目錄：
1、利用ViewController中間過渡
2、直接設置UITabBarController的數組
比較：相對來說第2中方式較方便，設置內容、標題等比較清晰明確，第1中方式中設置標題等內容時容易搞混，相對第2中方式沒有較大的優勢。
1、利用ViewController中間過渡
AppDelegate中代碼設置
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;
return YES;
}
ViewController中代碼設置
//初始化要使用的三個VC
FirstVc *first = [[FirstVc alloc] init];
SecondVc *second = [[SecondVc alloc] init];
ThirdVc *third = [[ThirdVc alloc] init];
//初始化三個nav
UINavigationController *firstNav = [[UINavigationController alloc] initWithRootViewController:first];
firstNav.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"111" image:nil tag:1];
UINavigationController *secondNav = [[UINavigationController alloc] initWithRootViewController:second];
secondNav.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"" image:nil tag:1];
UINavigationController *thirdNav = [[UINavigationController alloc] initWithRootViewController:third];
thirdNav.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"333" image:nil tag:1];
//初始化UITabBarController
self.tabBarCont = [[UITabBarController alloc] init];
self.tabBarCont.viewControllers = @[firstNav,secondNav,thirdNav];
self.tabBarCont.selectedIndex = 0;
self.tabBarCont.delegate = self;
self.tabBarCont.view.frame = self.view.frame;
[self.view addSubview:self.tabBarCont.view];
各個VC中的設置
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
}
- (void)viewWillAppear:(BOOL)animated
{
self.title = @"first";//此設置改變nav的標題和底部item的標題
self.navigationController.title = @"111";//item標題
}
2、直接設置UITabBarController的數組
AppDelegate中設置
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
//初始化
FirstVc *first = [[FirstVc alloc] init];
SecondVc *second = [[SecondVc alloc] init];
ThirdVc *third = [[ThirdVc alloc] init];
//創建標簽欄控制器
tabBarControl = [UITabBarController new];
//放入標簽欄中
tabBarControl.viewControllers = @[first,second,third];
//創建導航欄控制器，并指定他的根視圖控制器
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:tabBarControl];
//添加中間的按鈕
//缺點：1、按鈕超過bottom的部分點擊無響應 2、點擊除按鈕外的中間部分時也展示中間item的頁面
//3個item是可能范圍太大，如果調整item數量，缺點2應該影響不大。
UIButton *btn = [[UIButton alloc] init];
btn.backgroundColor = [UIColor redColor];
[btn setFrame:CGRectMake(130, -12, 60, 60)];
btn.clipsToBounds = YES;
btn.layer.cornerRadius = 30;
[btn addTarget:self action:@selector(clickCenterButton) forControlEvents:UIControlEventTouchUpInside];
[tabBarControl.tabBar addSubview:btn];
//指定應用的跟視圖控制器
self.window.rootViewController = nav;
return YES;
}
各個VC中的設置
- (instancetype)init
{
self = [super init];
if (self)
{
self.title = @"111";//此處的title是item的標題
//設置圖標的默認圖片和選中后圖片
self.tabBarItem.image = [[UIImage imageNamed:@"tabbar_mainframe@2x"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBarItem.selectedImage = [[UIImage imageNamed:@"tabbar_mainframeHL@2x"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
//未讀消息數量（右上角標識）
[self.tabBarItem setBadgeValue:@"18"];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
}
- (void)viewWillAppear:(BOOL)animated
{
self.tabBarController.navigationItem.title = @"first";//共同使用一個navigation，要在此方法中設置名稱
//設置右邊導航按鈕
UIBarButtonItem *rightItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(tapAdd)];
self.tabBarController.navigationItem.rightBarButtonItem = rightItem;
}
- (void)tapAdd
{
//此處跳轉頁面操作
//或者彈出頁面
}
