UINavigationController和UITabBarController的組合使用

1.導航類型

UINavigationController 適用於父子頁面的跳轉

UITabBarController 適用於平級頁面的跳轉

 

2.presentViewController / dismissViewControllerAnimated和pushViewController / popViewController

(1)只有從UINavigationController導航過來的UIViewController 纔可以使用pushViewController / popViewController，從其它導航進入的只能使用presentViewController / dismissViewControllerAnimated

(2)如果A界面是通過presentViewController進入的，那麼在A界面裏只能使用presentViewController導航，如果A界面是通過UINavigationController包裝了一層進入，則可使用pushViewController導航。

(3)如果A界面是一個UITabBarController，進入時是通過presentViewController來導航的，那麼子Tab裏也只能通過presentViewController來導航，如果進入時是通過UINavigationController包裝了一層進入，則可使用[self.tabBarController.navigationController pushViewController:abcdViewController animated:true];這種方式導航。

 

3.修改UINavigationController導航進入後導航欄的圖標及文字

UIBarButtonItem* leftBar = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(homeBack)];

self.navigationItem.leftBarButtonItem = leftBar;

//可添加多個導航按鈕

 

//    self.navigationItem.leftBarButtonItems = nil;

//同樣右邊的導航按鈕也可以設置

 

4.創建UITabBarController時需注意，要先創建出來，然後通過UINavigationController包裝後才能顯示，否則tab子項不顯示。創建格式如下

TabOneViewController* oneVC = [[TabOneViewController alloc]init];
    oneVC.view.backgroundColor = [UIColor whiteColor];
    UITabBarItem* item1 = [[UITabBarItem alloc]initWithTitle:@"tab1" image:nil tag:0];
    oneVC.tabBarItem = item1;

    TabTwoViewController* twoVC = [[TabTwoViewController alloc]init];
    UITabBarItem* item2 = [[UITabBarItem alloc]initWithTitle:@"tab2" image:nil tag:1];
    twoVC.tabBarItem = item2;

    HomeViewController* homeVC = [[HomeViewController alloc]init];
    NSArray* array = [[NSArray alloc]initWithObjects:oneVC,twoVC, nil];
    homeVC.viewControllers = array;

    UINavigationController* navVC = [[UINavigationController alloc]initWithRootViewController:homeVC];
    [self presentViewController:navVC animated:YES completion:^{}];

    //下面這種創建了HomeViewController後，HomeViewController下的子Tab不能通過push或者pop導航
    //    HomeViewController* homeVC = [[HomeViewController alloc]init];
    //    [self presentViewController:homeVC animated:YES completion:^{}];

 

 

5.UITabBarController各頁面之間的切換

實現UITabBarControllerDelegate協議

//實現協議方法，用於切換Tab時，更改頁面的標題
-(void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
    NSInteger index = tabBarController.selectedIndex;
    NSString *title;
    switch (index) {
        case 0:
            title = @"Message";
            break;
        case 1:
            title = @"User List";
            break;
    }
    self.title