Disable iMessage in MFMessageComposeViewController

I'm developing an iPhone app that requires MFMessageComposeViewController to send texts as actual texts and not as iMessage. Is there a way to protect the texts from being sent as iMessage?

Can you disable your iMessage?

Go to Settings. Tap Messages. Turn iMessage off. Go back to Settings.

How do you disable iMessage for someone?

Ask The Other Person to Turn Off iMessage First, ask them to turn off iMessage. Go to iPhone settings and scroll down to 'Messages'. Then, turn off the toggle for 'iMessage'. If they don't have access to their iPhone (they have shifted to a non-iOS device), then deregistering from iMessage's servers is the only way.

What is Messageui in iOS?

The Message UI framework provides specialized view controllers for presenting standard composition interfaces for email and SMS (Short Messaging Service) text messages. Use these interfaces to add message delivery capabilities, without requiring the user to leave your app.

No. iOS controls the routing and there's no way to impact it. (Even from Messages you can't control this.)