导航控制器推式视图控制器

小编典典

导航控制器推式视图控制器

swift

题

如何仅使用按钮的touch up内部事件从一个视图控制器导航到另一个视图控制器？

更多信息

我在一个示例项目中尝试执行的步骤是：

创建示例单视图应用程序。
为用户界面（ViewController2）添加一个新文件->具有XIB的Objective-C类。
在ViewController.xib中添加一个按钮，并控制单击ViewController.h的按钮以创建内部补全事件。
转到ViewController.m中新制作的IBAction并将其更改为…
```
- (IBAction)GoToNext:(id)sender
```
{
ViewController2 *vc2 = [[ViewController2 alloc] initWithNibName:@”ViewController2” bundle:nil];
```
[[self navigationController] pushViewController:vc2 animated:YES];
```
}

代码运行无误，我使用NSLog测试了按钮的功能。但是，它仍然不能将我导航到第二个视图控制器。任何帮助，将不胜感激。

阅读 289

2020-07-07

共1个答案

小编典典

迅捷3

 **Push**

喜欢

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("NewsDetailsVCID") as NewsDetailsViewController 
 vc.newsObj = newsObj
 navigationController?.pushViewController(vc,
 animated: true)

或更安全

  if let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "NewsDetailsVCID") as? NewsDetailsViewController {
        viewController.newsObj = newsObj
        if let navigator = navigationController {
            navigator.pushViewController(viewController, animated: true)
        }
    }

当下

   let storyboard = UIStoryboard(name: "Main", bundle: nil)
   let vc = self.storyboard?.instantiateViewControllerWithIdentifier("NewsDetailsVCID") as! NewsDetailsViewController
      vc.newsObj = newsObj
           present(vc!, animated: true, completion: nil)

或更安全

   if let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "NewsDetailsVCID") as? NewsDetailsViewController
     {

     vc.newsObj = newsObj
    present(vc, animated: true, completion: nil)
    }





//Appdelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController"
                                                       bundle:nil];
    UINavigationController *navigation = [[UINavigationController alloc]initWithRootViewController:self.viewController];
    self.window.rootViewController = navigation;
    [self.window makeKeyAndVisible];
    return YES;
}


//ViewController.m

- (IBAction)GoToNext:(id)sender 
{
    ViewController2 *vc2 = [[ViewController2 alloc] init];     
    [self.navigationController pushViewController:vc2 animated:YES];
}

迅速

//Appdelegate.swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
    self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

    let navigat = UINavigationController()
    let vcw = ViewController(nibName: "ViewController", bundle: nil)

    // Push the vcw  to the navigat
    navigat.pushViewController(vcw, animated: false)

    // Set the window’s root view controller
    self.window!.rootViewController = navigat

    // Present the window
    self.window!.makeKeyAndVisible()
    return true
}

//ViewController.swift

@IBAction func GoToNext(sender : AnyObject)
{
    let ViewController2 = ViewController2(nibName: "ViewController2", bundle: nil)
    self.navigationController.pushViewController(ViewController2, animated: true)
}

2020-07-07