ios - 在初始运行时打开不同的 View

我正在尝试让我的应用在首次加载时启动不同的视图。目前，我已经获得了这段代码，该代码实现了应用程序首次启动时应该发生的事情。我有此代码，但缺少打开Initialviewviewcontroller的代码。我不知道如何执行此操作，因此将不胜感激

 NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
 BOOL hasRunBefore = [defaults boolForKey:@"FirstRun"];

 if (!hasRunBefore) {
[defaults setBool:YES forKey:@"FirstRun"];
[defaults synchronize];
// what goes here??

else
{
NSLog (@"Not the first time this controller has been loaded");

因此，我应该在if语句中启动其他视图控制器。但是我应该放什么呢？

最佳答案

解决方案1 ​​

我为此编写了一个简单的代码段，因为我经常使用它。您可以找到它here。
随时使用，分叉或修改它!

解决方案2

您可以在AppDelelegate.m中执行类似的操作

在底部添加此简单方法:

- (BOOL)hasEverBeenLaunched
{
    // A boolean which determines if app has eer been launched
    BOOL hasBeenLaunched;

    // Testig if application has launched before and if it has to show the home-login screen to login
    // to social networks (facebook, Twitter)
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"HasAlreadyLaunched"]) {
        // Setting variable to YES because app has been launched before
        hasBeenLaunched = YES;
        // NSLog(@"App has been already launched");
    } else {
        // Setting variable to NO because app hasn't been launched before
        hasBeenLaunched = NO;
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasAlreadyLaunched"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        // NSLog(@"This is the first run ever...");
    }

    return hasBeenLaunched;
}

实现此方法后，您可以像这样使用它:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Determining Storyboard identifier for first view
    NSString *storyboardID = [self hasEverBeenLaunched]? @"MainView" : @"LoginView";
    // Setting proper view as a rootViewController
    self.window.rootViewController = [self.window.rootViewController.storyboard instantiateViewControllerWithIdentifier:storyboardID];

    return YES;
}

关于ios - 在初始运行时打开不同的 View ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19457386/