如何在iOS中自动加载第一次单击按钮？

我使用.xib文件创建了一个按钮。我希望应用程序自动加载第一个问题（意思是当应用程序首次启动时ViewController自动加载“showQuestion”方法。我是一个初学者。你是如何做到的？请帮助！谢谢

ViewController.m

- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{

//call the init method implemented by the superclass
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
self.questions = @[@"What is your name?",
                   @"How old are you?",
                   @"Where are you from?"];
return self;
}
- (IBAction)showQuestion:(id)sender{
     self.questionLabel.text = self.questions[currentIndex];
}

AppDelegate.m文件

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;
return YES;
}

---

在视图控制器的

-viewDidLoad

方法中，只需手动调用

-showQuestion

方法

i、 e.在ViewController.m中，添加以下内容：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self showQuestion:nil];
}

---

在视图控制器的

-viewDidLoad

方法中，只需手动调用

-showQuestion

方法

i、 e.在ViewController.m中，添加以下内容：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self showQuestion:nil];
}

---

在视图控制器的

-viewDidLoad

方法中，只需手动调用

-showQuestion

方法

i、 e.在ViewController.m中，添加以下内容：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self showQuestion:nil];
}

---

在视图控制器的

-viewDidLoad

方法中，只需手动调用

-showQuestion

方法

i、 e.在ViewController.m中，添加以下内容：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self showQuestion:nil];
}

试着这样做：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;

// Autoload first question
[vc showQuestion:nil];

return YES;
}

ViewController.h

- (IBAction)showQuestion:(id)sender;

试着这样做：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;

// Autoload first question
[vc showQuestion:nil];

return YES;
}

ViewController.h

- (IBAction)showQuestion:(id)sender;

试着这样做：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;

// Autoload first question
[vc showQuestion:nil];

return YES;
}

ViewController.h

- (IBAction)showQuestion:(id)sender;

试着这样做：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
ViewController *vc = [[ViewController alloc] init];
self.window.rootViewController = vc;

// Autoload first question
[vc showQuestion:nil];

return YES;
}

ViewController.h

- (IBAction)showQuestion:(id)sender;