ios - 创建第一个启动 View Controller

Question

我正在尝试创建一个“初始设置页面”，如果应用程序在设备上首次启动时会显示该页面。

我是这样写的:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];


    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"])
    {
        NSLog(@"not first launch");
        self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
        self.window.rootViewController = self.viewController;
        [self.window makeKeyAndVisible];
        return YES;

    }
    else
    {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
        [[NSUserDefaults standardUserDefaults] synchronize];



        NSLog(@"first launch");

    }
}

现在我想创建一个 View Controller 并在应用程序第一次启动时推送到这个 View Controller 。

我需要做什么？

Answer 1

创建一个新的 View Controller 。在 appDelegate.h 文件中导入 header ，同时创建该类的一个名为 initialViewController 的实例变量。

改变你的其他条件，如:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   if ([[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"])
   {
       NSLog(@"not first launch");
       self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
       self.window.rootViewController = self.viewController;
   }
   else
   {
       [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
       [[NSUserDefaults standardUserDefaults] synchronize];

       self.initialViewController = [[InitialViewController alloc] initWithNibName:@"InitialViewController" bundle:nil];
       self.window.rootViewController = self.InitialViewController;
       NSLog(@"first launch");
   }
   [self.window makeKeyAndVisible];
   return YES;
}