cocos ios editBox 键盘退不下去

-(void) handleTouchesAfterKeyboardShow
{
NSArray *subviews = self.subviews;

for(UIView* view in subviews)
{
//if([view isKindOfClass:NSClassFromString(@"CCCustomUITextField")] ||
//[view isKindOfClass:NSClassFromString(@"UISingleLineTextField")] ||
//[view isKindOfClass:NSClassFromString(@"UIMultilineTextField")])
//{
//    if ([view isFirstResponder])
//    {
//        [view resignFirstResponder];
//        return;
//    }
//}
if([view isKindOfClass:NSClassFromString(@"CCCustomUITextField")] ||
[view isKindOfClass:NSClassFromString(@"CCUISingleLineTextField")] ||
[view isKindOfClass:NSClassFromString(@"CCUIMultilineTextField")])
{
if ([view isFirstResponder])
{
[view resignFirstResponder];
return;
}
}
}
}