iOS에서 UIView를 PDF로 변환하는 방법은 무엇입니까?

앱에서 PDF를 표시하는 방법에 대한 많은 리소스가 UIView있습니다. 내가 지금 작업하고있는 것은에서 PDF를 만드는 것입니다 UIViews.

예를 들어, 나는이 UIViewTextviews 같은 파단으로,, UILabels, UIImages, 그래서 어떻게 변환 할 수있는 큰를 UIView PDF 파일에 모든 서브 뷰와 subsubviews을 포함한 전체?

내가 체크 한 애플의 아이폰 OS 참조 . 그러나 PDF 파일에 텍스트 / 이미지 조각을 쓰는 것에 대해서만 이야기합니다.

내가 직면 한 문제는 PDF로 파일에 쓰고 싶은 내용이 많다는 것입니다. 한 장씩 PDF로 작성하면 엄청난 작업이 될 것입니다. 이것이 제가 UIViewsPDF 또는 비트 맵 에 쓰는 방법을 찾고있는 이유 입니다.

Stack Overflow 내의 다른 Q / A에서 복사 한 소스 코드를 사용해 보았습니다. 그러나 UIView경계 크기가 있는 빈 PDF 만 제공 됩니다.

-(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();

    // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
    [aView drawRect:aView.bounds];

    // 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:aFilename];

    // instructs the mutable data object to write its context to a file on disk
    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
    NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
}

다음 메서드 는 뷰 의 비트 맵 만 생성 합니다. 실제 타이포그래피를 만들지는 않습니다.

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

    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];

    // instructs the mutable data object to write its context to a file on disk
    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
    NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
}

또한 다음을 가져와야합니다. QuartzCore / QuartzCore.h

또한 관심이 있다면 Swift 3 코드가 있습니다.

func createPdfFromView(aView: UIView, saveToDocumentsWithFileName fileName: String)
{
    let pdfData = NSMutableData()
    UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, 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)
    }
}

누군가 관심이 있다면 Swift 2.1 코드가 있습니다.

    func createPdfFromView(aView: UIView, saveToDocumentsWithFileName fileName: String)
    {
        let pdfData = NSMutableData()
        UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil)
        UIGraphicsBeginPDFPage()

        guard let pdfContext = UIGraphicsGetCurrentContext() else { return }

        aView.layer.renderInContext(pdfContext)
        UIGraphicsEndPDFContext()

        if let documentDirectories = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first {
            let documentsFileName = documentDirectories + "/" + fileName
            debugPrint(documentsFileName)
            pdfData.writeToFile(documentsFileName, atomically: true)
        }
    }

UIView에서 PDF를 만드는 아주 쉬운 방법은 UIView Extension을 사용하는 것입니다.

스위프트 4.2

extension UIView {

  // Export pdf from Save pdf in drectory and return pdf file path
  func exportAsPdfFromView() -> String {

      let pdfPageFrame = self.bounds
      let pdfData = NSMutableData()
      UIGraphicsBeginPDFContextToData(pdfData, pdfPageFrame, nil)
      UIGraphicsBeginPDFPageWithInfo(pdfPageFrame, nil)
      guard let pdfContext = UIGraphicsGetCurrentContext() else { return "" }
      self.layer.render(in: pdfContext)
      UIGraphicsEndPDFContext()
      return self.saveViewPdf(data: pdfData)

  }

  // Save pdf file in document directory
  func saveViewPdf(data: NSMutableData) -> String {  
    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
    let docDirectoryPath = paths[0]
    let pdfPath = docDirectoryPath.appendingPathComponent("viewPdf.pdf")
    if data.write(to: pdfPath, atomically: true) {
        return pdfPath.path
    } else {
        return ""
    }
  }
}

크레딧 : http://www.swiftdevcenter.com/create-pdf-from-uiview-wkwebview-and-uitableview/

스위프트 5 / 아이폰 OS (12), 당신은 결합 할 수 CALayer의 render(in:)과 방법을 UIGraphicsPDFRenderer의 ' writePDF(to:withActions:)a에서 PDF 파일 생성하기 위해 방법 UIView인스턴스를.

