How to enter a non-breaking space on iOS?

On Mac, entering a non-breaking space is very easy.

On my iPad, I want to enter a non-breaking space. But I find no way.

I have tried the mic on the keyboard. It gives me this :

Espace insécable

:-)

I would prefer a solution coming from the keyboard. I would also like a palette offering characters or snippets.

Thank you.

I have iOS 7.