在iOS中合并2个pdf文件

我正在尝试在iOS中合并两个PDF文件。我正在一页一页地合并。如果文件很大，则需要花费大量时间。有没有办法，我们可以合并这两个文件，而不是一页一页地合并

如果你愿意，我可以发布我的代码

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我的代码类似于一个

试试下面的代码。它把第一个pdf文件加起来，然后在第二个pdf文件上加上一个pdf文件

NSString *cacheDir = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];

// File paths
NSString *pdfPath1 = [[NSBundle mainBundle] pathForResource:@"pdf1" ofType:@"pdf"];
NSString *pdfPath2 = [cacheDir stringByAppendingPathComponent:@"temp.pdf"];
NSString *pdfPathOutput = [cacheDir stringByAppendingPathComponent:@"out.pdf"];

// File URLs - bridge casting for ARC
CFURLRef pdfURL1 = (__bridge_retained CFURLRef)[[NSURL alloc] initFileURLWithPath:(NSString *)pdfPath1];//(CFURLRef) NSURL
CFURLRef pdfURL2 = (__bridge_retained CFURLRef)[[NSURL alloc] initFileURLWithPath:(NSString *)pdfPath2];//(CFURLRef)
CFURLRef pdfURLOutput =(__bridge_retained CFURLRef) [[NSURL alloc] initFileURLWithPath:(NSString *)pdfPathOutput];//(CFURLRef)

// File references
CGPDFDocumentRef pdfRef1 = CGPDFDocumentCreateWithURL((CFURLRef) pdfURL1);
CGPDFDocumentRef pdfRef2 = CGPDFDocumentCreateWithURL((CFURLRef) pdfURL2);

// Number of pages
NSInteger numberOfPages1 = CGPDFDocumentGetNumberOfPages(pdfRef1);
NSInteger numberOfPages2 = CGPDFDocumentGetNumberOfPages(pdfRef2);

// Create the output context
CGContextRef writeContext = CGPDFContextCreateWithURL(pdfURLOutput, NULL, NULL);

// Loop variables
CGPDFPageRef page;
CGRect mediaBox;

// Read the first PDF and generate the output pages
NSLog(@"GENERATING PAGES FROM PDF 1 (%i)...", numberOfPages1);
for (int i=1; i<=numberOfPages1; i++) {
    page = CGPDFDocumentGetPage(pdfRef1, i);
    mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
    CGContextBeginPage(writeContext, &mediaBox);
    CGContextDrawPDFPage(writeContext, page);
    CGContextEndPage(writeContext);
}

// Read the second PDF and generate the output pages
NSLog(@"GENERATING PAGES FROM PDF 2 (%i)...", numberOfPages2);
for (int i=1; i<=numberOfPages2; i++) {
    page = CGPDFDocumentGetPage(pdfRef2, i);
    mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
    CGContextBeginPage(writeContext, &mediaBox);
    CGContextDrawPDFPage(writeContext, page);
    CGContextEndPage(writeContext);      
}
NSLog(@"DONE!");

// Finalize the output file
CGPDFContextClose(writeContext);

// Release from memory
CFRelease(pdfURL1);
CFRelease(pdfURL2);
CFRelease(pdfURLOutput);
CGPDFDocumentRelease(pdfRef1);
CGPDFDocumentRelease(pdfRef2);
CGContextRelease(writeContext);

NSString*cacheDir=[NSSearchPathForDirectoriesInDomains（NSCachesDirectory，NSUserDomainMask，YES）lastObject]；
//文件路径
NSString*pdfPath1=[[NSBundle mainBundle]pathForResource:@“pdf1”类型：@“pdf”]；
NSString*pdfPath2=[cacheDir stringByAppendingPathComponent:@“temp.pdf”]；
NSString*pdfPathOutput=[cacheDir stringByAppendingPathComponent:@“out.pdf”]；
//文件URL-弧的桥接转换
CFURLRef pdfURL1=（uu_桥_保留CFURLRef）[[NSURL alloc]initFileURLWithPath:（NSString*）pdfPath1]//（CFURLRef）NSURL
CFURLRef pdfURL2=（uu_桥_保留的CFURLRef）[[NSURL alloc]initFileURLWithPath:（NSString*）pdfPath2]//（CFURLRef）
CFURLRef Pdforloutput=（uu_桥_保留CFURLRef）[[NSURL alloc]initFileURLWithPath:（NSString*）pdfPathOutput]//（CFURLRef）
//文件引用
CGPDFDocumentRef pdfRef1=CGPDFDocumentCreateWithURL（（CFURLRef）pdfURL1）；
CGPDFDocumentRef pdfRef2=CGPDFDocumentCreateWithURL（（CFURLRef）pdfURL2）；
//页数
NSInteger numberOfPages1=CGPDFDocumentGetNumberOfPages（pdfRef1）；
NSInteger numberOfPages2=CGPDFDocumentGetNumberOfPages（pdfRef2）；
//创建输出上下文
CGContextRef writeContext=CGPDFContextCreateWithURL（pdfURLOutput，NULL，NULL）；
//循环变量
CGPDFPageRef页面；
CGRect媒体盒；
//阅读第一份PDF并生成输出页面
NSLog（@“从PDF 1（%i）…生成页面”，numberOfPages1）；
对于（int i=1；i对任意数量的PDF使用此方法，这可能有助于

