Attributted String link not opening - ios

Question

I need to set a couple of links on the click of an attributed string in a label/textview(UILabel is preferred). I used the following code for setting the links.(multiple links in same label).
NSMutableAttributedString *firstAttributedString = [[NSMutableAttributedString alloc] initWithString:#"By tapping 'Yes', you agree to the " ];
NSMutableAttributedString *secondAttributedString = [[NSMutableAttributedString alloc] initWithString:#"Terms of Use "];
[firstAttributedString appendAttributedString:secondAttributedString];
NSMutableAttributedString *thirdAttributedString = [[NSMutableAttributedString alloc] initWithString:#"and "];
[firstAttributedString appendAttributedString:thirdAttributedString];
NSMutableAttributedString *fourthAttributedString = [[NSMutableAttributedString alloc] initWithString:#"Privacy Policy "];
[firstAttributedString appendAttributedString:fourthAttributedString];
NSMutableAttributedString *fifthAttributedString = [[NSMutableAttributedString alloc] initWithString:#"of example"];
[firstAttributedString appendAttributedString:fifthAttributedString];
NSURL *URL = [NSURL URLWithString: #"example://termsOfUse"];
[secondAttributedString addAttribute: NSLinkAttributeName value: URL range: NSMakeRange(0, secondAttributedString.length)];
[alertTextView setUserInteractionEnabled: YES];
alertTextView.editable=NO;
alertTextView.attributedText = firstAttributedString;
alertTextView.dataDetectorTypes = UIDataDetectorTypeLink;
I have set my info.plist to respond to the url scheme call, but the method in the
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation
delegate is not triggering. So I am assuming the click is not getting triggered. What am I doing wrong here? What can I do to solve this?

Answer 1

Upon further review of your sample code, you are trying to modify secondAttributedString after it has been appended to firstAttributedString. This will not produce the results you want, as NSAttributedStrings are not like Arrays.
Think of appending strings like appending a copy of whatever you pass in.
Try adding the link attributes before appending secondAttributedString to the first one.
NSMutableAttributedString *firstAttributedString = [[NSMutableAttributedString alloc] initWithString:#"By tapping 'Yes', you agree to the " ];
NSMutableAttributedString *secondAttributedString = [[NSMutableAttributedString alloc] initWithString:#"Terms of Use "];
NSURL *URL = [NSURL URLWithString: #"example://termsOfUse"];
[secondAttributedString addAttribute: NSLinkAttributeName value: URL range: NSMakeRange(0, secondAttributedString.length)];
[firstAttributedString appendAttributedString:secondAttributedString];
NSMutableAttributedString *thirdAttributedString = [[NSMutableAttributedString alloc] initWithString:#"and "];
[firstAttributedString appendAttributedString:thirdAttributedString];
NSMutableAttributedString *fourthAttributedString = [[NSMutableAttributedString alloc] initWithString:#"Privacy Policy "];
[firstAttributedString appendAttributedString:fourthAttributedString];
NSMutableAttributedString *fifthAttributedString = [[NSMutableAttributedString alloc] initWithString:#"of example"];
[firstAttributedString appendAttributedString:fifthAttributedString];
[alertTextView setUserInteractionEnabled: YES];
alertTextView.editable=NO;
alertTextView.attributedText = firstAttributedString;
Make sure your UITextView has the following properties set:
textView.editable = NO;
textView.dataDetectorTypes = UIDataDetectorTypeAll;
textView.delegate = self; // assuming `self` is the ViewController
You should instead implement the following delegate method:
textView:shouldInteractWithURL:inRange:
and return NO and handle the action yourself.