다음 Playground 샘플 코드는 render(in:)및 사용 방법을 보여줍니다 writePDF(to:withActions:).

import UIKit
import PlaygroundSupport

let view = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
view.backgroundColor = .orange
let subView = UIView(frame: CGRect(x: 20, y: 20, width: 40, height: 60))
subView.backgroundColor = .magenta
view.addSubview(subView)

let outputFileURL = PlaygroundSupport.playgroundSharedDataDirectory.appendingPathComponent("MyPDF.pdf")
let pdfRenderer = UIGraphicsPDFRenderer(bounds: view.bounds)

do {
    try pdfRenderer.writePDF(to: outputFileURL, withActions: { context in
        context.beginPage()
        view.layer.render(in: context.cgContext)
    })
} catch {
    print("Could not create PDF file: \(error)")
}

참고 : playgroundSharedDataDirectoryPlayground에서 사용하려면 먼저 macOS "Documents"폴더에 "Shared Playground Data"라는 폴더를 만들어야합니다.

UIViewController아래 의 하위 클래스 전체 구현은 iOS 앱에 대한 이전 예제를 리팩터링하는 가능한 방법을 보여줍니다.

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let view = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
        view.backgroundColor = .orange
        let subView = UIView(frame: CGRect(x: 20, y: 20, width: 40, height: 60))
        subView.backgroundColor = .magenta
        view.addSubview(subView)

        createPDF(from: view)
    }

    func createPDF(from view: UIView) {
        let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
        let outputFileURL = documentDirectory.appendingPathComponent("MyPDF.pdf")
        print("URL:", outputFileURL) // When running on simulator, use the given path to retrieve the PDF file

        let pdfRenderer = UIGraphicsPDFRenderer(bounds: view.bounds)

        do {
            try pdfRenderer.writePDF(to: outputFileURL, withActions: { context in
                context.beginPage()
                view.layer.render(in: context.cgContext)
            })
        } catch {
            print("Could not create PDF file: \(error)")
        }
    }

}

그러면 UIView에서 PDF가 생성되고 인쇄 대화 상자, 목표 C가 열립니다 - (IBAction)PrintPDF:(id)sender. 화면의 버튼에 첨부합니다 . #import <QuartzCore/QuartzCore.h>프레임 워크 추가

H 파일

    @interface YourViewController : UIViewController <MFMailComposeViewControllerDelegate,UIPrintInteractionControllerDelegate>

    {
    UIPrintInteractionController *printController;
    }

- (IBAction)PrintPDF:(id)sender;

M 파일

-(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename

{
    NSMutableData *pdfData = [NSMutableData data];

    UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
    UIGraphicsBeginPDFPage();
    CGContextRef pdfContext = UIGraphicsGetCurrentContext();


    [aView.layer renderInContext:pdfContext];
    UIGraphicsEndPDFContext();

    NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);

    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];
    NSString *file = [documentDirectory stringByAppendingPathComponent:@"yourPDF.pdf"];
    NSURL *urlPdf = [NSURL fileURLWithPath: file];

    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
    NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);

}


- (IBAction)PrintPDF:(id)sender
{
    [self createPDFfromUIView:self.view saveToDocumentsWithFileName:@"yourPDF.pdf"];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"yourPDF.pdf"];
    NSData *myData = [NSData dataWithContentsOfFile: path];

    UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
    if(pic && [UIPrintInteractionController canPrintData: myData] ) {

        pic.delegate = self;

        UIPrintInfo *printInfo = [UIPrintInfo printInfo];
        printInfo.outputType = UIPrintInfoOutputGeneral;
        printInfo.jobName = [path lastPathComponent];
        printInfo.duplex = UIPrintInfoDuplexLongEdge;
        pic.printInfo = printInfo;
        pic.showsPageRange = YES;
        pic.printingItem = myData;

        void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *pic, BOOL completed, NSError *error) {
            //self.content = nil;
            if(!completed && error){

                NSLog(@"Print Error: %@", error);
            }
        };

        [pic presentAnimated:YES completionHandler:completionHandler];

    }

}

이유는 모르겠지만 casilic의 대답은 iOS6.1에서 빈 화면을 제공합니다. 아래 코드가 작동합니다.

-(NSMutableData *)createPDFDatafromUIView:(UIView*)aView 
{
    // 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();

    return pdfData;
}


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

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

    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];

    // instructs the mutable data object to write its context to a file on disk
    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
    NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
    return documentDirectoryFilename;
}