SZMentionsSwift is a lightweight mentions library for iOS.

First of all, thank you for the great library that you have written. I have discovered an issue that could be reproduce as following:

1. Enable searchSpaces in SZMentionsListener
2. Type Any String "@tag String" Any String in text view.
3. Randomly keep changing cursor (Select text position) position (In quick manner) in text view.

It will throw the Range out of bounds issue.

Example of error message: *** Terminating app due to uncaught exception 'NSRangeException', reason: '-[__NSCFString substringWithRange:]: Range {72, 18} out of bounds; string length 86'

how to add "@" become @steven on textView when selected list of mention steven? and also how to get text (String) on text View ? thanks anyway.

Hey,

Thanks for the lib! In my case I need to manage 2 different kinds of mentions: some mentions should appear in blue, some others should appear in gray. But currently it seems you can only have them all blue, or all gray.

Do you think we could add this feature to the lib? I could help if needed.

Hi szweier,

I have added SZMentionsListener in my code. I also implemented textView(_:shouldChangeTextIn:replacementString:) in my controller. I realised that if I paste string from external app into the textview that has implemented this library. My callback not getting called. I have stepped into the library code.

else if text.count > 1 {
            //Pasting
            if let editedMention = mentions.mentionBeingEdited(atRange: range) {
                clearMention(editedMention)
            }

            textView.delegate = nil
            if let mutableAttributedString = textView.attributedText.mutableCopy() as? NSMutableAttributedString {
                mutableAttributedString.replaceCharacters(in: range, with: NSAttributedString(string: text))
                mutableAttributedString.apply(defaultTextAttributes, range: NSRange(location: range.location, length: text.count))
                mentionsTextView.selectedRange = NSRange(location: 0, length: 0)
                textView.attributedText = mutableAttributedString
                mentionsTextView.selectedRange = NSRange(location: range.location + text.count, length: 0)
            }
            
            mentions.adjustMentions(forTextChangeAtRange: range, text: text)
            textView.delegate = self
            
            return false
        }
        _ = delegate?.textView?(textView, shouldChangeTextIn: range, replacementText: text)

The delegate callback will not get called if it fulfilling the text pasting action. However, I need to do some adjustment to my UITextView (To resize the UI) if received the callback.

Is there any way I can get my delegate get called in the event of pasting text?

The problem in NSRange extension as I could find:

if spaceAfterMention = true then when user tap on mention func addMention then called add(createMention, spaceAfterMention: spaceAfterMention, at: currentMentionRange, with: mentionTextAttributes) then called replace(charactersIn: range, with: mention.mentionName(with: spaceAfterMention)), but in this place we use the selectedRange value obtained without taking into account the parameter spaceAfterMention and do not change it and that's why a space was added to the final line, but the cursor remained in the same place.

Well, after changing this

internal extension NSRange {
    func adjustLength(for text: String, with spaceAfterMention: Bool) -> NSRange {
        return NSRange(location: location, length: text.utf16.count)
    }
}

to this

internal extension NSRange {
    func adjustLength(for text: String, with spaceAfterMention: Bool) -> NSRange {
        let lenght = spaceAfterMention ? text.utf16.count + 1 : text.utf16.count
        return NSRange(location: location, length: lenght)
    }
}

I fixed the problem, but I'm not sure about the side effects of this fix. Can you check it? Should I submit a pull request?

@szweier I able to reproduce this issue again. It is just a bit tricky.

Step to reproduce:

1. Enable searchSpaces in SZMentionsListener
2. Type Hello this is example of @mention @this_is_false_mention in text view.
3. Randomly keep changing cursor (Select text position) position (In quick manner) in text view.

@mention is actual mention @this_is_false_mention is a random string that having starting character same as triggers. Example: "@" symbol.

I able to reproduce the issue in the project example as well.

It will throw the Range out of bounds issue.

Example of error message: *** Terminating app due to uncaught exception 'NSRangeException', reason: '-[__NSCFString substringWithRange:]: Range {72, 18} out of bounds; string length 86'

If I take the focus off of my textview by using it's resignFirstResponder function, all of the attributes disappear from my text view while the mentions still exist.

I think this may be a bug outside of this library, possibly in iOS frameworks itself?

When you have more than one mention and try to select all the text and delete it causes a crash. The problem occurs in shouldAdjust, specifically in forceDefaultAttributes when trying to do this:

mutableAttributedString.mutableString.replaceCharacters(in: range, with: text)

In handleEditingMention you are handling only one mention(the last you find) and deleting all the text from de textView but the range that you pass to forceDefaultAttributes is still the older one, so you get an out of bounds when you try to replace text in an empty string.

Is there a way to cancel searching and not resign the textView's firstResponder? I want to allow users to cancel searching by tapping a button or the textView.

My mentions listener has spaceAfterMention, addMentionOnReturnKey, and searchSpaces all set to true.

I'm trying to initialise the SZMentionsListener with a preexisting list of mentions. I found the insertExistingMentions method which seems to do what I want but the method is inaccessible from outside of the framework. Is this by design or should this method be made public?

Hi szweier,

The mentions library has overwritten my UITextView autoCapitalizationType type. It always capitalizes Words even though I have set my UITextView to Sentences. [For the auto-suggestion words]

I have tested with the sample in this project.

Could you please assist?

Thank you.

Hi @szweier , Hope you are doing great. Is there a way in library to handle mention list along the system emoji/custom emoji without using any extra empty space {" " } before system emoji or custom emojis, and we will be able to show the mention list on @Sign with them.

Waiting for your quick reply?

Regards, Mohsin

Hi @szweier , Hope you are doing great. Is there a way in library to handle mention list along the system emoji/custom emoji without using any extra empty space {" " } before system emoji or custom emojis, and we will be able to show the mention list on @Sign with them.

Waiting for your quick reply?

Regards, Mohsin

I'm getting an "'AttributeContainer' is ambiguous for type lookup in this context" error when I try to build with XCode 13. This is because XCode added a new AttributeContainer struct to Foundation, so now it's unclear which one my code refers to. Is there a simple way to resolve this ambiguity?

I have added 1 user to mention on textview, After that continue with adding text and its mention color resets. Please check the screenshots for that.

The first screen indicates that mention added while in the 2nd screen shows color of tagged user resets.

Please guide me on this. Facing the issue.

I'm using this library with '#' and '@' as triggers flawlessly, but I'm wondering if it's possible to also use it without triggers? i.e. it would display the mentions list as soon as user starts typing anything

My use case is that I'm building a sort of search textfield, so the user is not typing a comment, but rather searching something to select