I am successfully displaying text, but how can i display image in the pdf file ?
Actually I am new to pdf conversion
Thanks in advance.
i do it this way, my basic image is in a NSData object:
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, CGRectMake(0, 0, 2480, 3508), nil);
UIImage *aImg = [UIImage imageWithData:myImageData];
UIGraphicsBeginPDFPage();
NSData *jpegData = UIImageJPEGRepresentation(aImg, 0.5);
CGDataProviderRef dp = CGDataProviderCreateWithCFData((__bridge CFDataRef)jpegData);
CGImageRef cgImage = CGImageCreateWithJPEGDataProvider(dp, NULL, true, kCGRenderingIntentDefault);
[[UIImage imageWithCGImage:cgImage] drawInRect:CGRectMake(0, 0, aImg.size.width, aImg.size.height)];
UIGraphicsEndPDFContext();
return pdfData;
Related
I am converting each PPT slide into images and creating a PDF from them. Images are created properly with their original sizes. Now to create PDF I am using below code.
CGSize paperSize = CGSizeMake(595.2,841.8);
NSString *strPath = [[documentsPaths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:#"slide%i.png", i]];
NSData *imgData = [[NSData alloc] initWithContentsOfURL:[NSURL fileURLWithPath:strPath]];
UIImage *image = [[UIImage alloc] initWithData:imgData];
CGRect rect = CGRectMake(0, 0,paperSize.width ,paperSize.height);
UIGraphicsBeginPDFPageWithInfo(rect, nil);
[image drawInRect:rect];
UIGraphicsEndPDFContext();
What it exactly does is, drawing image with paper size and not it's original size. I want to draw image with original size on A4 size paper. Any help will be appreciated.
Kriti's suggestion worked for me. Below is working code:
UIGraphicsBeginPDFContextToData(pdfFile, CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height), nil);
NSString *strPath = [[[appDelegate getDocumentDirectory] stringByAppendingPathComponent:#"EPC"] stringByAppendingPathComponent:[NSString stringWithFormat:#"slide%i.png", i]];
NSData *imgData = [[NSData alloc] initWithContentsOfURL:[NSURL fileURLWithPath:strPath]];
image = [[UIImage alloc] initWithData:imgData];
rect = CGRectMake((paperSize.width - image.size.width)/2, (paperSize.height - image.size.height)/2 ,image.size.width ,image.size.height);
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height), nil);
[image drawInRect:rect];
UIGraphicsEndPDFContext();
I am trying to use image I/O to create thumbnails from a UIImage that I have created programatically. the problem is that the image that is returned is nil.
-( UIImage *) thumbnailFromImage: ( UIImage *)image
{
CGDataProviderRef dataProvider = CGImageGetDataProvider( image.CGImage );
CGImageSourceRef src = CGImageSourceCreateWithDataProvider( dataProvider, NULL );
NSDictionary* options = [NSDictionary dictionaryWithObjectsAndKeys:
(id)kCFBooleanTrue, (id)kCGImageSourceCreateThumbnailWithTransform,
(id)kCFBooleanTrue, (id)kCGImageSourceCreateThumbnailFromImageAlways,
(id)[NSNumber numberWithFloat:160.f], (id)kCGImageSourceThumbnailMaxPixelSize,
nil];
CGImageRef thumbnail = CGImageSourceCreateThumbnailAtIndex( src, 0, (__bridge CFDictionaryRef)(options) );
UIImage* smallImage = [UIImage imageWithCGImage:thumbnail scale:1 orientation:UIImageOrientationUp];
return smallImage;
}
Has anybody have any suggestions.
thanks
Reza
I want to add the signature on existing pdf. I have done this in following way:
1) Load existing pdf on UIView say mainView.
2) Add a signature image on mainView.
