应用启动

[参考文档](https://blog.csdn.net/liuchuo/article/details/52558743）

设置启动图片

1. Target中选择General
   清空Launch Screen File

   
   
   

2. 点击Assets.xcassets 进入图片管理，新建lunchImage

   
   
   

3. 插入照片
   系统尺寸分辨率

   
   
   

设置StatusBar

1. 启动时隐藏
   在info.plist 中添加新字段 Status bar is initially hidden 值为 YES

2. 启动后显示
   在AppDelegate.m 文件中设置

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
      self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; 
      //延时2秒，以便用户看清楚启动页 
      [NSThread sleepForTimeInterval:2.0]; 
  
      LoginController *login = [[[LoginController alloc] initWithNibName:@"LoginController" bundle:nil] autorelease]; 
      self.navController = [[[UINavigationController alloc] initWithRootViewController:login] autorelease]; //初始化导航栏控制器 
      self.window.rootViewController = self.navController; 
    
      //启动完成后显示状态栏，该语句应该放在 makeKeyAndVisible 之前 
      [[UIApplication sharedApplication] setStatusBarHidden:NO];
      [self.window makeKeyAndVisible]; 
     return YES; 
} 

基本架构