如何在 ios 中单击按钮时切换到下一个控制器(以编程方式)

Question

>我正在研究单视图应用程序。单击按钮后，我想切换到下一页（假设菜单控制器）。请指定我必须在appdelegate中进行哪些更改才能添加导航控制器，因为我是iOS的新手。

[button addTarget:select action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside]; and implement the selector as
-(void)buttonClick{
UIViewController *menu = [[UIViewController alloc] init];
[self.navigationController pushViewController:menu animated:YES];
}

Answer 1

在根视图控制器的应用委托中添加以下内容：

FirstViewController *firstViewController = [[FirstViewController alloc] initWithNibName:@"view name" bundle:nil]; 
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:firstViewController];
self.window.rootViewController = navigationController; 

在按钮内单击：

SecondViewController *secondViewController = [[SecondViewController alloc] initWithNibName:@"view name" bundle:nil];
[self.navigationController pushViewController:secondViewController animated:YES];

Answer 2

您必须

Window.rootViewController设置UINavigationController，如下所示。

FirstViewController *viewController = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navigationController;

Answer 3

你应该子类UIViewController并实现你想要的视图。视图可以通过编程方式或在界面生成器中构建。

然后，您可以使用 segue、情节提要标识符或 xib 文件来加载视图。

可能看起来像这样：（假设您在故事板中设置了视图控制器，并将它们与适当的 segue 和下面的标识符连接起来）

-(void)buttonClick{
    [self performSegueWithIdentifier:@"MySegueIdentifier"];
}
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString: @"MySegueIdentifier"]) {
        MyCustomViewController* vc = (MyCustomViewController*)[segue destinationViewController];
        //do something with your view controller, like set a property
    }
}

或者也许像这样

-(void) buttonClick {
    MyCustomViewController* vc = (MyCustomViewController*)[[UIStoryboard storyboardWithName: @"MyStoryboard"] instantiateViewControllerWithIdentifier: @"MyStoryboardIdentifier"];
    [self.navigationController pushViewController: vc animated: YES]; //assuming current view controller is a navigation stack. Or could also do presentViewController:animated:
}

您将向项目添加一个类子类化UIViewController，并将其导入（#import "MyCustomViewController.h"在要从中推送的视图控制器的 .m 文件中）。

也可以使用 xib 文件，但我不会打扰这些，因为故事板更容易使用。

没有故事板：在应用委托中：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    navigationController = [[UINavigationController alloc] init]; //navigation controller is a property on the app delegate
    // Override point for customization after application launch.
    FirstViewController *firstViewController = [[FirstViewController alloc] init];
    [navigationController pushViewController: firstViewController animated:NO];
    [window addSubview:navigationController.view];
    [window makeKeyAndVisible];
    return YES;
}

在您的 FirstViewController 中：

-(void) buttonClick {
    MyCustomViewController* vc = [[MyCustomViewController alloc] init]; // or maybe you have a custom init method
    [self.navigationController pushViewController: vc animated: YES];
}

Answer 4

非常简单：

-(void)ButtonClickActionMethod
{
    [button addTarget:select action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
}

点击的操作：

-(void)buttonClick{
    YourViewController *view = [[YourViewController alloc] initWithNibName:@"YourViewController" bundle:nil];
    [self.navigationController pushViewController:view animated:YES];
}