Iphone 如何从pdf文件中的文件附件批注获取图像

我正在开发PDF注释应用程序我在iPhone中添加了PDF文件注释它工作正常it注释也可见任何读者但面临一个问题如何从PDF文件中的文件附件注释获取图像从桌面创建注释如何解决此问题

我正在使用这段代码从文件附件中获取注释的内容和位置，注释工作正常

CGPDFDictionaryRef pageDictionary = CGPDFPageGetDictionary(pPage);
  //  NSLog(@"%@",(NSDictionary*)pageDictionary);
    CGPDFArrayRef outputArray;
    if(!CGPDFDictionaryGetArray(pageDictionary, "Annots", &outputArray)) {
        [pdfAnnots release];
        return nil;
    }
 CGPDFArrayRef rectArray;
            if(!CGPDFDictionaryGetArray(annotDict, "Rect", &rectArray)) {
                break;
            }

            int arrayCount = CGPDFArrayGetCount( rectArray );
            CGPDFReal coords[4];
            for( int k = 0; k < arrayCount; ++k ) {
                CGPDFObjectRef rectObj;
                if(!CGPDFArrayGetObject(rectArray, k, &rectObj)) {
                    break;
                }

                CGPDFReal coord;
                if(!CGPDFObjectGetValue(rectObj, kCGPDFObjectTypeReal, &coord)) {
                    break;
                }

                coords[k] = coord;
            }               

            CGRect rect = CGRectMake(coords[0],coords[1],coords[2],coords[3]);

            NSLog(@"%@",NSStringFromCGRect(rect));

请帮帮我

提前感谢

终于得到解决方案了

CGPDFDictionaryRef aDict;
    NSData *imagedata=nil;
    if(CGPDFDictionaryGetDictionary(annotDict, "FS", &aDict))
    {
        CGPDFDictionaryRef embeddedFiles;
        if (CGPDFDictionaryGetDictionary (aDict, "EF", &embeddedFiles) )
        {

            CGPDFStreamRef streamDict;
            if (CGPDFDictionaryGetStream(embeddedFiles, "F", &streamDict))
            {
                CGPDFDataFormat *format = NULL;
                CFDataRef xmlData;

                xmlData = CGPDFStreamCopyData (streamDict, format);
                imagedata=(NSData*)xmlData;

                  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                  NSString *documentsDirectory = [paths objectAtIndex:0];
               savedImagePath = [documentsDirectory stringByAppendingPathComponent:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
               [(NSData*)xmlData writeToFile:savedImagePath atomically:NO];
            }
        }
    }

CGPDFDictionaryRef aDict;
    NSData *imagedata=nil;
    if(CGPDFDictionaryGetDictionary(annotDict, "FS", &aDict))
    {
        CGPDFDictionaryRef embeddedFiles;
        if (CGPDFDictionaryGetDictionary (aDict, "EF", &embeddedFiles) )
        {

            CGPDFStreamRef streamDict;
            if (CGPDFDictionaryGetStream(embeddedFiles, "F", &streamDict))
            {
                CGPDFDataFormat *format = NULL;
                CFDataRef xmlData;

                xmlData = CGPDFStreamCopyData (streamDict, format);
                imagedata=(NSData*)xmlData;

                  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                  NSString *documentsDirectory = [paths objectAtIndex:0];
               savedImagePath = [documentsDirectory stringByAppendingPathComponent:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
               [(NSData*)xmlData writeToFile:savedImagePath atomically:NO];
            }
        }
    }