Xcode11 iOS13 新建项目（黑屏）运行

第一步

/**

     * info.plist文件中 删除键值对

     * StoryBoardName : Main

     **

     */

第二步

- (void)scene:(UIScene *)scene
willConnectToSession:(UISceneSession *)session
      options:(UISceneConnectionOptions *)connectionOptions {
   
    if (@available(iOS 13.0, *)) {
        // iOS 13 创建UIWindow
        UIWindowScene *windowScene = (UIWindowScene *)scene;
        self.window = [[UIWindow alloc] initWithWindowScene:windowScene];
    } else {
        // 创建UIWindow
        self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    }
    
    LFVC *lfVC = [[LFVC alloc] init];
    UINavigationController *lf_navVC = [[UINavigationController alloc] initWithRootViewController:lfVC];
    self.window.rootViewController = lf_navVC;
    
    self.window.backgroundColor = [UIColor clearColor];
    [self.window makeKeyAndVisible];
    
}