Question

我遇到与用户“Flocked”类似的问题（请参阅此处的问题：Load an other View from applicationDidFinishLaunching in the AppDelegate），但在阅读了他的帖子之后，我没有设法解决，也许我的情况与他不同。 / p>

我的didFinishLaunchingWithOptions内部有一个例程，用于检查应用程序是否第一次运行（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，我无法加载另一个视图InfoView（设置视图）。我试过了：

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

在if ([[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"])

内

但没有运气。有什么想法或帮助吗？

Answer 1

试试这个：

- (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;
}

Answer 2

您正试图在[self presentViewController:infoView animated:YES completion:nil];上致电self UIResponder，因为您在AppDelegate。[self.window makeKeyAndVisible];。您应该在UIViewController上调用它，可能在您的情况下 viewController 。

编辑：这是要拨打的电话， otherwise self.window.rootViewController [self.window.rootViewController presentViewController:infoView animated:YES completion:nil];后，将为

。

{{1}}

从AppDelegate.m加载视图（默认情况下的其他视图）

2 个答案: