是否可以在iPhone中以编程方式将多个pdf文件合并为一个pdf文件? [英] Is it possible to combine multiple pdf files into a single pdf file programmatically in iphone?

问题描述

是否可以在iPhone中以编程方式将多个pdf文件组合为一个pdf文件.我已经从程序的不同部分创建了单独的页面，现在需要将它们合并为一个文件

Is it possible to combine multiple pdf files into a single pdf file programmatically in iphone.I have created individual pages from different parts of my program and now need to merge them into a single file

推荐答案

是的，您可以这样做.请遵循以下代码

Yes you can do that. Please follow the below code

//Open a pdf context for the single file
UIGraphicsBeginPDFContextToFile(oldFile, paperSize, nil);

//Run a loop to the number of pages you want
for (pageNumber = 1; pageNumber <= count; pageNumber++)
{
//Open a pdf page context
UIGraphicsBeginPDFPageWithInfo(paperSize, nil);

//Get graphics context to draw the page
CGContextRef currentContext = UIGraphicsGetCurrentContext();

//Flip and scale context to draw the pdf correctly
CGContextTranslateCTM(currentContext, 0, paperSize.size.height);
CGContextScaleCTM(currentContext, 1.0, -1.0); 

//Get document access of the pdf from which you want a page
CGPDFDocumentRef newDocument = CGPDFDocumentCreateWithURL ((CFURLRef) newUrl);

//Get the page you want
CGPDFPageRef newPage = CGPDFDocumentGetPage (newDocument, pageNumber);

//Drawing the page
CGContextDrawPDFPage (currentContext, newPage);

//Clean up
newPage = nil;       
CGPDFDocumentRelease(newDocument);
newDocument = nil;
newUrl = nil;

}

UIGraphicsEndPDFContext();

因此，在绘制页面之前，您必须编写从适当的pdf中获取适当页面的必要条件.您已经从多个来源创建了pdf文件！

So you have to write necessary condition of taking appropriate pages from appropriate pdf before draw the page. You have created a pdf from multiple sources!

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