IOS 12 keyboard display verification code

When the input box becomes the first responder, the data detector is used to heuristically infer that the incoming message carries the verification code, and the detected verification code is displayed on the QuickType bar, which the user can click to fill in.

One way to verify whether the SMS verification code format is legal is to open the SMS on the iPhone and click the verification code in the message. If you copy the verification code option from the bottom, you can explain. On the contrary, it is not;