I’m generating images this way:
UIGraphicsBeginImageContextWithOptions(drawingRect.size, YES, [UIScreen mainScreen].nativeScale);
CGContextRef contextRef = UIGraphicsGetCurrentContext();
for(NSInteger i = 0; i < 100; i++)
{
//draw image
UIImage *returningImage = UIGraphicsGetImageFromCurrentImageContext();
NSData *data = UIImagePNGRepresentation(returningImage);
[data writeToFile:[Helper getPathOfFileWithName:[NSString stringWithFormat:#"frame%ld.png", i]] atomically:YES];
}
UIGraphicsEndImageContext();
The question is, how do i save them and use?
Related
I want to manipulate image and shuffle colors. I'm trying to rotate 180 degress with pixels but failed. I don't want to use UIImageView rotate cause i won't just rotate images. I want to do them whatever i want.
EDIT : It was wrong operator. I dont know why i used % instead of / . Anyways i hope this code helps someone(it works).
- (IBAction)shuffleImage:(id)sender {
[self calculateRGBAsAndChangePixels:self.imageView.image atX:0 andY:0];
}
-(void)calculateRGBAsAndChangePixels:(UIImage*)image atX:(int)x andY:(int)y
{
NSUInteger bytesPerPixel = 4;
NSUInteger bytesPerRow = bytesPerPixel * image.size.width;
NSUInteger bitsPerComponent = 8;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef bmContext = CGBitmapContextCreate(NULL, image.size.width, image.size.height, bitsPerComponent,bytesPerRow, colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);
CGContextDrawImage(bmContext, (CGRect){.origin.x = 0.0f, .origin.y = 0.0f, image.size.width, image.size.height}, image.CGImage);
UInt8* data = (UInt8*)CGBitmapContextGetData(bmContext);
const size_t bitmapByteCount = bytesPerRow * image.size.height;
NSMutableArray *reds = [[NSMutableArray alloc] init];
NSMutableArray *greens = [[NSMutableArray alloc] init];
NSMutableArray *blues = [[NSMutableArray alloc] init];
for (size_t i = 0; i < bitmapByteCount; i += 4)
{
[reds addObject:[NSNumber numberWithInt:data[i]]];
[greens addObject:[NSNumber numberWithInt:data[i+1]]];
[blues addObject:[NSNumber numberWithInt:data[i+2]]];
}
for (size_t i = 0; i < bitmapByteCount; i += 4)
{
data[i] = [[reds objectAtIndex:reds.count-i%4-1] integerValue];
data[i+1] = [[greens objectAtIndex:greens.count-i%4-1] integerValue];
data[i+2] = [[blues objectAtIndex:blues.count-i%4-1] integerValue];
}
CGImageRef newImage = CGBitmapContextCreateImage(bmContext);
UIImage *imageView = [[UIImage alloc] initWithCGImage:newImage];
self.imageView.image = imageView;
}
Assuming that you are wanting to make the image turn upside down (rotate it 180) and not mirror it, I found some relevant code on another question that may help you:
static inline double radians (double degrees) {return degrees * M_PI/180;}
UIImage* rotate(UIImage* src, UIImageOrientation orientation)
{
UIGraphicsBeginImageContext(src.size);
CGContextRef context = UIGraphicsGetCurrentContext();
if (orientation == UIImageOrientationRight) {
CGContextRotateCTM (context, radians(90));
} else if (orientation == UIImageOrientationLeft) {
CGContextRotateCTM (context, radians(-90));
} else if (orientation == UIImageOrientationDown) {
// NOTHING
} else if (orientation == UIImageOrientationUp) {
CGContextRotateCTM (context, radians(90));
}
[src drawAtPoint:CGPointMake(0, 0)];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
If you're trying to mirror the image, this code example from this question maybe of help:
UIImage* sourceImage = [UIImage imageNamed:#"whatever.png"];
UIImage* flippedImage = [UIImage imageWithCGImage:sourceImage.CGImage
scale:sourceImage.scale
orientation:UIImageOrientationUpMirrored];
So you're looking to actually manipulate the raw pixel data. Check this out then:
Getting the pixel data from a CGImage object
It's for MacOS but should be relevant for iOS as well.
