How to load rtf using url instead of local

Question

I have code to load local rtf files in textview but how to do i make it works for files located online

Since it does not works when i use url Here is url - http://howtotechworld.com/rtfdoc.rtf

Here is code

  if let rtf = NSBundle.mainBundle().URLForResource("http://howtotechworld.com/rtfdoc", withExtension: "rtf", subdirectory: nil, localization: nil) {
  do {
            let attributedString = try NSAttributedString(fileURL: rtf, options: [NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType], documentAttributes: nil)
            textView.attributedText = attributedString
            textView.editable = false
            print(attributedString)
   }
   catch _ {
            NSLog("catched a error");
   }

@LeoDabus sorry what do you mean what i am trying to do it use rtf file on server instead of local file — system hola, Jan 20 '16 at 07:51

Leo Dabus · Answer 1 · 2016-01-22T05:10:07.293

You should download your rtf data asynchronously and use NSAttributedString initialiser init(data: NSData, options: [String : AnyObject], documentAttributes dict: AutoreleasingUnsafeMutablePointer<NSDictionary?>) throws to load your data when completed:

// your web link
let rtfLink  = "http://www.aliectronics.com.au/thefournobletruths.rtf"
// make sure your link is valid NSURL using guard  
guard let rtfURL = NSURL(string: rtfLink ) else { return }
// creata a data task for your url
NSURLSession.sharedSession().dataTaskWithURL(rtfURL) {
    (data, response, error) in
    // use guard to make sure you get a valid response from the server and your data it is not nil and you got no errors otherwise return 
    guard
        let httpURLResponse = response as? NSHTTPURLResponse where httpURLResponse.statusCode == 200,
        let data = data where error == nil
    else { return }
    // you need to use dispatch async to update the UI
    dispatch_async(dispatch_get_main_queue(), { () -> Void in
        // NSAttributedString data initialiser throws an error so you need to implement Swift2 Do Try Catch error handling
        do {
            let attributedString = try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute : NSRTFTextDocumentType], documentAttributes: nil)
            textView.attributedText = attributedString
            textView.editable = false
            print("attributedString=====start")
            print(attributedString)
            print("attributedString=====end")
        } catch let error as NSError {
            print(error.localizedDescription)
        }
    })
}.resume()

score -1 · Answer 2 · answered Jan 20 '16 at 07:52

-1

This works in a Playground (obviously needs better handling of optionals than forced unwrapping, but you get the point):

import UIKit

let url = NSURL(string: "http://thewalter.net/stef/software/rtfx/sample.rtf")
let data = NSData(contentsOfURL: url!)

do {
  let options = [NSDocumentTypeDocumentAttribute : NSRTFTextDocumentType]
  let attributedString = try NSAttributedString(data: data!, options: options, documentAttributes: nil)
  print(attributedString)
} catch {
  NSLog("\(error)")
}

answered Jan 20 '16 at 07:52

Michael Kohl

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NSData(contentsOfURL: url!) should only be used for local resource – Leo Dabus Jan 20 '16 at 07:55
@LeoDabus Yes, but I provided an answer to what OP asked. Whether or not that's what should be done is not for me to decide. – Michael Kohl Jan 20 '16 at 07:56
I provided the info OP needed to do not use it – Leo Dabus Jan 20 '16 at 08:00
@systemhola What do you mean full code? The only thing that makes this different from your example is the optional unwrapping and setting the `textView` attributes... – Michael Kohl Jan 20 '16 at 08:03
@LeoDabus Instead of writing 4 comments you could have written answer, that would have helped OP more. – Michael Kohl Jan 20 '16 at 08:04
@MichaelKohl I am not here to just dump the code. The OP will learn much more searching for the answer with the info I gave. – Leo Dabus Jan 20 '16 at 14:45
1

@LeoDabus I see you posted an answer after all :) Very instructive, thank you! – Michael Kohl Feb 01 '16 at 16:37

How to load rtf using url instead of local

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