I am having memory leak in while creating pdf from loaded webView. Piece of code for creating PDF via UIWebView is written below:
- (NSData *)pdfDataForWebView:(UIWebView *)webView {
UIViewPrintFormatter *formatter = webView.viewPrintFormatter;
formatter.startPage = 0;
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:formatter startingAtPageAtIndex:0];
CGRect page;
page.origin.x = 0;
page.origin.y = 0;
page.size.width = 612;//792;
page.size.height = 792;//612;
CGRect printable = CGRectInset(page, 30, 30);
[render setValue:[NSValue valueWithCGRect:page] forKey:#"paperRect"];
[render setValue:[NSValue valueWithCGRect:printable] forKey:#"printableRect"];
NSMutableData * pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, page, nil);
for (NSInteger i=0; i < [render numberOfPages]; i++) {
UIGraphicsBeginPDFPage();
CGRect bounds = UIGraphicsGetPDFContextBounds();
[render drawPageAtIndex:i inRect:bounds]; //***--Memory-Leak-***
}
UIGraphicsEndPDFContext();
NSString *pdfFile = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/mcsweb.pdf"];
[pdfData writeToFile:pdfFile atomically:YES];
NSLog(#"pdf file %#", pdfFile);
return pdfData;
}
I have found leak via leak instrument but don't know how to resolve it. While using break point break point stuck with that particular line for 10 to 20 times for pdf of just 2 pages, then executes rest code.
Related
i want to save pdf to ibook from UIWebView in the app, the html in UIWebView can be multi page.
i try using
NSString *page = [self.lowWebview stringByEvaluatingJavaScriptFromString:#"document.body.outerHTML"];
NSString *path = [self exportHTMLContentToPDF:page];
NSURL *targetURL = [NSURL fileURLWithPath:path];
self.docController = [UIDocumentInteractionController interactionControllerWithURL:targetURL];
if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:#"itms-books:"]])
{
[self.docController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];
NSLog(#"iBooks installed");
} else {
NSLog(#"iBooks not installed");
}
exportHTMLContentToPDF:
CustomPrintPageRenderer *printPageRenderer = [[CustomPrintPageRenderer alloc] init];
UIMarkupTextPrintFormatter *printFormatter = [[UIMarkupTextPrintFormatter alloc] initWithMarkupText:HTMLContent];
[printPageRenderer addPrintFormatter:printFormatter startingAtPageAtIndex:0];//.addPrintFormatter(printFormatter, startingAtPageAtIndex: 0)
NSData *pdfData = [self drawPDFUsingPrintPageRenderer:printPageRenderer];
NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *fileName = [docDirPath stringByAppendingPathComponent:#"ticket.pdf"];
[pdfData writeToFile:fileName atomically:true];//.writeToFile(fileName, atomically: true)
NSLog(#"%#", fileName);
return fileName;
the problem is exportHTMLContentToPDF create just one page if UIWebView contain multiple page, and some time the output format is not well print in pdf
thanks in advance.
Create PDF from any Microsoft Document loaded in UIWebview
#define kPaperSizeA4 CGSizeMake(595.2,841.8)
First of all implement UIPrintPageRenderer protocol
#interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
#end
#implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < self.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
#end
Then, call below method after document finished loading in UIWebView
-(void)createPDF:(UIWebView *)webView {
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:webView.viewPrintFormatter startingAtPageAtIndex:0];
float padding = 10.0f;
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
CGRect printableRect = CGRectMake(padding, padding, kPaperSizeA4.width-(padding * 2), kPaperSizeA4.height-(padding * 2));
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:#"paperRect"];
[render setValue:[NSValue valueWithCGRect:printableRect] forKey:#"printableRect"];
NSData *pdfData = [render printToPDF];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if (pdfData) {
[pdfData writeToFile:directoryPath atomically: YES];
}
else
{
NSLog(#"PDF couldnot be created");
}
});}
Excerpted from PDF Creation in iOS - Create PDF from any Microsoft Document loaded in UIWebview. The original author was Mansi Panchal. Attribution details can be found on the contributor page. The source is licenced under CC BY-SA 3.0 and may be found in the Documentation archive. Reference topic ID: 2416 and example ID: 28437.
