How to get back the text message just edited by Apple's mobile phone when it is cancelled?

Go into the draft box and see if there are any short messages that have just been edited. If there is no text message, it should basically be unrecoverable, so you have to edit one again and then send it.

Message is a cross-device network short message service provided by Apple for iOS 5. It allows devices such as iPad and iPod Touch that are not bound with mobile phone numbers to communicate with iPhone instantly, and can send text, pictures and videos, which is basically the functional experience of SMS. As long as the iOS device is upgraded to iOS 5 and can access the Internet, you can send and receive SMS for free and unlimited through iMessage. The security of IMessage is very high.