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Creating a multi-page PDF file in objective-c

I am trying to create a multi-page PDF file. I followed this tutorial . This works with the XIB file for static text, and then adds the table from the code. But the problem with the ATM is that when the table is more than one page. When a table has more than 9 rows. It should be continued on the next page.

This is what I do in code.

+(void)drawPDF:(NSString*)fileName { NSMutableDictionary *mutDictValues = [[[NSUserDefaults standardUserDefaults] objectForKey:@"dicValues"] mutableCopy]; NSMutableArray *arrSelectedCities = [[mutDictValues objectForKey:@"cities"]mutableCopy ]; if(arrSelectedCities.count <= 8){ // If there are only 8 rows --> we can fit everyting on one page ! // Create the PDF context using the default page size of 612 x 792. UIGraphicsBeginPDFContextToFile(fileName, CGRectZero, nil); // Mark the beginning of a new page. UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil); [self drawLabels]; [self drawLogo]; int xOrigin = 50; int yOrigin = 350; int rowHeight = 50; int columnWidth = 240; int numberOfRows = 9; int numberOfColumns = 2; [self drawTableAt:CGPointMake(xOrigin, yOrigin) withRowHeight:rowHeight andColumnWidth:columnWidth andRowCount:numberOfRows andColumnCount:numberOfColumns]; [self drawTableDataAt:CGPointMake(xOrigin, yOrigin) withRowHeight:rowHeight andColumnWidth:columnWidth andRowCount:numberOfRows andColumnCount:numberOfColumns withArray:arrSelectedCities]; // Close the PDF context and write the contents out. UIGraphicsEndPDFContext(); }else{ // When we have more then 8 rows we should have 2 pages. NSLog(@"Create 2 pages"); // Create the PDF context using the default page size of 612 x 792. UIGraphicsBeginPDFContextToFile(fileName, CGRectZero, nil); // Mark the beginning of a new page. UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil); [self drawLabels]; [self drawLogo]; int xOrigin = 50; int yOrigin = 350; int rowHeight = 50; int columnWidth = 240; int numberOfRows = 9; int numberOfColumns = 2; [self drawTableAt:CGPointMake(xOrigin, yOrigin) withRowHeight:rowHeight andColumnWidth:columnWidth andRowCount:numberOfRows andColumnCount:numberOfColumns]; [self drawTableDataAt:CGPointMake(xOrigin, yOrigin) withRowHeight:rowHeight andColumnWidth:columnWidth andRowCount:numberOfRows andColumnCount:numberOfColumns withArray:arrSelectedCities]; // Create the PDF context using the default page size of 612 x 792. UIGraphicsBeginPDFContextToFile(fileName, CGRectZero, nil); // Mark the beginning of a new page. UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil); int xOrigin2 = 50; int yOrigin2 = 60; int numberOfRows2 = ((arrSelectedCities.count+1)-9); [self drawTableAt:CGPointMake(xOrigin2, yOrigin2) withRowHeight:rowHeight andColumnWidth:columnWidth andRowCount:numberOfRows2 andColumnCount:numberOfColumns]; [self drawTableDataAt:CGPointMake(xOrigin2, yOrigin2) withRowHeight:rowHeight andColumnWidth:columnWidth andRowCount:numberOfRows2 andColumnCount:numberOfColumns withArray:arrSelectedCities]; } // Close the PDF context and write the contents out. UIGraphicsEndPDFContext(); }

Let me explain what I'm doing here. I have an array that should populate my tableview. If the array is larger than 8, then I should use 2 pages. Otherwise, everything works with one page.

What does this mean, it creates only the second page ....

Can someone help me?

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4 answers

You should not call UIGraphicsBeginPDFContextToFile() again when creating the second page, only UIGraphicsBeginPDFPageWithInfo() :

 UIGraphicsBeginPDFContextToFile(...); UIGraphicsBeginPDFPageWithInfo(...); // start first page // ... UIGraphicsBeginPDFPageWithInfo(...); // start second page // ... UIGraphicsEndPDFContext();
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 NSArray *imageArray = [NSArray arrayWithObjects:[UIImage imageNamed:@"3.png"], [UIImage imageNamed:@"4.png"], [UIImage imageNamed:@"5.png"], [UIImage imageNamed:@"3.png"], nil]; NSMutableData *pdfFile = [[NSMutableData alloc] init]; double pageWidth = 0.0; double pageHeight = 0.0; UIImage *image; for (int i = 0; i < [imageArray count]; i++) { image =[UIImage imageWithCGImage:[imageArray[i] CGImage]]; pageWidth = pageWidth + image.size.width ; pageHeight = pageHeight + image.size.height; } image =[UIImage imageWithCGImage:[imageArray[0] CGImage]]; CGRect rect; rect = CGRectMake(0, 0,image.size.width ,image.size.height); UIGraphicsBeginPDFContextToData(pdfFile, CGRectZero, nil); for (int i = 0; i < [imageArray count] ; i++) { UIGraphicsBeginPDFPageWithInfo(rect, nil); UIImage *contextImage = imageArray[i]; [contextImage drawInRect:rect]; } UIGraphicsEndPDFContext(); // save PDF file NSString *saveFileName = [NSString stringWithFormat:@"%@%fx%f.pdf", @"test", pageWidth, pageHeight]; NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES); NSString* documentDirectory = [documentDirectories objectAtIndex:0]; NSString* savePath = [documentDirectory stringByAppendingPathComponent:saveFileName]; if([[NSFileManager defaultManager] fileExistsAtPath:savePath]) { [[NSFileManager defaultManager] removeItemAtPath:savePath error:nil]; } [pdfFile writeToFile: savePath atomically: YES]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"PDF File created and saved successfully." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil]; [alert show];
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You do not need to create a context for the second page ( UIGraphicsBeginPDFContextToFile(fileName, CGRectZero, nil) ), you only need to create this page. You should also remember to close the open page with CGPDFContextEndPage() .