3) Call a following function
-(NSMutableData *)getPDFDatafromUIView
{
DebugLog(#"");
// Creates a mutable data object for updating with binary data, like a byte array
NSMutableData *pdfData = [NSMutableData data];
// Points the pdf converter to the mutable data object and to the UIView to be converted
UIGraphicsBeginPDFContextToData(pdfData, mainView.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();
// draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
mainView.layer renderInContext:pdfContext];
// remove PDF rendering context
UIGraphicsEndPDFContext();
return pdfData;
}
4) This function block your UI for a while, so call it on new thread
[NSThread detachNewThreadSelector:#selector(launchExportViewForExportDrawing) toTarget:self withObject:nil];
Using above method I get a pdf data with signature which contain the old pdf data too.
But for above method I must need to show the pdf in UIView. If I want do the above thing without loading on UIView, without showing pdf to user, How do I do that?
I am able to add a Image on pdf with creating the new pdf page. How do I add a image on existing pdf?
I have solved by creating the new PDF and drawing the pdf data and signature on it. Please refer following code:
// For adding the Siganture we need to wite the content on new PDF
-(void) addSignature:(UIImage *) imgSignature onPDFData:(NSData *)pdfData {
NSMutableData* outputPDFData = [[NSMutableData alloc] init];
CGDataConsumerRef dataConsumer = CGDataConsumerCreateWithCFData((CFMutableDataRef)outputPDFData);
CFMutableDictionaryRef attrDictionary = NULL;
attrDictionary = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(attrDictionary, kCGPDFContextTitle, CFSTR("My Doc"));
CGContextRef pdfContext = CGPDFContextCreate(dataConsumer, NULL, attrDictionary);
CFRelease(dataConsumer);
CFRelease(attrDictionary);
CGRect pageRect;
// Draw the old "pdfData" on pdfContext
CFDataRef myPDFData = (__bridge CFDataRef) pdfData;
CGDataProviderRef provider = CGDataProviderCreateWithCFData(myPDFData);
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(provider);
CGDataProviderRelease(provider);
CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);
pageRect = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
CGContextBeginPage(pdfContext, &pageRect);
CGContextDrawPDFPage(pdfContext, page);
// Draw the signature on pdfContext
pageRect = CGRectMake(0, 0,imgSignature.size.width , imgSignature.size.height);
CGImageRef pageImage = [imgSignature CGImage];
CGContextDrawImage(pdfContext, pageRect, pageImage);
// release the allocated memory
CGPDFContextEndPage(pdfContext);
CGPDFContextClose(pdfContext);
CGContextRelease(pdfContext);
// write new PDFData in "outPutPDF.pdf" file in document directory
NSString *docsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *pdfFilePath =[NSString stringWithFormat:#"%#/outPutPDF.pdf",docsDirectory];
[outputPDFData writeToFile:pdfFilePath atomically:YES];
}
Rohit Answer is working perfectly,But it works only single page so i just Added some code for all pages displaying with image(image shown in single page reaming pages are looks same).Thanks #Rohit
NSString *path = [[NSBundle mainBundle] pathForResource:#"PartB" ofType:#"pdf"];
NSURL *docURL = [NSURL fileURLWithPath:path];
NSString *pdfName = [NSString stringWithFormat:#"%#",docURL];
NSLog(#"pdfName: %#", pdfName);
NSData *pdfData = [NSData dataWithContentsOfFile:path];
NSURL *pdfURL = [[NSBundle mainBundle] URLForResource:#"PartB.pdf" withExtension:nil];
CGPDFDocumentRef pdf1 = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL);
long pageCount = CGPDFDocumentGetNumberOfPages(pdf1);
NSLog(#"the page count %ld",pageCount);
NSMutableData* outputPDFData = [[NSMutableData alloc] init];
CGDataConsumerRef dataConsumer = CGDataConsumerCreateWithCFData((CFMutableDataRef)outputPDFData);
CFMutableDictionaryRef attrDictionary = NULL;
