Ok so after reading a bit more I understood that the target has to be a UIResponder which could be a UIViewController.
I am running into another issue now that the button is disabled. It’s grayed out for some reason. So when I press on it, no events are passed to the target. Any ideas why it is disabled?
cavalos0086@gmail.com
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@qiezishu I am having a hard time implementing this button myself. Did you use the storyboard to created? Also could you paste a snippet on how to enable it? Thanks!