#define kPaperSizeA4 CGSizeMake(595.2,841.8)
First of all implement UIPrintPageRenderer protocol
#interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
#end
#implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < self.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
#end
Then, call below method after document finished loading in UIWebView
-(void)createPDF:(UIWebView *)webView {
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:webView.viewPrintFormatter startingAtPageAtIndex:0];
float padding = 10.0f;
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
CGRect printableRect = CGRectMake(padding, padding, kPaperSizeA4.width-(padding * 2), kPaperSizeA4.height-(padding * 2));
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:#"paperRect"];
[render setValue:[NSValue valueWithCGRect:printableRect] forKey:#"printableRect"];
NSData *pdfData = [render printToPDF];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if (pdfData) {
[pdfData writeToFile:directoryPath atomically: YES];
}
else
{
NSLog(#"PDF couldnot be created");
} });}
Ref: https://medium.com/#javedmultani16/create-pdf-from-any-microsoft-document-loaded-in-uiwebview-in-ios-15229671060b
This may help with quality and multi-page issues :
https://coderwall.com/p/gssuka/rendering-html-pdf-report-for-printing-from-uiwebview
I have a website's URL and want to save its content as MHT file, if not possible then can be as a PDF file. I found a library which is not free ( for 1 year $289)
http://www.chilkatsoft.com/mht-features.asp
I know that safari doesnt support MHT file then it seems impossible.. Safari suppors webarcive format but our server doesnt support it. Then for me there are just 2 options for saving webcontent as mht or pdf.
I found an obj-C code to save webcontent as an image..
ios save web page as pdf
but i dont want to use this way (save it as an image->convert it as a pdf)
For creating MHT from website like this:
NSString *googleString = #"http://www.google.com";
NSURL *googleURL = [NSURL URLWithString:googleString];
NSError *error;
NSString *googlePage = [NSString stringWithContentsOfURL:googleURL
encoding:NSASCIIStringEncoding
error:&error];
NSData *data = [googlePage dataUsingEncoding:NSASCIIStringEncoding];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
documentsPath = [documentsPath stringByAppendingPathComponent:#"test.mht"];
BOOL isSucess = [data writeToFile:documentsPath atomically:YES];
if (isSucess)
NSLog(#"written");
else
NSLog(#"not written");
Create PDF from website after loading UIWebView like this :
Use UIPrintPageRenderer from UIWebView Follow below steps :
Add Category of UIPrintPageRenderer for getting PDF Data
#interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
#end
#implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < self.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
#end
Add these define for A4 size
#define kPaperSizeA4 CGSizeMake(595.2,841.8)
Now in UIWebView's webViewDidFinishLoad delegate use UIPrintPageRenderer property of UIWebView.
- (void)webViewDidFinishLoad:(UIWebView *)awebView
{
if (awebView.isLoading)
return;
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:awebView.viewPrintFormatter startingAtPageAtIndex:0];
//increase these values according to your requirement
float topPadding = 10.0f;
float bottomPadding = 10.0f;
float leftPadding = 10.0f;
float rightPadding = 10.0f;
CGRect printableRect = CGRectMake(leftPadding,
topPadding,
kPaperSizeA4.width-leftPadding-rightPadding,
kPaperSizeA4.height-topPadding-bottomPadding);
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:#"paperRect"];
[render setValue:[NSValue valueWithCGRect:printableRect] forKey:#"printableRect"];
NSData *pdfData = [render printToPDF];
if (pdfData) {
[pdfData writeToFile:[NSString stringWithFormat:#"%#/tmp.pdf",NSTemporaryDirectory()] atomically: YES];
}
else
{
NSLog(#"PDF couldnot be created");
}
}
I used web view to load pdf also added an image as subview to my pdfView.
To save the final PDF with subviews,i tried the approach given in the below stack question, it meets the objective but it completely lost quality of the PDF
How to Convert UIView to PDF within iOS?
Now i am try with the below approach,
-(void)savePDFFromWebView:(UIWebView*)webView fileName:(NSString*)_fileName
{
int height, width, header, sidespace;
height = webView.scrollView.contentSize.height;
width = webView.scrollView.contentSize.width;
header = 15;
sidespace = 30;
// set header and footer spaces
UIEdgeInsets pageMargins = UIEdgeInsetsMake(header, sidespace, header, sidespace);
webView.viewPrintFormatter.contentInsets = pageMargins;
UIPrintPageRenderer *renderer = [[UIPrintPageRenderer alloc] init];
[renderer addPrintFormatter:webView.viewPrintFormatter startingAtPageAtIndex:0];
CGSize pageSize = CGSizeMake(width, height);
CGRect printableRect = CGRectMake(pageMargins.left,
pageMargins.top,
pageSize.width - pageMargins.left - pageMargins.right,
pageSize.height - pageMargins.top - pageMargins.bottom);
CGRect paperRect = CGRectMake(0, 0, pageSize.width, pageSize.height);
[renderer setValue:[NSValue valueWithCGRect:paperRect] forKey:#"paperRect"];
[renderer setValue:[NSValue valueWithCGRect:printableRect]
forKey:#"printableRect"];
NSData *pdfData = [self printToPDFWithRenderer:renderer paperRect:paperRect];
// save PDF file
NSString *saveFileName = [NSString stringWithFormat:#"%#%dx%d.pdf",
_fileName, (int)pageSize.width, (int)pageSize.height];
NSString *savePath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)
objectAtIndex:0] stringByAppendingPathComponent:saveFileName];
[pdfData writeToFile: savePath atomically: YES];
}
-(NSData*) printToPDFWithRenderer:(UIPrintPageRenderer*)renderer paperRect:(CGRect)paperRect
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, paperRect, nil );
[renderer prepareForDrawingPages: NSMakeRange(0, renderer.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < renderer.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[renderer drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
Here the webView which pass as an input for UIPrintPageRenderer includes the
subviews but the final pdf does not includes subviews.
How to include subviews to save the final PDF?
Note : UIWebView to PDF working for me.
Now UIView to PDF is also option but wanted to work with below code as same as used to create PDF in UIWebView.
I have done below code so far for UIView's viewPrintFormatter to be able create PDF:
Added Category of UIPrintPageRenderer for getting PDF Data
#interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
#end
#implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < self.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
#end
Add these define for A4 size
#define kPaperSizeA4 CGSizeMake(595.2,841.8)
Create PDF
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:self.view.viewPrintFormatter startingAtPageAtIndex:0];
//increase these values according to your requirement
float topPadding = 10.0f;
float bottomPadding = 10.0f;
float leftPadding = 10.0f;
float rightPadding = 10.0f;
CGRect printableRect = CGRectMake(leftPadding,
topPadding,
kPaperSizeA4.width-leftPadding-rightPadding,
kPaperSizeA4.height-topPadding-bottomPadding);
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:#"paperRect"];
[render setValue:[NSValue valueWithCGRect:printableRect] forKey:#"printableRect"];
NSData *pdfData = [render printToPDF];
if (pdfData) {
[pdfData writeToFile:[NSString stringWithFormat:#"%#/tmp.pdf",NSTemporaryDirectory()] atomically: YES];
}
else
{
NSLog(#"PDF couldnot be created");
}
I am creating an iPad application, in that i have to use different PDF forms. I got some methods to generate PDF files through code using Quartz2D. But I have to write entire forms through code. I may have to update the PDF forms in future, so again I have to write the code. So I heard that there is a component called iTextSharp for .net pdf creation - is there something similar for iOS? So that I can use some XML templates to create the PDF files.
Please help, thanks
I do this in my app using the iOS print subsystem and the UIMarkupTextPrintFormatter. The trick is to write your own custom UIPrintPageRenderer that overrides and returns correct values from paperRect and numberOfPages. You'll add your UIMarkupTextPrintFormatter(s) to your custom UIPrintPageRenderer.
Then, you'll need routines similar to this, in the context of your custom UIPrintPageRenderer:
- (CGRect) paperRect
{
if (!_generatingPdf)
return [super paperRect];
return UIGraphicsGetPDFContextBounds();
}
- (CGRect) printableRect
{
if (!_generatingPdf)
return [super printableRect];
return CGRectInset( self.paperRect, 20, 20 );
}
- (NSData*) printToPDF
{
_generatingPdf = YES;
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, CGRectMake(0, 0, 792, 612), nil ); // letter-size, landscape
[self prepareForDrawingPages: NSMakeRange(0, 1)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < self.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
_generatingPdf = NO;
// NSString* filename = #"/Volumes/Macintosh HD 2/test.pdf";
// [pdfData writeToFile: filename atomically: YES];
return pdfData;
}
#TomSwift : agree with his answer but i would like to explain in better way
To be able create PDF from UIWebView is load HTML to yourWebView or there might be case yourWebView can also be hidden to generate PDF but process remains the same
1) Added Category of UIPrintPageRenderer for getting PDF Data as yourWebView.viewPrintFormatter need to be used
#interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
#end
#implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for ( int i = 0 ; i < self.numberOfPages ; i++ )
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
#end
2) Add these define for A4 size or any custom size you want
#define kPaperSizeA4 CGSizeMake(595.2,841.8)
3) Process how we can create PDF
//create print renderer
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:yourWebView.viewPrintFormatter startingAtPageAtIndex:0];
//provide padding ---- increase these values according to your requirement
float topPadding = 10.0f;
float bottomPadding = 10.0f;
float leftPadding = 10.0f;
float rightPadding = 10.0f;
//provide rect for printing and for actual PDF Rect of page
CGRect printableRect = CGRectMake(leftPadding,
topPadding,
kPaperSizeA4.width-leftPadding-rightPadding,
kPaperSizeA4.height-topPadding-bottomPadding);
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:#"paperRect"];
[render setValue:[NSValue valueWithCGRect:printableRect] forKey:#"printableRect"];
//category created above is used here
NSData *pdfData = [render printToPDF];
//Save PDF to directory for usage
if (pdfData) {
[pdfData writeToFile:[NSString stringWithFormat:#"%#/tmp.pdf",NSTemporaryDirectory()] atomically: YES];
}
else
{
NSLog(#"PDF couldnot be created");
}