countPdfPages.m

#import <Foundation/Foundation.h>
#import <Quartz/Quartz.h>


int main (int argc, const char * argv[]) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	
	// collecting the given command line arguments
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	NSString *pdfFilePath = [userDefaults stringForKey:@"file"];
	if (!pdfFilePath) {
		printf("Error: Missing PDF file path (-file)\n");
		return 1;
	}
	
	// does the given PDF file path exist? and if so, is it a folder?
	NSFileManager *fileManager = [NSFileManager defaultManager];
	BOOL isDir;
	if (![fileManager fileExistsAtPath:pdfFilePath isDirectory:&isDir]) {
		printf("Error: The given PDF file path does not exist:\n\t%s\n", [pdfFilePath UTF8String]);
		return 1;
	} else {
		if (isDir) {
			printf("Error: The given PDF file points to a directory:\n\t%s\n", [pdfFilePath UTF8String]);
			return 1;
		}
	}
	
	// creating the PDF object
	NSURL *pdfFileURL = [NSURL fileURLWithPath:pdfFilePath];
	PDFDocument *pdfDoc = [[PDFDocument alloc] initWithURL:pdfFileURL];
	if (!pdfDoc) {
		printf("Error: We could not create a PDF object from the given file path:\n\t%s\n", [pdfFilePath UTF8String]);
		return 1;
	}
	
	//printing the page count!
	int pageNums = [pdfDoc pageCount];
	[pdfDoc release];
	printf("Page count: %i\n", pageNums);
	
    [pool drain];
    return 0;
}