pragma mark - 獲取當前view的viewcontroller

+(UIViewController *)getCurrentViewController:(UIView *) currentView
{
    if (currentView && [currentView isKindOfClass:[UIView class]])
    {
        for (UIView* next = currentView; next&&[next isKindOfClass:[UIView class]]; next = next.superview)
        {
            UIResponder *nextResponder = [next nextResponder];
            if ([nextResponder isKindOfClass:[UIViewController class]])
            {
                return (UIViewController *)nextResponder;
            }
        }
    }
    return nil;
}