tokenField:willAddToken: get called at strange moment

[chiahsien]

I'm trying to prevent user from adding duplicated token, and trying to limit maximum token counts.

So I try to do some checking like this:

- (BOOL)tokenField:(TITokenField *)tokenField willAddToken:(TIToken *)token {
  NSArray *titles = tokenField.tokenTitles;
  for (NSString *title in titles) {
    if ([title isEqualToString:token.title]) {
      // Prompt: duplicate!
      return NO;
    }
  }
  return (titles.count < kICDMaxNumberOfTags);
}

I'll prompt user that he is trying to add duplicated token.

But I found that this method gets called while tokenField begins editing and ends editing, which makes the prompt shows up if tokenField isn't empty.

I'm curious why addToken gets called when tokenField begins/ends editing. Any idea?

[thermogl]

The tokens get removed when the field loses focus, and re-adds them when the fields gets focus.

[nsolter]

I also ran into this. The problem is that addToken adds the token both to the model and the view. It's already in the model (_tokens) so just needs to be added as a subview. To fix it, I factored out an addTokenFromView from addToken, and called that from didBeginEditing(). I can submit this as a pull request if there's interest.