Convert String To HTML In Swift

Question

I am sending a post request which contains an email address for the username and a password. The request works when I hard code in the email address ([email protected]) like this:

test%40test.com

However when I pass it the actual email address, it obviously doesn't work. In swift, how do I convert a string to it's HTML format (or URL format I guess). I found that iOS7 adds NSHTMLTextDocumentType which might be able to do that for me, but I can't find any examples in Swift. Here is one I found in Objective C:

NSURL *htmlString = [[NSBundle mainBundle]
URLForResource: @"helloworld" withExtension:@"html"];
NSAttributedString *stringWithHTMLAttributes = [[NSAttributedString alloc]   initWithFileURL:htmlString options:@{NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType} documentAttributes:nil error:nil];

How would this work in Swift? Or if anyone has a better / easier suggestion that would work with all versions of iOS I would appreciate it. I also don't want to reference third party libraries to make this work.

related (maybe duplicated?): stackoverflow.com/questions/24551816/swift-encode-url/… — Bryan Chen
– Bryan Chen, Commented Jul 14, 2014 at 22:34

PretzelJesus · Accepted Answer · 2014-07-14 22:59:35Z

5

Thanks Bryan I got the answer from within that thread. Here is what ultimately worked:

var originalString = "[email protected]"
var escapedString = originalString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLHostAllowedCharacterSet())
println("escapedString: \(escapedString)")

This prints out

test%40test.com

answered Jul 14, 2014 at 22:59

PretzelJesus

8993 gold badges11 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

J Kasparian Over a year ago

Swift 5: originalString.addingPercentEncoding(withAllowedCharacters: NSCharacterSet.urlHostAllowed)

richrad · Accepted Answer · 2014-07-14 22:39:59Z

1

Just tried this out in a playground and it seemed to work. This is the method I use in Objective-C to escape strings for URLs.

var email: CFStringRef = "[email protected]"
CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(nil, email, nil, "!*'();:@&=+$,/?%#[]", kCFStringEncodingASCII))

edited Jul 14, 2014 at 22:39

answered Jul 14, 2014 at 22:28

richrad

8641 gold badge10 silver badges19 bronze badges

2 Comments

PretzelJesus Over a year ago

Forgive my ignorance I am new to iOS development. Is this basically calling Objective C to perform this? If so, is there a native way in Swift to accomplish this?

richrad Over a year ago

It depends on your definition of native, I guess. CFURLCreateStringByAddingPercentEscapes is a function from CoreFoundation which is one of Apple's "standard libraries." So while that function itself is being bridged to Swift and was written in another language, part of what makes Swift so powerful out-of-the-box is that you get access to those libraries and the couple decades of work behind them.

Martin · Accepted Answer · 2022-04-03 07:48:00Z

0

This is the most recent solution:

yourString.addingPercentEncoding(withAllowedCharacters: .letters)

Adjust .letters to use different sets.

answered Apr 3, 2022 at 7:48

Martin

4,8432 gold badges54 silver badges68 bronze badges

Collectives™ on Stack Overflow

Convert String To HTML In Swift

3 Answers 3

1 Comment

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related