- (id)fromViews:(NSArray *)views findViewWithClass:(Class)viewClass;

gistfile1.m

- (id)fromViews:(NSArray *)views findViewWithClass:(Class)viewClass {
    id retView = nil;
    for (UIView * subView in views) {
        if ([subView isKindOfClass:[UIAlertView class]]) {
            retView = subView;
            break;
        } else {
            if ([subView.subviews count]) {
                retView = [self fromViews:subView.subviews findViewWithClass:viewClass];
            }
        }
    }
    return retView;
}