ios - 从AppDelegate.m加载 View (默认情况下为其他 View )

我有一个与“Flocked”用户类似的问题(请参阅此处的问题Load an other View from applicationDidFinishLaunching in the AppDelegate)，但是在阅读了他的帖子后，我没有设法解决它，也许我的情况与他不同。

我的didFinishLaunchingWithOptions内部有一个例程，用于检查应用程序是否是首次运行(也来自其他用户):

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    if (![[NSUserDefaults standardUserDefaults] boolForKey:@"everLaunched"]) {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"everLaunched"];
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];
    }
    else{
        [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"firstLaunch"];
    }
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]) {

        NSLog(@"First run");
    }

    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:) name: kReachabilityChangedNotification object: nil];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

如果发生firstLaunch，则无法加载另一个视图InfoView(用于安装的视图)。
我努力了:

InfoView *infoView = [[InfoView alloc]init];
[self presentViewController:infoView animated:YES completion:nil];

里面if ([[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"])
但没有运气。有什么想法或帮助吗？

最佳答案

尝试这个:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];

    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:) name: kReachabilityChangedNotification object: nil];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];

    if (![defaults boolForKey:@"everLaunched"]) {
        NSLog(@"First run");
        [defaults setBool:YES forKey:@"everLaunched"];
        InfoView *infoView = [[InfoView alloc]init];
        [self.viewController presentViewController:infoView animated:YES completion:nil];
    }

    return YES;
}