问题
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/
回答1:
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/
回答2:
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 :)
回答3:
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);
}
回答4:
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
回答5:
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..
来源：https://stackoverflow.com/questions/27839778/issues-in-generating-pdf-from-uiwebview-in-objective-c