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?
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);
}
I have to generate PDf from UITableView having multiple sections and rows.
I have generated the pdf as well but the problem is while creating PDF it is cutting the data of some rows and showing on other page.
So Please suggest any dynamic logic that will help in creating PDf having data on the page without going to other Page .
Also Please find code below which I have used to create PDF.
CGRect priorBounds = self.tableView.bounds;
CGSize fittedSize = [self.tableView sizeThatFits:CGSizeMake(priorBounds.size.width, self.tableView.contentSize.height)];
self.tableView.bounds = CGRectMake(0, 0, 612, fittedSize.height);
CGRect pdfPageBounds = CGRectMake(0, 0, 612, 792); // Change this as your need
NSMutableData *pdfData = [[NSMutableData alloc] init];
UIGraphicsBeginPDFContextToData(pdfData, pdfPageBounds, nil); {
for (CGFloat pageOriginY = 0; pageOriginY < fittedSize.height; pageOriginY += pdfPageBounds.size.height) {
UIGraphicsBeginPDFPageWithInfo(pdfPageBounds, nil);
CGContextSaveGState(UIGraphicsGetCurrentContext()); {
CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, -pageOriginY);
[self.tableView.layer renderInContext:UIGraphicsGetCurrentContext()];
} CGContextRestoreGState(UIGraphicsGetCurrentContext());
}
} UIGraphicsEndPDFContext();
self.tableView.bounds = priorBounds; // Reset the tableView
// Use the pdfData to
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
//Get the docs directory
NSString *filePathPDF = [documentsPath stringByAppendingPathComponent:#"image.pdf"]; //Add the file name
[pdfData writeToFile:filePathPDF atomically:YES];
Any help will be appreciated.
After doing a lot R&D on this, finally I got the solution.
I know this to too late to post answer of above question, but I am posting my solution so it may help someone in future.
The trick which I used to avoid this issue is, Run the loop each section wise and took picture of each dynamic cell.
Then I started combining images of cells by below function,
- (UIImage*)imageByCombiningImage:(UIImage*)firstImage withImage:(UIImage*)secondImage {
UIImage *image1 = firstImage;
UIImage *image2 = secondImage;
CGSize size = CGSizeMake(image1.size.width, image1.size.height + image2.size.height);
UIGraphicsBeginImageContext(size);
[image1 drawInRect:CGRectMake(0,0,size.width, image1.size.height)];
[image2 drawInRect:CGRectMake(0,image1.size.height,size.width, image2.size.height)];
UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//set finalImage to IBOulet UIImageView
return finalImage;
}
and to generate combined image, I used below logic. In that I checked the height of combine image, if it is greater than screen size or not.
Below is my whole logic of code,
CGRect priorBounds = self.tableView.bounds;
CGSize fittedSize = [self.tableView sizeThatFits:CGSizeMake(priorBounds.size.width, self.tableView.contentSize.height)];
self.tableView.bounds = CGRectMake(0, 0, fittedSize.width, fittedSize.height);
pdfViews = [[NSMutableArray alloc] init];
NSMutableData *pdfData = [[NSMutableData alloc] init];
float sections = [self.tableView numberOfSections];
for (int C = 0; C < sections; C++)
{
int rows = 0;
rows = [self.tableView numberOfRowsInSection:C];
for (int I = 0; I < rows; I++)
{
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:I inSection:C];
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
UIGraphicsBeginImageContextWithOptions(cell.bounds.size, cell.opaque, 0.0);
