UITextView with Term and Privacy Hyperlink open in different UIViewController - ios

Question

I'm working with a TextView and I wanted to create two different links within a text where the user accepts the terms and conditions and the privacy policy.
Also I need each link to open a different UIViewController.
Can anyone help me with an example to understand how to achieve this?
I need to understand how to create two Hyper links and how to open them in two different ViewControllers
Thank you all for any help you can give me
For example ... I would like to get a TextView similar to this

Answer 1

You can use the following UITextView delegate Method and Attributed string Tested on swift 5.1 :
let attributedString = NSMutableAttributedString(string: "By continueing you agree terms and conditions and the privacy policy")
attributedString.addAttribute(.link, value: "terms://termsofCondition", range: (attributedString.string as NSString).range(of: "terms and conditions"))
attributedString.addAttribute(.link, value: "privacy://privacypolicy", range: (attributedString.string as NSString).range(of: "privacy policy"))
textView.linkTextAttributes = [ NSAttributedString.Key.foregroundColor: UIColor.blue]
textView.attributedText = attributedString
textView.delegate = self
textView.isSelectable = true
textView.isEditable = false
textView.delaysContentTouches = false
textView.isScrollEnabled = false
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
if URL.scheme == "terms" {
//push view controller 1
return false
} else if URL.scheme == "privacy"{
// pushViewcontroller 2
return false
}
return true
// let the system open this URL
}
The UITextView call this function if the user taps or longPresses the URL link. Implementation of this method is optional. By default, the UITextview opens those applications which are responsible for handling the URL type and pass them the URL. You can use this method to trigger an alternative action

Answer 2

Set your textView properties like this.
textView.attributedText = "By Continuing, you aggree to terms <a href='http://termsandservicelink'>Terms Of Services</a> and <a href='https://privacypolicylink'>Privacy Policy</a>".convertHtml()
textView.isEditable = false
textView.dataDetectorTypes = [.link]
textView.linkTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.blue, NSAttributedString.Key.underlineColor: UIColor.clear]
You can handle tap event on your link in this delegate.
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
//Check your url whether it is privacy policy or terms and do accordigly
return true
}
Here is String extension.
extension String{
func convertHtml() -> NSAttributedString{
guard let data = data(using: .utf8) else { return NSAttributedString() }
do{
return try NSAttributedString(data: data, options: [NSAttributedString.DocumentReadingOptionKey.documentType : NSAttributedString.DocumentType.html, NSAttributedString.DocumentReadingOptionKey.characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil)
}catch{
return NSAttributedString()
}
}
}

Answer 3

This result is reached using NSAttributedString, Using NSAttributedString, we can style the text,
myLabel.text = "By signing up you agree to our Terms & Conditions and Privacy Policy"
let text = (myLabel.text)!
let underlineAttriString = NSMutableAttributedString(string: text)
let range1 = (text as NSString).rangeOfString("Terms & Conditions")
underlineAttriString.addAttribute(NSUnderlineStyleAttributeName, value: NSUnderlineStyle.StyleSingle.rawValue, range: range1)
let range2 = (text as NSString).rangeOfString("Privacy Policy")
underlineAttriString.addAttribute(NSUnderlineStyleAttributeName, value: NSUnderlineStyle.StyleSingle.rawValue, range: range2)
myLabel.attributedText = underlineAttriString
Extend UITapGestureRecognizer to provide a convenient function to detect if a certain range (NSRange) is tapped on in a UILabel.
extension UITapGestureRecognizer {
func didTapAttributedTextInLabel(label: UILabel, inRange targetRange: NSRange) -> Bool {
// Create instances of NSLayoutManager, NSTextContainer and NSTextStorage
let layoutManager = NSLayoutManager()
let textContainer = NSTextContainer(size: CGSize.zero)
let textStorage = NSTextStorage(attributedString: label.attributedText!)
// Configure layoutManager and textStorage
layoutManager.addTextContainer(textContainer)
textStorage.addLayoutManager(layoutManager)
// Configure textContainer
textContainer.lineFragmentPadding = 0.0
textContainer.lineBreakMode = label.lineBreakMode
textContainer.maximumNumberOfLines = label.numberOfLines
let labelSize = label.bounds.size
textContainer.size = labelSize
// Find the tapped character location and compare it to the specified range
let locationOfTouchInLabel = self.locationInView(label)
let textBoundingBox = layoutManager.usedRectForTextContainer(textContainer)
let textContainerOffset = CGPointMake((labelSize.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x,
(labelSize.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y);
let locationOfTouchInTextContainer = CGPointMake(locationOfTouchInLabel.x - textContainerOffset.x,
locationOfTouchInLabel.y - textContainerOffset.y);
let indexOfCharacter = layoutManager.characterIndexForPoint(locationOfTouchInTextContainer, inTextContainer: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
return NSLocationInRange(indexOfCharacter, targetRange)
}
}
UITapGestureRecognizer send action to tapLabel:, and detect using the extension method didTapAttributedTextInLabel:inRange:.
#IBAction func tapLabel(gesture: UITapGestureRecognizer) {
let text = (myLabel.text)!
let termsRange = (text as NSString).rangeOfString("Terms & Conditions")
let privacyRange = (text as NSString).rangeOfString("Privacy Policy")
if gesture.didTapAttributedTextInLabel(myLabel, inRange: termsRange) {
print("Tapped terms")
} else if gesture.didTapAttributedTextInLabel(myLabel, inRange: privacyRange)
{
print("Tapped privacy")
} else {
print("Tapped none")
}
}