How to programmatically disable predictive view in WebView of iOS 8

Question

I'm designing a custom keyboard for iOS 8. It works fine on any UITextField but when it's in UIWebView, it shows predictions. Since it's allowed to have custom keyboard in iOS 8 I assume there should be a way to disable this view. Any help would be appreciated. Red area of the following picture:

Answer 1

I found a workaround solution for this problem. If you add type="email" instead of type="text" in your HTML file like bellow, iOS keyboard won't show the predictive view :)

<input type="email"/>

I temporarily mark this answer as the solution but if someone finds a way to do it from Objective-C part, I'll test and accept that answer as the solution.