I want to set the marked text programmatically and since iOS5 UITextView and UITextField conform to UITextInput this should be possible but for some reason I always get the markedText to be nil. :( What am I missing here?

This is what I've tried without success:

(While the textview is firstResponder)

1.- When the text view contains no text:

text: "", selectedRange : {0,0}, markedText: nil.

[_textView setMarkedText:@"?" selectedRange:NSMakeRange(0, 1)];

Result: text : "", selectedRange: {0,0}, markedText: nil. (Nothing changed)

2.- When the text view contains text + some marked text:

text : "AAA", selectedRange = {0,3}, marked text at the end : "??" then I do:

[_textView setMarkedText:@"?" selectedRangeNSMakeRange(0,3)];

Result : text :"AAA", selectedRange: {0,3}, markedText: nil; (the marked text became nil)

In both cases is like setMarkedText:selectedRange: would be setting the current marked text (if some) to nil.

Any help would be highly appreciated :)