How to toggle autocorrectionType on and off for an existing UITextView

Question

I have a UITextView in my iPhone app for which I want to be able to toggle the autocorrectionType.

When a user is editing the text view, I want the autocorrectionTy

Answer 1

In addition to changing the autocorrection type to UITextAutoCorrectionNo, the UITextView must be forced to reevaluate its correction state. setNeedsRedraw is insufficient but setting the text to itself, e.g.

textView.autocorrectionType = UITextAutocorrectionTypeNo;
textView.text = textView.text;

makes the red dashed lines go away. NOTE: this workaround relies on undocumented behavior and is not guaranteed to work on future iOS releases.