我知道获取UIWebView的截图并将其转换为PDF但我需要生成一个正确的pdf(文本作为文本而不是截图).Save2PDF是一个创建适当PDF的应用程序.有人知道他们是怎么做到的吗？

Note : UIWebView to PDF working for me.

Now UIView to PDF is also option but wanted to work with below code as same as used to create PDF in UIWebView.

I have done below code so far for UIView's viewPrintFormatter to be able create PDF:

Added Category of UIPrintPageRenderer for getting PDF Data

@interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
@end

@implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
  NSMutableData *pdfData = [NSMutableData data];
  UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
  [self prepareForDrawingPages: …

我在这里有这个代码,我把UIView放入PDF中.我遇到的问题是我的视图是一个详细视图控制器并且是可滚动的,而PDF只获取当时详细视图控制器内部的内容而不是完整视图,如果我在详细视图中移动,它将捕获任何内容部分我在,而不是完整的事情.我正在尝试做什么？

- (IBAction)Share:(id)sender {

    NSMutableData *pdfData = [NSMutableData data];

    // Points the pdf converter to the mutable data object and to the UIView to be converted
    UIGraphicsBeginPDFContextToData(pdfData, spreadSheet.bounds, nil);
    UIGraphicsBeginPDFPage();
    CGContextRef pdfContext = UIGraphicsGetCurrentContext();


    // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData

    [spreadSheet.layer renderInContext:pdfContext];

    // remove PDF rendering context
    UIGraphicsEndPDFContext();

    // Retrieves the document directories from the iOS device
    NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);

    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:@"test.pdf"];

    // …

我想从 UIScrollView 的内容创建一个 PDF 文件。

func createPdfFromView(aView: UIView, saveToDocumentsWithFileName fileName: String) {
    let pdfData = NSMutableData()
    let height = 1754.0
    let width = 1240.0
    UIGraphicsBeginPDFContextToData(pdfData, CGRect(x:-30, y:15,width:width,height:height) , nil)
    UIGraphicsBeginPDFPage()
    guard let pdfContext = UIGraphicsGetCurrentContext() else { return }

    aView.layer.render(in: pdfContext)
    UIGraphicsEndPDFContext()

    if let documentDirectories = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first {
        let documentsFileName = documentDirectories + "/" + fileName
        debugPrint(documentsFileName)
        pdfData.write(toFile: documentsFileName, atomically: true)
    }
}

我希望代码生成一个面向滚动视图中内容大小的 PDF。

该代码目前仅生成静态 PDF。如果滚动视图中的内容大于 PDF 页面，则内容被截断。

关于如何将UIView呈现为PDF上下文的SO有几个问题,但它们都使用view.layer.renderInContext(pdfContext),这会产生72 DPI图像(以及打印时看起来很糟糕的图像).我正在寻找的是一种技术,以某种方式让UIView渲染类似300 DPI的东西.

这个问题之前已经发布过(从iphone应用程序中的UIScrollView创建PDF),我正在使用的代码来自这里.

这是代码

-(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
{
    // Creates a mutable data object for updating with binary data, like a byte array
    NSMutableData *pdfData = [NSMutableData data];

    // Points the pdf converter to the mutable data object and to the UIView to be converted
    UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
    UIGraphicsBeginPDFPage();
    CGContextRef pdfContext = UIGraphicsGetCurrentContext();


    // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData

    [aView.layer renderInContext:pdfContext];

    // remove PDF rendering context
    UIGraphicsEndPDFContext();

    // Retrieves the document directories …