自定義標籤欄

一.刪除系統的標籤欄上的按鈕(tabbarItem)

//設置tabbar的背景
    [self.tabBar setBackgroundImage:[UIImage imageNamed:@"tab_bg_all.png"]];
   
    //刪除系統的tabbarItem

    NSArray *array = self.tabBar.subviews;

    //注意：UITabBarButton是一個私有的API，沒有公開出來
    //遍歷tabbar中所有的子視圖，並且移除tabbarItem
    for (UIView *view in array) {
        Class cls = NSClassFromString(@"UITabBarButton");
        if ([view isKindOfClass: cls]) {
            //移除tabbar上的按鈕
            [view removeFromSuperview];
        }
    }
   

    //創建自己的圖片

    //創建選擇視圖
    _selectedImgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"selectTabbar_bg_all1"]];
    _selectedImgView.frame = CGRectMake(0, 0, 49, 49);
    [self.tabBar addSubview:_selectedImgView];
   
    //創建按鈕
    NSArray *imgArr = @[@"movie_home.png",
                        @"msg_new.png",
                        @"start_top250.png",
                        @"icon_cinema.png",
                        @"more_setting.png"];
   
    NSArray *titleArrray = @[@"電影", @"新聞", @"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;

        }

當push到二級界面時,隱藏標籤欄

在自定義初始化方法中

        self.hidesBottomBarWhenPushed = YES;

二,情況二,隱藏系統的標籤欄,自定義標籤欄

self.tabBar.hidden = YES;

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

當push到二級界面時,隱藏標籤欄

#pragma  mark  -  UINavigationControllerDelegate
//進入到二級界面以後隱藏標籤欄(自定義的)

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    //獲取標籤欄
    MainTabBarViewController *mainBar = (MainTabBarViewController *)self.tabBarController;
    //當前控制器的個數
    NSInteger count = self.viewControllers.count;
    if (count == 1) {
        //顯示標籤欄
        [UIView animateWithDuration:0.2 animations:^{
            mainBar.taBarView.right = kScreenWidth;
        }];
    }else if (count == 2){
   
        [UIView animateWithDuration:0.2 animations:^{
            mainBar.taBarView.right = 0;
        }];
    }
   
}