不能对模态视图控制器进行模态分析

Question

目标：在一定时间内显示一个启动屏幕(3秒)，然后登录视图显示用于身份验证过程，如果此身份验证成功，则转到主页(许多应用程序(如facebook )都使用这种效果)。

我所做的是

MainViewController 1.将导航的根设置为

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  self.isLogIn = FALSE;
  self.window  =   [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  MainViewController    *mainView      =   [[MainViewController alloc]   initWithNibName:@"MainViewController" bundle:nil];
  self.navigationController            =   [[UINavigationController alloc] initWithRootViewController:mainView];
  self.window.rootViewController       =   navigationController;
  [self.window makeKeyAndVisible];
  return YES;

}

LogInViewController 2.在 MainViewController中呈现作为modalViewController

@implementation MainViewController
-(void) viewDidLoad {
  appDelegate                        =   [[UIApplication sharedApplication] delegate];
  LogInController   *logInController =   [[LogInController alloc]                 initWithNibName:@"LogInController"      bundle:nil];

  if ( !appDelegate.isLogIn )
     [self presentModalViewController:logInController animated:NO]; 
}

3.在splashScreen LogInViewController中呈现 as modalViewController

#implementation LogInViewController
-(void)viewDidLoad
{
    [super viewDidLoad];
    self.title                     =   @"Sign in";
    SplashScreen *splashController =   [[SplashScreen alloc]           initWithNibName:@"SplashScreen"         bundle:nil];

    [self presentModalViewController:splashController animated:NO];
    ;
}

}

4.在splashScreen中，在一定的时间之后解散自己

@implementation SplashScreen
- (void)viewDidLoad
{
    [super viewDidLoad];
    [self performSelector:@selector(removeSplashScreen) withObject:nil afterDelay:6.0];                         

}

-(void)removeSplashScreen{
    [self dismissViewControllerAnimated:YES completion:nil];
} 

Problem：显示日志视图，但在登录视图之前没有显示splashScreen。

我发现根本没有调用viewDidLoad of SplashScreen的方法。

有人能给我解释一下并指出我在这里错过了什么吗？欢迎在此发表所有意见。

Answer 1

这样做是因为你的应用程序代表的引用有问题

@implementation MainViewController
-(void) viewDidLoad {
   appDelegate                        =   (YourAppDelegate *)[[UIApplication sharedApplication] delegate];
   LogInController   *logInController =   [[LogInController alloc]                 initWithNibName:@"LogInController"      bundle:nil];

   if ( !appDelegate.isLogIn )
   [self presentModalViewController:logInController animated:NO]; 
 }