iOS_OC_項目搭建

創建工程

整理工程

修改啓動頁

自定義App入口

#pragma mark - 程序啓動的時候就會調用
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    //1.創建窗口
    self.window = [[UIWindow alloc] initWithFrame: [UIScreen mainScreen].bounds];
    //2.設置窗口跟控制器
    ViewController *tabBarVc = [[ViewController alloc] init];
    self.window.rootViewController = tabBarVc;
    //3.顯示窗口 -> 成爲UIApplication主窗口
    [self.window makeKeyAndVisible];
    return YES;
}

修改UIViewController背景色:
self.view.backgroundColor = [UIColor blueColor];

自定義UITabBarController

1. 使用富文本格式自定義UITabBarItem選中的樣式

//獲取哪個類中UITabBarItem
    UITabBarItem *item = [UITabBarItem appearanceWhenContainedIn:self, nil];
    
    //設置按鈕選中標題的顏色:富文本:描述一個文字顏色，字體，陰影，空心，圖文混排
    //創建一個描述文本屬性的字典
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
    attrs[NSForegroundColorAttributeName] = [UIColor blackColor];
    [item setTitleTextAttributes:attrs forState:UIControlStateSelected];
    
    //設置字體尺寸:只有設置正常狀態下，纔會有效果
    NSMutableDictionary *attrsNor = [NSMutableDictionary dictionary];
    attrsNor[NSFontAttributeName] = [UIFont systemFontOfSize:13];
    [item setTitleTextAttributes:attrsNor forState:UIControlStateNormal];

2. 將UIViewController包裝成UINavigationController

WJZEssenceViewController *essenceVc = [[WJZEssenceViewController alloc] init];
    //包裝成UINavigationController
    UINavigationController *essenceNavVc = [[UINavigationController alloc] initWithRootViewController:essenceVc];
    //添加子控制器
    [self addChildViewController:essenceNavVc];

3. 自定義TabBar

#pragma mark - 自定義tabBar
- (void)setupTabBar{
    WJZTabBar *tabBar = [[WJZTabBar alloc] init];
    [self setValue:tabBar forKey:@"tabBar"];
}

4. 配置pch文件