A way to notify a PhoneGap webview when the keyboard shows or hides and include the keyboard height. Should be placed in MainViewController.m for use with PhoneGap.

Pass Keyboard Events to PhoneGap Webview

- (void)keyboardWillShowOrHide:(NSNotification*)notif
{
    CGRect keyboardFrame = [notif.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    keyboardFrame = [self.view convertRect:keyboardFrame fromView:nil];
    CGFloat height = keyboardFrame.size.height;
    
    BOOL showing = [notif.name isEqualToString:UIKeyboardWillShowNotification];
    NSString *showingString = showing ? @"true" : @"false";
    NSString *jsString = [NSString stringWithFormat:@"$(window).trigger(jQuery.Event('keyboardToggle', {showing: %@, height: %f}));", showingString, height];
    
    [self.webView stringByEvaluatingJavaScriptFromString:jsString];
}