[cell.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *cellImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[pdfViews addObject:cellImage];
}
}
NSArray *pageArray = pdfViews;
UIImage *pdfFinalImage = [[UIImage alloc] init];
UIImage *addOnImage = [[UIImage alloc] init];
NSMutableArray *finalA = [[NSMutableArray alloc] init];
int checkHeight;
checkHeight = 1024;
for (int Z = 0; Z < [pdfViews count]; Z++)
{
if (Z == 0)
{
pdfFinalImage = [pageArray objectAtIndex:Z];
}else if (Z+1 == [pdfViews count])
{
addOnImage = [pageArray objectAtIndex:Z];
if (pdfFinalImage.size.height+addOnImage.size.height > checkHeight)
{
[finalA addObject:pdfFinalImage];
pdfFinalImage = [pageArray objectAtIndex:Z];
[finalA addObject:pdfFinalImage];
}else
{
pdfFinalImage = [self imageByCombiningImage:pdfFinalImage withImage:addOnImage];
[finalA addObject:pdfFinalImage];
}
}else
{
UIImage *heightCheckImage = [pageArray objectAtIndex:Z];
if (pdfFinalImage.size.height+heightCheckImage.size.height > checkHeight)
{
[finalA addObject:pdfFinalImage];
pdfFinalImage = [pageArray objectAtIndex:Z];
}else
{
addOnImage = [pageArray objectAtIndex:Z];
pdfFinalImage = [self imageByCombiningImage:pdfFinalImage withImage:addOnImage];
}
}
}
UIGraphicsBeginPDFContextToData(pdfData, CGRectMake(0, 0, 768, 1024), nil);
for (int IC = 0; IC < [finalA count]; IC++)
{
UIGraphicsBeginPDFPage();
UIImage *mainImage = [finalA objectAtIndex:IC];
NSData *jpegData = UIImageJPEGRepresentation(mainImage, 0.5);
CGDataProviderRef dp = CGDataProviderCreateWithCFData((__bridge CFDataRef)jpegData);
CGImageRef cgImage = CGImageCreateWithJPEGDataProvider(dp, NULL, true, kCGRenderingIntentDefault);
[[UIImage imageWithCGImage:cgImage] drawInRect:CGRectMake(0, 0, mainImage.size.width, mainImage.size.height)];
}
UIGraphicsEndPDFContext();
self.tableView.bounds = priorBounds;
[pdfData writeToFile:tmpPdfPath atomically:YES];
I have open pdf file in uiwebview, add image and text in uiwebview subview.Then i tried created pdf file. Below sample i have used to generate pdf file. Multiple page writing in single page. How can i write sample quality and exact size.
Please check screen shots and below source
UIGraphicsBeginPDFContextToData( pdfData, CGRectZero, nil );
for (int i = 0; i < 10; i++) {
CGRect f = [pdfView frame];
[pdfView setFrame: f];
UIGraphicsBeginPDFPage();
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(currentContext, 72, 72); // Translate for 1" margins
[[[pdfView subviews] lastObject] setContentOffset:CGPointMake(0, 648 * i) animated:NO];
[pdfView.layer renderInContext:currentContext];
}
UIGraphicsEndPDFContext();
and also i have tried this following link but i couldn't add uiwebview subview to write the pdf.
http://b2cloud.com.au/tutorial/drawing-over-a-pdf-in-ios-pdf-template/
You can use the following category on UIView to create a PDF file:
#import <QuartzCore/QuartzCore.h>
#implementation UIView(PDFWritingAdditions)
- (void)renderInPDFFile:(NSString*)path
{
CGRect mediaBox = self.bounds;
CGContextRef ctx = CGPDFContextCreateWithURL((CFURLRef)[NSURL fileURLWithPath:path], &mediaBox, NULL);
CGPDFContextBeginPage(ctx, NULL);
CGContextScaleCTM(ctx, 1, -1);
CGContextTranslateCTM(ctx, 0, -mediaBox.size.height);
[self.layer renderInContext:ctx];
CGPDFContextEndPage(ctx);
CFRelease(ctx);
}
#end
Bad news: UIWebView does not create nice shapes and text in the PDF, but renders itself as an image into the PDF.
OR
How to Convert UIView to PDF within iOS?
OR
Creating PDF file from UIWebView
This might helps you :)
I have also used the same its working fine Hope this will be helpful for you.
