Converting a UIWebView to PDF/Image gives only one inch wide output - ios

Question

I'm converting a UIWebView to pdf/image with the help of the following code:
NSString *heightStr = [webView stringByEvaluatingJavaScriptFromString:#"document.body.scrollHeight;"];
int height = [heightStr intValue];
CGFloat screenHeight = webView.bounds.size.height;
int pages = ceil(height / screenHeight);
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, webView.bounds, nil);
CGRect frame = [webView frame];
NSMutableArray *imageArray= [[NSMutableArray alloc]init];
for (int i = 0; i < pages; i++)
{
// Check to screenHeight if page draws more than the height of the UIWebView
if ((i+1) * screenHeight > height)
{
CGRect f = [webView frame];
f.size.height -= (((i+1) * screenHeight) - height);
[webView setFrame: f];
}
UIGraphicsBeginImageContext(frame.size);
UIGraphicsBeginPDFPage();
CGContextRef currentContext = UIGraphicsGetCurrentContext();
//CGContextTranslateCTM(currentContext, 72, 72); // Translate for 1" margins
[[[webView subviews] lastObject] setContentOffset:CGPointMake(0, screenHeight * i) animated:NO];
[webView.layer renderInContext:currentContext];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
[imageArray insertObject:viewImage atIndex:imageArray.count] ;
UIGraphicsEndImageContext();
}
UIGraphicsEndPDFContext();
[webView setFrame:frame];
//Send all images
NSData *imgData = [self blendImages:imageArray];
//Final Image
UIImage *finalImage = [UIImage imageWithData:imgData];
-(NSData*)blendImages:(NSMutableArray *)arrImage{
// get data from document
CGFloat height=0 ,width=0 ;
UIImage *tempImg = [arrImage objectAtIndex:0] ;
width =tempImg.size.width ;
for (int i = 0 ; i<arrImage.count ; i++){
UIImage *img= [arrImage objectAtIndex:i];
height = img.size.height +height;
}
CGSize size = CGSizeMake(width, height) ;
UIGraphicsBeginImageContext(size);
CGFloat h = 0;
for (int i=0; i<arrImage.count; i++) {
UIImage* uiimage = [arrImage objectAtIndex:i];
[uiimage drawAtPoint:CGPointMake(0, h) blendMode:kCGBlendModeNormal alpha:1.0];
h = uiimage.size.height +h ;
}
NSData *imageData = UIImagePNGRepresentation(UIGraphicsGetImageFromCurrentImageContext());
UIGraphicsEndImageContext();
return imageData;
}
But I'm getting only one inch wide output. Also the whole contains fits in one page and make it unreadable. How to make A4 sized output?

Answer 1

This creates a PDF of a screenshot of a webpage - might help get you started :)
- (IBAction)makePDF:(id)sender
{
UIGraphicsBeginImageContextWithOptions(webView.scrollView.contentSize, webView.scrollView.opaque, 0.0);
webView.scrollView.contentOffset = CGPointZero;
webView.scrollView.frame = CGRectMake(0, 0, webView.scrollView.contentSize.width, webView.scrollView.contentSize.height);
[webView.scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGRect imageFrame = CGRectMake(0, 0, image.size.width, image.size.height);
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, imageFrame, nil);
//full screenshot
UIGraphicsBeginPDFPage();
UIImageView *imageView = [[UIImageView alloc] initWithFrame:imageFrame];
[imageView setContentMode:UIViewContentModeScaleAspectFit];
[imageView setImage:image];
[imageView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIGraphicsEndPDFContext();
NSArray *documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *documentDirectory = [documentDirectories objectAtIndex:0];
NSString *fileName = [NSString stringWithFormat:#"%#.pdf",[NSDate date]];
NSString *path = [documentDirectory stringByAppendingPathComponent:fileName];
// save to disk
[pdfData writeToFile:path atomically:YES];
NSLog(#"pdf in %#", path);
}