PDF转jpg

 /Users/mac/Library/Developer/CoreSimulator/Devices/38BB3233-7551-4DBE-A3D9-58934568818D/data/Containers/Data/Application/B4866C5A-B68E-437F-A787-8C83FC7D13D2/Documents/

上面模拟器Documents文件里添加pdf文件test.pdf

调用：

[self createJPGsFromPDF:test.pdf];

-(void) createJPGsFromPDF:(NSString *)fromPDFName

{

    

    if (fromPDFName == nil || [fromPDFName isEqualToString:@""]) {

        return;

    }

    

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDir = [paths objectAtIndex:0];

    

    NSString *docPath = [documentsDir stringByAppendingPathComponent:fromPDFName];

    

    

    NSURL *fromPDFURL = [NSURL fileURLWithPath:docPath];

    CGPDFDocumentRef fromPDFDoc = CGPDFDocumentCreateWithURL((CFURLRef) fromPDFURL);

   

    // Get Total Pages

    float pages = CGPDFDocumentGetNumberOfPages(fromPDFDoc);

    

    // Create Folder for store under "Documents/"

    NSError *error = nil;

    NSFileManager *fileManager = [[NSFileManager alloc] init];

    NSString *folderPath = [documentsDir stringByAppendingPathComponent:[fromPDFName stringByDeletingPathExtension]];

    [fileManager createDirectoryAtPath:folderPath withIntermediateDirectories:YES attributes:nil error:&error];

    

    int i = 1;

    for (i = 1; i <= pages; i++) {

        CGPDFPageRef pageRef = CGPDFDocumentGetPage(fromPDFDoc, i);

        CGPDFPageRetain(pageRef);

        

        // determine the size of the PDF page

        CGRect pageRect = CGPDFPageGetBoxRect(pageRef, kCGPDFMediaBox);

        

        // renders its content.

        UIGraphicsBeginImageContext(pageRect.size);

        

        CGContextRef imgContext = UIGraphicsGetCurrentContext();

        CGContextSaveGState(imgContext);

        CGContextTranslateCTM(imgContext, 0.0, pageRect.size.height);

        CGContextScaleCTM(imgContext, 1.0, -1.0);

        CGContextSetInterpolationQuality(imgContext, kCGInterpolationDefault);

        CGContextSetRenderingIntent(imgContext, kCGRenderingIntentDefault);

        CGContextDrawPDFPage(imgContext, pageRef);

        CGContextRestoreGState(imgContext);

        

        //PDF Page to image

        UIImage *tempImage = UIGraphicsGetImageFromCurrentImageContext();

        

        UIGraphicsEndImageContext();

        //Release current source page

        CGPDFPageRelease(pageRef);

        

        // Store IMG

        NSString *imgname = [NSString stringWithFormat:@"fromPDFName_%d.jpg", i];

        NSString *imgPath = [folderPath stringByAppendingPathComponent:imgname];

        [UIImageJPEGRepresentation(tempImage, 1.0) writeToFile:imgPath atomically:YES];

        

    }

    

    CGPDFDocumentRelease(fromPDFDoc);

    

}