Create a block:-
typedef void (^PdfCompletion)(BOOL status,NSString *filePath,NSArray *fbArr);
-(void)addData
{
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
NSMutableDictionary *contactDict = [[NSMutableDictionary alloc] init];
[contactDict setObject:contactTextField.text forKey:#"phonenumber"];
[contactDict setObject:emailTextField.text forKey:#"emailid"];
[contactDict setObject:userNameLabel.text forKey:#"displayname"];
[self drawPdf:contactDict completion:^(BOOL status,NSString *filePath,NSArray *fbArr)
{
if (status)
{
NSMutableArray *arr;
arr = [[NSMutableArray alloc] init];
NSData *filedata;
filedata = [NSData dataWithContentsOfFile:filePath];
double locaTotalFileSize = filedata.length +498;
totalFileSize += locaTotalFileSize;
NSMutableDictionary *fileDict = [[NSMutableDictionary alloc] init];
[fileDict setObject:userPicImageView.image forKey:#"image"];
[fileDict setObject:filePath forKey:#"filePath"];
[fileDict setObject:#"txt" forKey:#"fileType"];
[fileDict setObject:[NSString stringWithFormat:#"%#_%#_%#",#"contact",[self getFbID],[self CurrentSystemTime]] forKey:#"fileName"];
[fileDict setObject:#"1" forKey:#"uploadStatus"];
[fileDict setObject:#"0 KB/0 KB" forKey:#"fileSizeStatus"];
[fileDict setObject:#"0 KB/0 KB" forKey:#"ContentSize"];
[arr addObject:fileDict];
[self switchToReviewFiles:arr];
//////NSLog(#"pdf convrt successfull");
}
else
{
//////NSLog(#"Error to convert into pdf");
}
}];
}
// Then Call The DrawPDF Method::--
-(void)drawPdf:(NSMutableDictionary *)drawText completion:(PdfCompletion)callback
{
NSString* fileName = #"contact_card.txt";
NSArray *arrayPaths =
NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *path = [arrayPaths objectAtIndex:0];
NSString* txtFileName = [path stringByAppendingPathComponent:fileName];
NSData *data = [NSJSONSerialization dataWithJSONObject:drawText options:NSJSONWritingPrettyPrinted error:nil];
[data writeToFile:txtFileName atomically:YES];
callback(YES,txtFileName,nil);
}
It looks to me like you're just trying to add content to an existing PDF, right?
- (void) drawCustomPDFContent
{
// Put your drawing calls here
// Draw a red box
[[UIColor redColor] set];
UIRectFill(CGRectMake(20, 20, 100, 100));
// Example of drawing your view into PDF, note that this will be a rasterized bitmap, including the text.
// To get smoother text you'll need to use the NSString draw methods
CGContextRef ctx = UIGraphicsGetCurrentContext();
[view.layer renderInContext:ctx];
}
- (void) createCustomPDF
{
NSURL* pdfURL = ... /* URL to pdf file */;
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL);
const size_t numberOfPages = CGPDFDocumentGetNumberOfPages(pdf);
NSMutableData* data = [NSMutableData data];
UIGraphicsBeginPDFContextToData(data, CGRectZero, nil);
for(size_t page = 1; page <= numberOfPages; page++)
{
// Get the current page and page frame
CGPDFPageRef pdfPage = CGPDFDocumentGetPage(pdf, page);
const CGRect pageFrame = CGPDFPageGetBoxRect(pdfPage, kCGPDFMediaBox);
UIGraphicsBeginPDFPageWithInfo(pageFrame, nil);
// Draw the page (flipped)
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSaveGState(ctx);
CGContextScaleCTM(ctx, 1, -1);
CGContextTranslateCTM(ctx, 0, -pageFrame.size.height);
CGContextDrawPDFPage(ctx, pdfPage);
CGContextRestoreGState(ctx);
if(page == 1)
{
[self drawCustomPDFContent];
}
}
UIGraphicsEndPDFContext();
CGPDFDocumentRelease(pdf);
pdf = nil;
// Do something with data here
[data writeToFile:... atomically:YES];
}
Parts referenced from:
http://b2cloud.com.au/tutorial/drawing-over-a-pdf-in-ios-pdf-template/
You can try this.It worked for me :)
https://github.com/iclems/iOS-htmltopdf/blob/master/NDHTMLtoPDF.h
NSString *html = [webView stringByEvaluatingJavaScriptFromString:#"document.documentElement.outerHTML"];
self.PDFCreator = [NDHTMLtoPDF createPDFWithHTML:html
pathForPDF:[path stringByExpandingTildeInPath]
delegate:self
pageSize:CGSizeMake(595,847)
margins:UIEdgeInsetsMake(105, 0, 0, 0)];
Pass the webView like this
You are actually very close with the code you have. I have a feeling your biggest problem is grabbing a new CGContextRef with each loop iteration..
