The number of characters remaining in a custom character limit.
Mac Catalyst 13.0+Beta
Set this property to a non-nil value when you want to make the character count view appear in the compose view (changing the value redraws the character count view). The default value of this property is nil.
Performs validation of the current content and updates the state of the Post button, if appropriate.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.