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 - (void)viewDidLoad { [super viewDidLoad]; [self createPDF]; } - (void)createPDF { [self setupPDFDocumentNamed:@"myPdf" Width:850 Height:1100]; [self beginPDFPage]; } - (void)beginPDFPage { UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil); // kPadding will make 20 points margin on both sides of pdf CGRect textRect = [self addText:@"Line Text Testing" withFrame:CGRectMake(PdfPadding, PdfPadding, 400, 200) fontSize:48.0f]; textRect = [self addLineWithFrame:CGRectMake(PdfPadding, textRect.origin.y + textRect.size.height +PdfPadding, pageSize.width - PdfPadding*2, 4) withColor:[UIColor blueColor]]; UIImage *anImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"https://www.phantompeer.com/sitefiles/osx.png"]]]; textRect = [self addImage:anImage atPoint:CGPointMake((pageSize.width/2)-(anImage.size.width/2),textRect.origin.y + textRect.size.height + PdfPadding)]; textRect = [self addLineWithFrame:CGRectMake(PdfPadding, textRect.origin.y + textRect.size.height + PdfPadding, pageSize.width - PdfPadding*2, 4) withColor:[UIColor redColor]]; textRect = [self addText:@"Line Text Testing" withFrame:CGRectMake(PdfPadding, textRect.origin.y + textRect.size.height + PdfPadding, 400, 200) fontSize:48.0f]; textRect = [self addLineWithFrame:CGRectMake(PdfPadding, textRect.origin.y + textRect.size.height +PdfPadding, pageSize.width - PdfPadding*2, 4) withColor:[UIColor blueColor]]; anImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"https://www.w3schools.com/css/img_fjords.jpg"]]]; textRect = [self addImage:anImage atPoint:CGPointMake((pageSize.width/2)-(anImage.size.width/2),textRect.origin.y + textRect.size.height + PdfPadding)]; textRect = [self addLineWithFrame:CGRectMake(PdfPadding, textRect.origin.y + textRect.size.height + PdfPadding, pageSize.width - PdfPadding*2, 4) withColor:[UIColor redColor]]; UIGraphicsEndPDFContext(); [self loadRemotePdf]; } -(CGRect)addText:(NSString*)text withFrame:(CGRect)frame fontSize:(float)fontSize { UIFont *font = [UIFont systemFontOfSize:fontSize]; CGSize stringSize = [text sizeWithFont:font constrainedToSize:CGSizeMake(pageSize.width - 2*20-2*20, pageSize.height - 2*20 - 2*20) lineBreakMode:UILineBreakModeWordWrap]; if((frame.origin.y + stringSize.height + PdfPadding) > pageSize.height) { frame = CGRectMake(frame.origin.x, PdfPadding, frame.size.width, frame.size.height); UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil); } float textWidth = frame.size.width; if (textWidth < stringSize.width) textWidth = stringSize.width; if (textWidth > pageSize.width) textWidth = pageSize.width - frame.origin.x; CGRect renderingRect = CGRectMake(frame.origin.x, frame.origin.y, textWidth, stringSize.height); [text drawInRect:renderingRect withFont:font lineBreakMode:NSLineBreakByWordWrapping alignment:NSTextAlignmentLeft]; frame = CGRectMake(frame.origin.x, frame.origin.y, textWidth, stringSize.height); return frame; } -(CGRect)addLineWithFrame:(CGRect)frame withColor:(UIColor*)color { if((frame.origin.y + frame.size.height+PdfPadding) > pageSize.height) { frame = CGRectMake(frame.origin.x, PdfPadding, frame.size.width, frame.size.height); UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil); } CGContextRef currentContext = UIGraphicsGetCurrentContext(); CGContextSetStrokeColorWithColor(currentContext, color.CGColor); // this is the thickness of the line CGContextSetLineWidth(currentContext, frame.size.height); CGPoint startPoint = frame.origin; CGPoint endPoint = CGPointMake(frame.origin.x + frame.size.width, frame.origin.y); CGContextBeginPath(currentContext); CGContextMoveToPoint(currentContext, startPoint.x, startPoint.y); CGContextAddLineToPoint(currentContext, endPoint.x, endPoint.y); CGContextClosePath(currentContext); CGContextDrawPath(currentContext, kCGPathFillStroke); return frame; } -(CGRect)addImage:(UIImage*)image atPoint:(CGPoint)point { CGRect imageFrame = CGRectMake(point.x, point.y, image.size.width, image.size.height); if((imageFrame.origin.y + imageFrame.size.height + PdfPadding) > pageSize.height) { imageFrame = CGRectMake(imageFrame.origin.x, PdfPadding, imageFrame.size.width, imageFrame.size.height); UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil); } [image drawInRect:imageFrame]; return imageFrame; } - (void) loadRemotePdf { CGRect rect = [[UIScreen mainScreen] bounds]; CGSize screenSize = rect.size; NSString *newPDFName = [NSString stringWithFormat:@"myPdf.pdf"]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *pdfPath = [documentsDirectory stringByAppendingPathComponent:newPDFName]; UIWebView *myWebView = [[UIWebView alloc] initWithFrame:CGRectMake(0,0,screenSize.width,screenSize.height)]; myWebView.autoresizesSubviews = YES; myWebView.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth); NSURL *myUrl = [NSURL fileURLWithPath:pdfPath]; NSURLRequest *myRequest = [NSURLRequest requestWithURL:myUrl]; [myWebView loadRequest:myRequest]; [self.view addSubview: myWebView]; }

To create a new page in pdf use

 UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil);
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Source: https://habr.com/ru/post/944420/

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