I am using the UUnput NGUI class to receive text input from a user. when I start typing a text box on mobile devices. the keyboard appears, and there is another text box with the OK / Done button (as well as the type of keyboard accessories, if we are talking about the iPhone).
Can I turn off this text box that appears on the keyboard? Or is it not even possible, and I remove only the spaces?
From what I could find while searching for a while, a keyboard appears that handles the Unity class “TouchScreenKeyboard”. but according to the Unity Scripting link there is nothing that could hide the text box inside the keyboard.
Unity Scripting Link: TouchInputKeyboard
PS: - I can still put the input in the text box, just by entering the text in them, I just want the extra text box on the keyboard to be deleted.
To be more clear, I have added images explaining this.
This is the screen.

When I start typing in one of the text fields. The keyboard is as follows. as you can see that the text box just above the keyboard is not original.

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