UIGraphicsBeginPDFContextToData( pdfData, CGRectZero, nil );
CGContextRef currentContext = UIGraphicsGetCurrentContext();//movedByJef
// default pdf..
// 8.5 X 11 inch
// 612 x 792
for (int i = 0; i < 10; i++) {
CGContextSaveGstate( currentContext ); //addedByJef
CGRect f = [pdfView frame];
[pdfView setFrame: f]; // hmm what does this even do??
UIGraphicsBeginPDFPage();
CGContextTranslateCTM(currentContext, -72, -72); // Translate for 1" margins ///editedByJef, you had it backwards..
//assuming you want a 72pt margin on right and bottom as well..
//we want to reduce our size (612 x 792) by 72pts on all four sides..
CGSize printPageSize = CGSizeMake( (612.0 - (72.0 * 2.0)), (792.0 -(72.0*2.0)) );
CGSize layrSize = self.layer.bounds.size;
//so we translate the context so our view fills it nicely..
CGFloat xScaler = layrSize.width / printPageSize.width;
CGFloat yScaler = layrSize.height / printPageSize.height;
CGContextConcatCTM(currentContext, CGAffineTransformMakeScale(xScaler, yScaler) );
[[[pdfView subviews] lastObject] setContentOffset:CGPointMake(0, 648 * i) animated:NO];
[pdfView.layer renderInContext:currentContext];
CGContextRestoreGstate(currentContext);//added by jef
}
UIGraphicsEndPDFContext();
let me know how you go with that, There will undoubtedly be a bit of shuffling in the order of the transforms, maybe a translate needed either side of the scaling, but this should get you really close..
I need to embed thumbnails in large hq PDF files, which I create using UIGraphicsBeginPDFContextToFile and UIGraphicsBeginPDFPage and drawing text and images on them.
Does anyone know, how to embed page thumbs?
Ciao, Arno
If you want to create a thumbnail from a PDF, then you could use the code below. This code writes it to disk. It's easy to change it so that the method returns the image.
- (void)createPDFThumbnailForFile:(NSString *)theFilename {
if (!theFilename) {return;}
#try {
NSString *path = [FileInfo fullPathForFile:theFilename];
NSURL *pdfFileUrl = [NSURL fileURLWithPath:path];
CFURLRef pdfFileRef = (__bridge CFURLRef) pdfFileUrl;
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithURL(pdfFileRef);
CGPDFPageRef page;
CGRect aRect = CGRectMake(0, 0, 70, 100); // thumbnail size
UIGraphicsBeginImageContext(aRect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
UIImage *thumbnailImage;
// NSUInteger totalNum = CGPDFDocumentGetNumberOfPages(pdf);
//we only want the first page
for (int i = 0; i < 1; i++) {
CGContextSaveGState(context);
CGContextTranslateCTM(context, 0.0, aRect.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextSetGrayFillColor(context, 1.0, 1.0);
CGContextFillRect(context, aRect);
// Grab the first PDF page
page = CGPDFDocumentGetPage(pdf, 1);
CGAffineTransform pdfTransform = CGPDFPageGetDrawingTransform(page, kCGPDFMediaBox, aRect, 0, true);
// And apply the transform.
CGContextConcatCTM(context, pdfTransform);
CGContextDrawPDFPage(context, page);
// Create the new UIImage from the context
thumbnailImage = UIGraphicsGetImageFromCurrentImageContext();
CGContextRestoreGState(context);
}
CGPDFDocumentRelease(pdf);
NSString *pngPath = [path stringByReplacingOccurrencesOfString:#".pdf" withString:#".png"];
// [#"test" writeToFile:pngPath atomically:YES encoding:NSUTF8StringEncoding error:nil];
[UIImagePNGRepresentation(thumbnailImage) writeToFile:pngPath atomically:YES];
}
#catch (NSException *exception) {
DebugLog(#"Could not write thumbnail to : %# /n --> %#", theFileToSave, exception.description);
}
}