public override void DidFinishNavigation(WKWebView webView, WKNavigation navigation)
{
try
{
int padding = 10;
UIEdgeInsets pageMargins = new UIEdgeInsets(padding, padding, padding, padding);
webView.ViewPrintFormatter.ContentInsets = pageMargins;
UIPrintPageRenderer renderer = new UIPrintPageRenderer();
renderer.AddPrintFormatter(webView.ViewPrintFormatter, 0);
CGSize pageSize = new CGSize(PDFToHtml.PageWidth, PDFToHtml.PageHeight);
CGRect printableRect = new CGRect(padding, padding, pageSize.Width - (padding * 2), pageSize.Height - (padding * 2));
CGRect paperRect = new CGRect(0, 0, PDFToHtml.PageWidth, PDFToHtml.PageHeight);
var nSString = new NSString("PaperRect");
var printableRectstring = new NSString("PrintableRect");
renderer.SetValueForKey(NSValue.FromObject(paperRect), nSString);
renderer.SetValueForKey(NSValue.FromObject(printableRect), printableRectstring);
NSData file = PrintToPDFWithRenderer(renderer, paperRect);
File.WriteAllBytes(PDFToHtml.FilePath + ".pdf", file.ToArray());
PDFToHtml.Status = PDFEnum.Completed;
}
catch
{
PDFToHtml.Status = PDFEnum.Failed;
}
}
public override void LoadingFinished(UIWebView webView)
{
double height, width;
int header, sidespace;
width = 595.2;
height = 841.8;
header = 10;
sidespace = 10;
UIEdgeInsets pageMargins = new UIEdgeInsets(header, sidespace, header, sidespace);
webView.ViewPrintFormatter.ContentInsets = pageMargins;
UIPrintPageRenderer renderer = new UIPrintPageRenderer();
renderer.AddPrintFormatter(webView.ViewPrintFormatter, 0);
CGSize pageSize = new CGSize(width, height);
CGRect printableRect = new CGRect(sidespace,
header,
pageSize.Width - (sidespace * 2),
pageSize.Height - (header * 2));
CGRect paperRect = new CGRect(0, 0, width, height);
renderer.SetValueForKey(NSValue.FromObject(paperRect), (NSString)"paperRect");
renderer.SetValueForKey(NSValue.FromObject(printableRect), (NSString)"printableRect");
NSData file = PrintToPDFWithRenderer(renderer, paperRect);
File.WriteAllBytes(filename, file.ToArray());
OnPageLoadFinished?.Invoke(this, new EventArgs());
}
private NSData CreatePdfFile(UIViewPrintFormatter printFormatter)
{
var renderer = new UIPrintPageRenderer();
renderer.AddPrintFormatter(printFormatter, 0);
var point = new CoreGraphics.CGPoint(0, 0);
var paperSize = new CoreGraphics.CGSize(this.Frame.Size.Width, this.Frame.Size.Height);
var printableRect = new CoreGraphics.CGRect(point, new CoreGraphics.CGSize(paperSize.Width, paperSize.Height));
var paperRect = new CoreGraphics.CGRect(point, new CoreGraphics.CGSize(paperSize.Width, paperSize.Height));
renderer.SetValueForKey(NSValue.FromCGRect(paperRect), new NSString("paperRect"));
renderer.SetValueForKey(NSValue.FromCGRect(printableRect), new NSString("printableRect"));
return(renderer.PrintToPDF(paperRect));
}
public static NSData PrintToPDF(this UIPrintPageRenderer renderer, CGRect paperRect)
{
var pdfData = new NSMutableData();
UIGraphics.BeginPDFContext(pdfData, paperRect, null);
var range = new NSRange(0, renderer.NumberOfPages);
renderer.PrepareForDrawingPages(range);
var bounds = UIGraphics.PDFContextBounds;
for (int x = 0; x < renderer.NumberOfPages; x++)
{
UIGraphics.BeginPDFPage();
renderer.DrawPage(x, bounds);
}
UIGraphics.EndPDFContent();
return(pdfData);
}
private NSData PrintToPDFWithRenderer(UIPrintPageRenderer renderer, CGRect paperRect)
{
NSMutableData pdfData = new NSMutableData();
UIGraphics.BeginPDFContext(pdfData, paperRect, null);
renderer.PrepareForDrawingPages(new NSRange(0, renderer.NumberOfPages));
_ = UIGraphics.PDFContextBounds;
for (int i = 0; i < renderer.NumberOfPages; i++)
{
UIGraphics.BeginPDFPage();
renderer.DrawPage(i, paperRect);
}
UIGraphics.EndPDFContent();
return(pdfData);
}
private void _loadFinished(object sender, EventArgs e)
{
var webview = sender as UIWebView;
UIPrintInteractionController controller = UIPrintInteractionController.SharedPrintController;
if (null == controller)
{
return;
}
// 设置打印机的一些默认信息
UIPrintInfo printInfo = UIPrintInfo.PrintInfo;
// 输出类型
printInfo.OutputType = UIPrintInfoOutputType.General;
// 打印队列名称
printInfo.JobName = "HtmlDemo";
// 是否单双面打印
printInfo.Duplex = UIPrintInfoDuplex.LongEdge;
// 设置默认打印信息
controller.PrintInfo = printInfo;
// 显示页码范围
controller.ShowsPageRange = true;
// 预览设置
UIPrintPageRenderer myRenderer = new UIPrintPageRenderer();
// To draw the content of each page, a UIViewPrintFormatter is used.
// 生成html格式
UIViewPrintFormatter viewFormatter = webview.ViewPrintFormatter;
myRenderer.AddPrintFormatter(viewFormatter, 0);
// 渲染html
controller.PrintPageRenderer = myRenderer;
controller.Present(true, (handler, completed, err) =>
{
if (!completed && err != null)
{
System.Diagnostics.Debug.WriteLine("Printer Error");
}
});
}
private NSData PrintToPDFWithRenderer(UIPrintPageRenderer renderer, CGRect paperRect)
{
NSMutableData pdfData = new NSMutableData();
try
{
UIGraphics.BeginPDFContext(pdfData, paperRect, null);
renderer.PrepareForDrawingPages(new NSRange(0, renderer.NumberOfPages));
for (int i = 0; i < renderer.NumberOfPages; i++)
{
UIGraphics.BeginPDFPage();
renderer.DrawPage(i, paperRect);
}
UIGraphics.EndPDFContent();
}
catch
{
PDFToHtml.Status = PDFEnum.Failed;
}
return(pdfData);
}