+ (NSString *)joinPDF:(NSArray *)listOfPath{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *layOutPath=[NSString stringWithFormat:@"%@/mergepdf/pdf",[paths objectAtIndex:0]];
    if(![[NSFileManager defaultManager] fileExistsAtPath:layOutPath]){
        [[NSFileManager defaultManager] createDirectoryAtPath:layOutPath withIntermediateDirectories:YES attributes:nil error:nil];        
    } 
    // File paths
    NSString *fileName = @"ALL.pdf";
    NSString *pdfPathOutput = [layOutPath stringByAppendingPathComponent:fileName];
    CFURLRef pdfURLOutput = (__bridge CFURLRef)[NSURL fileURLWithPath:pdfPathOutput];
    NSInteger numberOfPages = 0;
    // Create the output context
    CGContextRef writeContext = CGPDFContextCreateWithURL(pdfURLOutput, NULL, NULL);

    for (NSString *source in listOfPath) {
//        CFURLRef pdfURL = (__bridge CFURLRef)[NSURL fileURLWithPath:source];

       CFURLRef pdfURL =  CFURLCreateFromFileSystemRepresentation(NULL, [source UTF8String],[source length], NO);

        //file ref
        CGPDFDocumentRef pdfRef = CGPDFDocumentCreateWithURL(pdfURL);
        numberOfPages = CGPDFDocumentGetNumberOfPages(pdfRef);

        // Loop variables
        CGPDFPageRef page;
        CGRect mediaBox;

        // Read the first PDF and generate the output pages
        DLog(@"GENERATING PAGES FROM PDF 1 (%@)...", source);
        for (int i=1; i<=numberOfPages; i++) {
            page = CGPDFDocumentGetPage(pdfRef, i);
            mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
            CGContextBeginPage(writeContext, &mediaBox);
            CGContextDrawPDFPage(writeContext, page);
            CGContextEndPage(writeContext);
        }

        CGPDFDocumentRelease(pdfRef);
        CFRelease(pdfURL);
    }
  // CFRelease(pdfURLOutput);
//    
//    // Finalize the output file
   CGPDFContextClose(writeContext);
    CGContextRelease(writeContext);

    return pdfPathOutput;
}

+（NSString*）joinPDF:（NSArray*）列表路径{
NSArray*Path=NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，是）；
NSString*layOutPath=[NSString stringWithFormat:@“%@/mergepdf/pdf”，[PATH objectAtIndex:0]]；
如果（！[[NSFileManager defaultManager]文件存在路径：layOutPath]）{
[[NSFileManager defaultManager]createDirectoryAtPath:layOutPath with IntermediateDirectory:YES属性：nil错误：nil]；
} 
//文件路径
NSString*fileName=@“ALL.pdf”；
NSString*pdfPathOutput=[layOutPath stringByAppendingPathComponent:fileName]；
CFURLRef Pdforloutput=（u_桥CFURLRef）[NSURL fileURLWithPath:pdfPathOutput]；
NSInteger numberOfPages=0；
//创建输出上下文
CGContextRef writeContext=CGPDFContextCreateWithURL（pdfURLOutput，NULL，NULL）；
for（listOfPath中的NSString*源）{
//CFURLRef pdfURL=（uu桥CFURLRef）[NSURL fileURLWithPath:source]；
CFURLRef pdfURL=CFURLCreateFromFileSystemRepresentation（NULL，[源UTF8String]，[源长度]，否）；
//文件引用
CGPDFDocumentRef pdfRef=CGPDFDocumentCreateWithURL（pdfURL）；
numberOfPages=CGPDFDocumentGetNumberOfPages（pdfRef）；
//循环变量
CGPDFPageRef页面；
CGRect媒体盒；
//阅读第一份PDF并生成输出页面
DLog（@“从PDF 1生成页面（%@）…”，来源）；
for（int i=1；如果你知道pdf文件的路径，我可以跟随我的帖子完美！谢谢。可惜它从来没有被标记为正确答案。没有被标记为答案。@Nathan因为你从来没有因为复制过去而得到奖励我修改了这段代码来处理NSData，而不是处理文件。效果很好