Clickable link within NSMutableAttributedString needs to show another viewcontroller / storyboard

Question

I have a UITextView and NSMutableAttributedString which has a clickable link. I need this to show another storyboard but not quite sure how I could do this.

What I have so far works for external links but not a storyboard. Any help would be appreciated.

Not sure if the below code is the best way to approach it or not?

class HomeViewController: UIViewController {

    @IBOutlet weak var textView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let attributedString = NSMutableAttributedString(string: "Already have an account? Log in")
        attributedString.addAttribute(.link, value: "", range: NSRange(location: 25, length: 6))

        textView.attributedText = attributedString

    }

    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
        UIApplication.shared.open(URL)

        return false
    }


}

EDIT

After NikR answer I've updated my code to the following but still no success. It's still loading Google.

class HomeViewController: UIViewController, UITextViewDelegate {

    @IBOutlet weak var textView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let attributedString = NSMutableAttributedString(string: "Already have an account? Log in")
        attributedString.addAttribute(.link, value: "https://google.com", range: NSRange(location: 25, length: 6))

        textView.attributedText = attributedString
        textView.isSelectable = true
        textView.isEditable = false

        textView.delegate = self

    }

    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {

        let loginViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "loginViewController")
        show(loginViewController, sender: self)

        return true
    }


}

score 0 · Accepted Answer · answered Jun 11 '19 at 09:44

0

Yes it's the right way. But not call:

UIApplication.shared.open(URL)

Simply initiate your VC and show/present it:

let vc = UIStoryboard(name: "StoryboardName", bundle: nil).instantiateInitialViewController()
show( vc, sender: self )

And don't forget to:

textView.delegate = self

answered Jun 11 '19 at 09:44

NikR

628
4
14

The controller I want to show uses the same story board so I dont think I can use the ```instantiateInitialViewController ``` So I used ```let loginViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "LoginViewController")``` Should this still work? – CIB Jun 11 '19 at 11:58
Yes, it should. – NikR Jun 11 '19 at 11:58
I get this message in my console ```Could not find any actions for URL without any result.``` – CIB Jun 11 '19 at 12:01
Try to set some real URL in value with "https://", seems that it tries to parse url but cannot without a scheme – NikR Jun 11 '19 at 13:15
I tried that so if I pass ```https://google.com``` when the login link is clicked it opens safari and goes to google. It doesn't show my LoginViewController – CIB Jun 11 '19 at 13:20
Check that textView.delegate = self – NikR Jun 11 '19 at 13:41
Yeah I've added ```textView.delegate = self ``` i've updated my question to have the full code in there from your answer. – CIB Jun 11 '19 at 14:12
1

@craigib, you should return false from textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool . It will not pass control to iOS and allows you to handle it by youself – NikR Jun 11 '19 at 16:23
This worked, along with your original answer. Thanks – CIB Jun 11 '19 at 19:17

score 0 · Answer 2 · answered Jun 11 '19 at 09:45

0

you can set to your textView:

textView.dataDetectorTypes = .link

answered Jun 11 '19 at 09:45

Alastar

1,284
1
8
14

score 0 · Answer 3 · answered Jun 11 '19 at 10:08

0

You should enable isSelectable and disable isEditable for your text view.

textView.isSelectable = true
textView.isEditable = false

Don't forget to do this

textView.delegate = self

This Delegate method will use to handle click

func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {

}

answered Jun 11 '19 at 10:08

Rohit Parihar

352
1
7
14

When I add ```textView.delegate = self``` to my viewDidfLoad I get an error ```Cannot assign value of type 'HomeViewController' to type 'UITextViewDelegate?'``` – CIB Jun 11 '19 at 11:59
1

Replace class HomeViewController: UIViewController with class HomeViewController: UIViewController, UITextViewDelegate for implement delegate methods for UITextView. – Rohit Parihar Jun 11 '19 at 12:25
1

Or Just under your implementation extension HomeViewController: UITextViewDelegate { //... } – NikR Jun 11 '19 at 13:43
@NikR yes we can also add extension for UITextViewDelegate under class implementation – Rohit Parihar Jun 11 '19 at 14:04

Clickable link within NSMutableAttributedString needs to show another viewcontroller / storyboard

3 Answers3