isContentValid()
A Boolean value that indicates whether the current content and attachments are valid.
Declaration
func isContentValid() -> BoolReturn Value
true if the current content and attachments are valid for posting, otherwise false. The default return value is true.
Discussion
This method is automatically called after each change a user makes to the text in the compose view. You can use this method to determine whether the Post button should be enabled and to update charactersRemaining, if necessary.
A subclass should implement this method to perform custom validation of the user’s content before initiating a post.