attrDictionary = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(attrDictionary, kCGPDFContextTitle, CFSTR("My Doc"));
CGContextRef pdfContext = CGPDFContextCreate(dataConsumer, NULL, attrDictionary);
CFRelease(dataConsumer);
CFRelease(attrDictionary);
CGRect pageRect;
// Draw the old "pdfData" on pdfContext
CFDataRef myPDFData = (__bridge CFDataRef) pdfData;
CGDataProviderRef provider = CGDataProviderCreateWithCFData(myPDFData);
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(provider);
CGDataProviderRelease(provider);
for (int k=1; k<=pageCount; k++) {
CGPDFPageRef page3 = CGPDFDocumentGetPage(pdf, k);
pageRect = CGPDFPageGetBoxRect(page3, kCGPDFMediaBox);
CGContextBeginPage(pdfContext, &pageRect);
CGContextDrawPDFPage(pdfContext, page3);
if (k==pageSelect) {
pageRect = CGRectMake(0, 0,100 , 100);
CGImageRef pageImage = [mainImage.image CGImage];
CGContextDrawImage(pdfContext, pageRect, pageImage);
}
CGPDFContextEndPage(pdfContext);
}
CGPDFContextClose(pdfContext);
CGContextRelease(pdfContext);
// write new PDFData in "outPutPDF.pdf" file in document directory
NSString *docsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *pdfFilePath =[NSString stringWithFormat:#"%#/outPutPDF.pdf",docsDirectory];
[outputPDFData writeToFile:pdfFilePath atomically:YES];
NSLog(#"save the pdf %#",pdfFilePath);
I'm not sure I understand your problem completely. From what I can tell you have a UIView that you're rendering onto a PDF document, and you want to add a signature image and not show it to the user.
If you're trying to add a "signature image" to your pdf, you can add a UIImageView to the UIView that you're rendering to the pdf.
If you don't want the user to see the UIView in the mean time, you could change it's origin to somewhere off bounds, for example:
CGRect originalFrame = mainView.frame;
CGRect newFrame = mainView.frame;
newFrame.origin.x = -newFrame.size.width;
newFrame.origin.y = -newFrame.size.height;
mainView.frame = newFrame;
//do all your PDF stuff here
mainView.frame = originalFrame;
I hope that helps. If it doesn't, please clarify the problem :)
I have one image array and I am trying to create pdf with that images.how can i create multiple pages pdf file.
I checked one tutorial but its not working for me.
How to create a multiple page PDF in ios6?
Please help me
This works for me:
NSArray *pageArray = yourImageArray;
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, CGRectMake(0, 0, 595, 842), nil);
for (UIImage *theImage in pageArray) {
UIGraphicsBeginPDFPage();
NSData *jpegData = UIImageJPEGRepresentation(theImage, 0.5);
CGDataProviderRef dp = CGDataProviderCreateWithCFData((__bridge CFDataRef)jpegData);
CGImageRef cgImage = CGImageCreateWithJPEGDataProvider(dp, NULL, true, kCGRenderingIntentDefault);
[[UIImage imageWithCGImage:cgImage] drawInRect:CGRectMake(0, 0, theImage.size.width, theImage.size.height)];
}
UIGraphicsEndPDFContext();
return pdfData;
For starting each new page in the pdf, use
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageWidth, pageHeight), nil);
I'm using the OpenCV library in my app and I want to the use the final result as a UIImage.
I use this code to convert between IplImage to UIImage:
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
NSData * data = [[NSData alloc] initWithBytes:image->imageData length:image->imageSize];
CGDataProviderRef provider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
CGImageRef imageRef = CGImageCreate(image->width, image->height,
image->depth, image->depth * image->nChannels, image->widthStep,
colorSpace, kCGImageAlphaPremultipliedLast|kCGBitmapByteOrderDefault,
provider, NULL, false, kCGRenderingIntentDefault);
UIImage *ret = [[UIImage alloc] initWithCGImage:imageRef];
CGImageRelease(imageRef);
CGDataProviderRelease(provider);
CGColorSpaceRelease(colorSpace);
My problem is that after the conversion the quality of the original image decreases and the image is kind of blurry.
What is wrong with my code?