinTinfo = UIPrinTinfo(Dictionary: nil)
        
        prinTinfo.outputType = UIPrinTinfoOutputType.general
        //prinTinfo.jobName = url.absoluteString!
        //prinTinfo.orientation = .porTrait
        
        pic.prinTingItem = NSData(contentsOfFile: filePath)
        pic.showsPaperSELEctionForLoadedPapers = true;
        pic.showsPageRange = true;
        pic.showsnumberOfCopies = true;
        pic.prinTinfo = prinTinfo
        //pic.printFormatter = webView.viewPrintFormatter()
        
        pic.present(animated: true,completionHandler: nil)
}