Create PDF from UIScrollView Objective C

Question

this question has been posted before (Creating PDF from UIScrollView in iphone app) and the code I am using is from here.

Here is the code

-(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
{
    // 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, aView.bounds, nil);
    UIGraphicsBeginPDFPage();
    CGContextRef pdfContext = UIGraphicsGetCurrentContext();


    // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData

    [aView.layer renderInContext:pdfContext];

    // remove PDF rendering context
    UIGraphicsEndPDFContext();

    // Retrieves the document directories from the iOS device
    NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);

    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];

    // instructs the mutable data object to write its context to a file on disk
    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
}

Setup: I have a UIScrollView, inside is a UIView. I want to save the entire UIView (950,500px) and it's in a space (the UIScrollView size) of (520,500). The PDF being generated is only the size of UIScrollView (520,500)

I read the answer but he apparently changed the code but it doesn't work for me. I've been trying to fix this all day.

I'm a beginner so please indicate anything I should add to my question that I missed. Thank you.

PS - this is an iPad app.

Is the first argument of `createPDFfromUIView:` the `UIView` inside or the `UIScrollView` ? I think it should be the `UIView` if that's not already the case. — Taum, Feb 04 '14 at 19:59

score 5 · Answer 1 · answered Feb 04 '14 at 20:04

5

The context should have the size of the scrollview's content size, not the bounds.

Then you need to temporarily resize the scrollview to its content size, render it in the PDF context, and restore the size of the scrollview to its original size.

UIGraphicsBeginPDFContextToData(pdfData, (CGRect){0,0, scrollView.contentSize}, nil);

CGRect origSize = scrollView.frame;
CGRect newSize = origSize;
newSize.size = scrollView.contentSize;
[scrollView setFrame:newSize];

[scrollView.layer renderInContext:pdfContext];

[scrollView setFrame:origSize];

answered Feb 04 '14 at 20:04

Léo Natan

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I tried this, it makes the PDF the correct size, but stretches out the original picture. – uti0mnia Feb 04 '14 at 20:18
@KChockey Stretch how? Did you resize the scrollview correctly? – Léo Natan Feb 04 '14 at 20:19
could you edit my code? I think it's because of the order of the lines of code – uti0mnia Feb 04 '14 at 20:23
By stretching, i mean it's taking only part of the UIView (roughly 600 pixels - bigger than the UIScrollView, which is a good start) but stretches that 600px into 950px – uti0mnia Feb 05 '14 at 12:53

score 2 · Answer 2 · edited Jun 20 '20 at 09:12

2

Check ScrollViewToPDF example and you will understand what you need to do.

It uses same scrollview's layer renderInContext but here PDF is created according to your requirement such as one page PDF or multiple page PDF

Note : It captures all visible as well as invisible part of scrollView

edited Jun 20 '20 at 09:12

Community

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answered Oct 27 '14 at 14:56

Paresh Navadiya

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@Popeye : was improving my answer and got your message but still appreciate your concern. – Paresh Navadiya Oct 27 '14 at 15:04

uti0mnia · Accepted Answer · 2014-02-13T13:29:30.053

1

If anyone was wondering, I found how to fix this.

Since my UIView is IN a UIScrollView, and I use another class for the UIView, when I call the method and chose the parameter aView, I just put in self.

So in my UIView class, when I want the PDF to be generated I type in

[self createPDFfromUIView:self saveToDocumentsWithFileName:UIViewPDF];

edited Feb 13 '14 at 13:29

answered Feb 12 '14 at 12:47

uti0mnia

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Create PDF from UIScrollView Objective C

3 Answers3

Note : It captures all visible as well as invisible part of scrollView

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