DropUpMenu

##使用：

MenuView *menuView = [[MenuView alloc]init];
menuView.frame = CGRectMake(0, 568-44, 320, 44);
[menuView setBottomItems:@[@"工业", @"评论", @"信息化"]];
menuView.displayView = self.view;
menuView.delegate = self;
[self.view addSubview:menuView];