自定义标签栏

一.删除系统的标签栏上的按钮(tabbarItem)

//设置tabbar的背景
    [self.tabBar setBackgroundImage:[UIImage imageNamed:@"tab_bg_all.png"]];
   
    //删除系统的tabbarItem

    NSArray *array = self.tabBar.subviews;

    //注意：UITabBarButton是一个私有的API，没有公开出来
    //遍历tabbar中所有的子视图，并且移除tabbarItem
    for (UIView *view in array) {
        Class cls = NSClassFromString(@"UITabBarButton");
        if ([view isKindOfClass: cls]) {
            //移除tabbar上的按钮
            [view removeFromSuperview];
        }
    }
   

    //创建自己的图片

    //创建选择视图
    _selectedImgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"selectTabbar_bg_all1"]];
    _selectedImgView.frame = CGRectMake(0, 0, 49, 49);
    [self.tabBar addSubview:_selectedImgView];
   
    //创建按钮
    NSArray *imgArr = @[@"movie_home.png",
                        @"msg_new.png",
                        @"start_top250.png",
                        @"icon_cinema.png",
                        @"more_setting.png"];
   
    NSArray *titleArrray = @[@"电影", @"新闻", @"top", @"影院", @"更多"];
   
    CGFloat width = kScreenWidth / imgArr.count;
    CGFloat height = self.tabBar.height;
   
    for (int i = 0; i < imgArr.count; i++) {
        NSString *imgName = imgArr[i];

        NSString *title = titleArrray[i];

        MainTabbarItem *item = [[MainTabbarItem alloc] initWithFrame:CGRectMake(width * i, 0, width, height)
                                                           imageName:imgName
                                                               title:title];
       
        item.tag = 2015 + i;
        [item addTarget:self action:@selector(clickItem:) forControlEvents:UIControlEventTouchUpInside];

        [self.tabBar addSubview:item];

        if (i == 0) {
            _selectedImgView.center = item.center;

        }

当push到二级界面时,隐藏标签栏

在自定义初始化方法中

        self.hidesBottomBarWhenPushed = YES;

二,情况二,隐藏系统的标签栏,自定义标签栏

self.tabBar.hidden = YES;

    _taBarView = [[UIImageView alloc]initWithFrame:CGRectMake(0, kScreenHeight-55, kScreenWidth, 55)];

当push到二级界面时,隐藏标签栏

#pragma  mark  -  UINavigationControllerDelegate
//进入到二级界面以后隐藏标签栏(自定义的)

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    //获取标签栏
    MainTabBarViewController *mainBar = (MainTabBarViewController *)self.tabBarController;
    //当前控制器的个数
    NSInteger count = self.viewControllers.count;
    if (count == 1) {
        //显示标签栏
        [UIView animateWithDuration:0.2 animations:^{
            mainBar.taBarView.right = kScreenWidth;
        }];
    }else if (count == 2){
   
        [UIView animateWithDuration:0.2 animations:^{
            mainBar.taBarView.right = 0;
        }];
    }
   
}