In my app for iOS i need to create a pdf document from my webview content. I watched these posts: Creating PDF file from UIWebView and https://coderchrismills.wordpress.com/2011/06/25/making-a-pdf-from-a-uiwebview/
I wonder if there is a simpler way to do it. For example for my project for Mac i use this:
NSData *pdf = [[[[webView mainFrame] frameView] documentView] dataWithPDFInsideRect:[[[webView mainFrame] frameView] documentView].frame];
PDFDocument *doc = [[PDFDocument alloc] initWithData:pdf];
Is there any simple way to do this in iOS?
Which is the best option to obtain best quality pdf document from a webview content?
There isn't a method that allows this directly via the SDK like there is on Mac however you may wish to take a look at BNHtmlPdfKit which allows you to save the contents of URLs, web views and also html strings as PDFs.
For example, as follows:
self.htmlPdfKit = [BNHtmlPdfKit saveUrlAsPdf:[NSURL URLWithString:#"http://itsbrent.net"] toFile:#"...itsbrent.pdf" pageSize:BNPageSizeA6 success:^(NSString *pdfFileName) {
NSLog(#"Done");
} failure:^(NSError *err) {
NSLog(#"Failure");
}];
It makes use of a custom UIPrintPageRenderer which overrides paperRect and printableRect thus causing the UIPrintFormatter to return a pageCount as well as render the document.
I found good answer by AnderCover at
"Creating PDF file from UIWebView"
also it's not using any third party api. To create pdf from webview.
Hope it help's you.
Related
I have loaded an editable pdf in iOS. But not able to figure out if user have done any changes to that pdf.
NSData *fileData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"PdfFormExample" ofType:#"pdf"]];
PDFDocument *pdfDocument = [[PDFDocument alloc] initWithData:fileData];
PDFView *pdfView = [[PDFView alloc] initWithFrame:self.view.frame];
pdfView.document = pdfDocument
[self.view addSubView:pdfView];
Thanks in Advance.
You can use PDFKit for controlling and loading the pdf into iOS app. Its provided by the apple. In that you have to first setup delegate for the PDFs
PDFDocumentDelegate
PDFKit can send the notifications for different operations such as begin writing, end writing, etc. So you can use these methods to get local notification get determine that whether the user started writing or modifying the PDF. For that you can use,
PDFDocumentDidBeginPageWriteNotification
PDFDocumentDidEndPageWriteNotification
any of the above according to when you wanna make changes.
If you want more reference to this here is the link:
PDFKit / PDF Document
I'm trying to display signed pdf in an iOS applications.
While displaying a PDF is easy (plenty of libraries, UIDocumentInteractionController, etc.), I can't seem to find how to display the signatures in the PDF.
By signature, I mean what is in this sample: http://blogs.adobe.com/security/SampleSignedPDFDocument.pdf
I've seen it done in an iOS application, but I've no idea how to do it myself. I tried poking around with CGContextDrawPDFPage, without much success.
Any hint?
The signature you saw in the PDF file is the appearance of the signature field widget. The field widget is a specific PDF annotation.
The problem with the default PDF rendering engine in iOS (used by UIDocumentInteractionController, QuickLook framework, etc) is that it does not display the annotations on the PDF page, it displays only the main page content.
The only solution is to use a 3rd party PDF rendering engine, such as MuPDF, Foxit, PDFTron, etc.
Are you converting HTML to PDF?
If yes then it may be helpful :)
UIGraphicsBeginImageContext(imgapplicationSignature.bounds.size);
[imgapplicationSignature.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image1 = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self saveImage:image1 :#"imgapplicationSignature.png"];
NSString *documentsDirectory1 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES)[0];
[wbView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:#"var imageElement = document.getElementById('img_01'); imageElement.setAttribute('src', '%#');", [NSString stringWithFormat:#"file://%#/imgapplicationSignature.png", documentsDirectory1]]];
When I try to load a shared item, the data that comes back is dropbox's login page - as if I weren't authenticated.
Here is the current method I am using to get the file data:
[itemProvider loadItemForTypeIdentifier:docType options:nil completionHandler:^(NSURL *url, NSError *error) {
//my code
}];
doctype is an appropriate kUTType like kUTTypeImage or kUTTypeText, for example. The mimeType that we write the file with is correct to, per other files. It's the actual content loaded from dropbox (just a login page every time).
I have used other variations of the method (UIImage *, and NSData *) but get the same result for dropbox files.
Our shared extension works fine with files that are downloaded in apps like goodreader or Files. The problem arises when I try to share a file from the dropbox app. It gives me a url that I can put into any browser and it will take me to the file, so the url is not the problem.
Has anyone else faced this?
Here is an example link to a document that does this:
https://www.dropbox.com/s/qxkd1957qf7iq9x/04%20-%20Test%20Document.doc?dl=0
Thank you for your help on this Greg. I found that this worked instead by just changing the url and setting dl=1 like so
From:
https://www.dropbox.com/s/qxkd1957qf7iq9x/04%20-%20Test%20Document.doc?dl=0
To https://www.dropbox.com/s/qxkd1957qf7iq9x/04%20-%20Test%20Document.doc?dl=1
I want to make the following webpage using CocoaHTTPServer: there should be a link to download a file, but the source file must be NSData object in memory.
As far as I see in samples, there is an easy way to link some file on iPhone to the hyperlink. Is it possible to "link" NSData?
Would be very thankful for examples.
All you need to do is to return HTTPDataResponse in your HTTPConnection subclass.
If you want an example have a look at the CocoaHTTPServer sample called DynamicServer and replace - httpResponseForMethod: URI: in MyHTTPConnection with something similar to the following:
- (NSObject<HTTPResponse> *)httpResponseForMethod:(NSString *)method URI:(NSString *)path
{
// Before returning you can analyze the passed path argument and select the correct data object to return...
return [[HTTPDataResponse alloc] initWithData:placeYourDataInstanceHere];
}
After googling around and searching SO for a while, I stil couldn't find an answer -
I've wondered, How could I transfer data between two of my apps using custom URL handlers? Specifically images or an NSData object for that matter.
I know about being able to open specific parts of my app using custom handlers such as myapp1://start , myapp2://start , but I'm not sure how to go on transferring large amounts of data (~80k) through these handlers.
Would love to hear any creative solutions :)
p.s. The solution should be iOS >= 4.3 Compatible
Use the custom URL handlers in combination with UIPasteboard. Save something from your first app (say, an image) to the general pasteboard, like so:
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
[[UIPasteboard generalPasteboard] setImage:myImage];
Then use the custom URL schemes to switch apps.
Then retrieve your image from within the new app when you need it:
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
UIImage *tempImg = pasteboard.image;
Battle-tested. ; )
One Solution could be:
Implement a Webserver
Open up your second app via the custom url scheme with the IP-adress and the port of your custom web server included in the url
Add the route or parameters to your image also to your URL
Download and enjoy your photo :-)
Another Solution:
Start a Bonjour service
in a network the second app can find this service
do some magic to pass the data in between the apps
EDIT:
BETTER OTHER SOLUTION:
Just found another, but much more efficient way to do exchanges of larger data sets:
It is called UIPasteboard
Best reference for that:
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIPasteboard_Class/Reference.html
And another resource:
http://kmithi.blogspot.in/2012/03/sharing-data-among-ios-applications.html
That should do it.
For a webserver: There are tons of implementations found using Google
[http://www.codeproject.com/Articles/43447/How-to-Use-UIPasteBoard-to-Implement-Custom-Copy-a][1]
As you know many of the controls in UIKit now come pre-loaded with the ability to copy and paste text. You can also use this new ability in your own apps to copy and paste other things including: images, SQLite databases, text or any file. This is a great way to share data between your apps if you want to provide users with a suite of apps with integrated functionality.
CopyFrom Source Code
-(IBAction)copyImageToPasteBoard{
UIPasteboard *appPasteBoard = [UIPasteboard pasteboardWithName:#"CopyFrom"
create:YES];
appPasteBoard.persistent = YES;
NSData *data = UIImagePNGRepresentation([UIImage imageNamed:#"Old-Time-Photo.jpg"]);
[appPasteBoard setData:data forPasteboardType:#"com.appshop.copyfrom.imagedata"];
}
-(IBAction)copyStringToPasteBoard{
UIPasteboard *appPasteBoard = [UIPasteboard pasteboardWithName:#"CopyFrom"
create:YES];
appPasteBoard.persistent = YES;
[appPasteBoard setString:textView.text];
}
PasteTo Source Code
-(IBAction)pasteImageToPasteBoard{
UIPasteboard *appPasteBoard = [UIPasteboard pasteboardWithName:#"CopyFrom"
create:YES];
NSData *data = [appPasteBoard dataForPasteboardType:#"com.appshop.copyfrom.imagedata"];
imageView.image = [UIImage imageWithData:data];
}
-(IBAction)pasteStringToPasteBoard{
UIPasteboard *appPasteBoard = [UIPasteboard pasteboardWithName:#"CopyFrom"
create:YES];
textView.text = [appPasteBoard string];
}
Using UIPasteBoard in iPhone programming is amazingly simple and opens up some possibilities that we did not have a year ago. To use UIPasteBoard you simply create a instance using pasteboardWithName, put stuff into the paste board and then set the persistant property equal to YES. Then any app can get a reference to your paste board and use the data contained within. You can use it for simple strings and even data that you can put into NSData like SQLite databases.
Well, as far as I can tell ~80k is too much for a custom URL handler. But you could try to Base64-encode your data and append it to the custom URL. But I doubt that it will work with lots of data.
You could also have a look on the UIDocumentInteractionController, which is intended to open files with other applications that support them. This is what the Mail application does when you open an attachment with another app.
https://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIDocumentInteractionController_class/Reference/Reference.html#//apple_ref/doc/uid/TP40009304
using custom URL handler
it is specified, so it will not meet your specification.
But if you don't care about that, I would write to internal memory (file system)the 80k image, even if 80Mb and pass the "url" for the other app.
Big ego, and 0 effort in research:
copy to images folder
IPC communication via url
and my solution doesn't work... I am not giving fish, just teaching hot to get a fish.