Error with Number pad in a webview ( Swift)

my xcode gets this error when I put the mouse in the textfield in a webview:



Can't find keyplane that supports type 4 for keyboard iPhone-PortraitChoco-NumberPad; using 2382260317_PortraitChoco_iPhone-Simple-Pad_Default



in my html I put : < input type="text" pattern="\d*" ....

Note : this error only in case of Number Pad not in a text pad

I try this method : iOS Simulator-> Hardware-> Keyboard -> Uncheck the Connect Hardware Keyboard Option. but still having the same error :/

I use swift in xcode 6.1.1