パスワードで保護されたPDFファイルに画像を挿入する目的C

Question

iOSのPDFファイルに画像を挿入するのは簡単です。しかし、パスワードで保護されたPDFに画像を挿入する方法はありますか？

Answer 1

後で作業して解決しました。

 NSString *pdfFilePath1 = [self getPDFFileName]; 
    pdfData = [NSData dataWithContentsOfFile:pdfFilePath1]; 
    NSMutableData* outputPDFData = [[NSMutableData alloc] init]; 

    CGDataConsumerRef dataConsumer =CGDataConsumerCreateWithCFData((CFMutableDataRef)outputPDFData); 

    CFMutableDictionaryRef attrDictionary = NULL; 
    attrDictionary = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); 
    CFDictionarySetValue(attrDictionary, kCGPDFContextTitle, @"My Doc"); 
    ///Set password 
    CFDictionarySetValue(attrDictionary, kCGPDFContextUserPassword, CFSTR("userpassword")); 
    CFDictionarySetValue(attrDictionary, kCGPDFContextOwnerPassword, CFSTR("ownerpassword")); 
    /// 
    CGContextRef pdfContext = CGPDFContextCreate(dataConsumer, NULL, attrDictionary); 
    CFRelease(dataConsumer); 
    CFRelease(attrDictionary); 
    CGRect pageRect; 

    // Draw the old "pdfData" on pdfContext 
    CFDataRef myPDFData = (__bridge CFDataRef) pdfData; 
    CGDataProviderRef provider = CGDataProviderCreateWithCFData(myPDFData); 
    CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(provider); 
//Pass Password to PDF 
    CGPDFDocumentUnlockWithPassword(pdf, "userpassword"); 
    CGDataProviderRelease(provider); 


    size_t numPages = CGPDFDocumentGetNumberOfPages(pdf); 
    if (numPages > 0) { 
     // Loop through each page in the source file 
     for (size_t i = 1; i <= numPages; i++) { 
      CGPDFPageRef pdfPage = CGPDFDocumentGetPage(pdf, i); 
      if (pdfPage) { 
       // Get the page size 
       CGRect pdfCropTempBoxRect = CGPDFPageGetBoxRect(pdfPage, kCGPDFMediaBox); 
       //CGRect pdfCropBoxRect=CGRectMake(0, 0, _docPanel.frame.size.width, _docPanel.frame.size.height); 

       if(i==pageNumber) 
       { 
        int offset=1; 
        int offset_y=editView.frame.size.height; 
        if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) 
        { 
         offset=10; 
         offset_y=0; 
        } 

        // Copy the page from the source file to the context 
        CGContextBeginPage(pdfContext, &pdfCropTempBoxRect); 
        CGContextDrawPDFPage(pdfContext, pdfPage); 

        CGFloat contentHeight = self.docPanel.scrollView.contentSize.height; 
        self.pdfPageHeight = contentHeight/self.pdfPageCount; 

        // also calculate what half the screen height is. no sense in doing this multiple times. 
        self.halfScreenHeight = (self.docPanel.frame.size.height/2); 

        float imgX=(editView.frame.origin.x/_docPanel.frame.size.width)*(pdfCropTempBoxRect.size.width); 
        //float imgY=(1-(verticalContentOffset-self.pdfPageHeight*(i-1)+editView.frame.origin.y+editView.frame.size.height)/self.pdfPageHeight)*pdfCropTempBoxRect.size.height-(i-1)*offset+offset_y; 
        float imgY=(1-(verticalContentOffset-self.pdfPageHeight*(i-1)+editView.frame.origin.y+editView.frame.size.height)/self.pdfPageHeight)*pdfCropTempBoxRect.size.height+offset_y; 
        // imgY = (pageNumber*self.pdfPageHeight)-imgY; 
        if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) 
        { 
         imgY = imgY - (editView.frame.size.height/2); 
        } 
        pageRect = CGRectMake(imgX,imgY,editView.frame.size.width-2 ,editView.frame.size.height-2); 


        CGImageRef pageImage = [img CGImage]; 
        CGContextDrawImage(pdfContext, pageRect, pageImage); 

        //CGPDFContextEndPage(pdfContext); 

        CGPDFContextEndPage(pdfContext); 
       } 
       else 
       { 
        CGContextBeginPage(pdfContext, &pdfCropTempBoxRect); 
        CGContextDrawPDFPage(pdfContext, pdfPage); 
        CGPDFContextEndPage(pdfContext); 
       } 
      } 
     } 
    } 




    CGPDFContextClose(pdfContext); 
    CGContextRelease(pdfContext); 



    NSString *pdfFilePath = [self getPDFFileName]; 
    [outputPDFData writeToFile:pdfFilePath atomically:YES];