How to highlight Table Cell Accessory button on tap?

I’m following the Checklists app in Ch 2 of the iOS Apprentice book.

We use a Detail Disclosure Accessory in table cells, but there’s no visual indication when the accessory button is tapped. Is there some way to highlight the button on a tap?

The button does highlight but this doesn’t show up very well in the simulator. On the device it’s kinda hard to see because your finger is on top of it. But it becomes a bit lighter when tapped.

Ah, you’re right! The accessory button does seem a bit unresponsive though; if I tap it quickly the modal will appear without the button highlighting. In contrast, the + bar button always highlights.