XCode : Number pad with point for comma

I have a number pad with done button. But the us开发者_StackOverflow社区er can only choose numbers without commas. Is there a way to have a number pad with donebutton (which I have), integrated with punctuation, or at least a point for the comma?

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Your question implies that you're doing to be doing some formatted number. It would then seem like a safe assumption that you're going to be working with a fixed number of decimal places (as it is more common to see a formatted number with a fixed number of decimal places than without).

If this is true, then you don't need the . or , buttons at all. You could just start with the fixed number of decimal places and shift stuff over. For example, let's say you want to type the number "4,238.07".

______.__  //type 4
______._4  //type 2
______.42  //type 3
_____4.23  //type 8
____42.38  //type 0
___423.80  //type 7
_4,238.07