我的问题是我正在寻找同时使用情节提要和xib的方法。但是我找不到以编程方式加载和显示情节提要的正确方法。该项目是从xib开始开发的，现在很难将所有xib文件嵌套在情节提要中。所以我一直在寻找一种在代码中实现它的方法，就像使用alloc, init, pushviewControllers一样。就我而言，情节提要中只有一个控制器：UITableViewController，它具有静态单元格，其中包含一些我想显示的内容。如果有人知道在不进行大量重构的情况下使用xib和Storyboard的正确方法，我将不胜感激。

在情节提要中，转到“属性”检查器，然后设置视图控制器的“标识符”。然后，您可以使用以下代码显示该视图控制器。

UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *vc = [sb instantiateViewControllerWithIdentifier:@"myViewController"];
vc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:vc animated:YES completion:NULL];

迅捷3

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "viewController")
self.navigationController!.pushViewController(vc, animated: true)

迅捷2

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("viewController")
self.navigationController!.pushViewController(vc, animated: true)

先决条件

为您的视图控制器分配一个Storyboard ID。

IB>显示身份检查器>身份>故事板ID

斯威夫特（旧版）

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("viewController") as? UIViewController
self.navigationController!.pushViewController(vc!, animated: true)

编辑：斯威夫特2在弗雷德·A的评论中建议。

如果您想在没有任何navigationController的情况下使用，则必须使用以下代码：

    let Storyboard  = UIStoryboard(name: "Main", bundle: nil)
    let vc = Storyboard.instantiateViewController(withIdentifier: "viewController")
    present(vc , animated: true , completion: nil)

在属性检查器中，为该视图控制器提供标识符，以下代码对我有用

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
DetailViewController *detailViewController = [storyboard instantiateViewControllerWithIdentifier:@"DetailViewController"];
[self.navigationController pushViewController:detailViewController animated:YES];

试试这个

UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:@"Login"];

[[UIApplication sharedApplication].keyWindow setRootViewController:vc];

在swift
NavigationController和pushController中，您可以替换为

present(vc, animated:true , completion: nil)

对于3和4，可以执行此操作。优良作法是将故事板的名称设置为等于StoryboardID。

enum StoryBoardName{
   case second = "SecondViewController"
}
extension UIStoryBoard{
   class func load(_ storyboard: StoryBoardName) -> UIViewController{
      return UIStoryboard(name: storyboard.rawValue, bundle: nil).instantiateViewController(withIdentifier: storyboard.rawValue)
   }
}

然后您可以像这样将Storyboard加载到ViewController中：

class MyViewController: UIViewController{
     override func viewDidLoad() {
        super.viewDidLoad()
        guard let vc = UIStoryboard.load(.second) as? SecondViewController else {return}
        self.present(vc, animated: true, completion: nil)
     }

}

创建新的Storyboard时，只需在StoryboardID上设置相同的名称，然后在枚举“ StoryBoardName ”中添加Storyboard名称。

您总是可以直接跳到根控制器：

UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UIViewController *vc = [storyboard instantiateInitialViewController];
vc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:vc animated:YES completion:NULL];

以下扩展名将允许您加载Storyboard和关联的UIViewController。示例：如果您有一个UIViewController名为ModalAlertViewController和名为“ ModalAlert”的情节提要，例如

let vc: ModalAlertViewController = UIViewController.loadStoryboard("ModalAlert")

将同时加载Storyboard和UIViewController和vc将为类型ModalAlertViewController。注意假定情节提要的情节提要ID与情节提要具有相同的名称，并且该情节提要被标记为Is Initial View Controller。

extension UIViewController {
    /// Loads a `UIViewController` of type `T` with storyboard. Assumes that the storyboards Storyboard ID has the same name as the storyboard and that the storyboard has been marked as Is Initial View Controller.
    /// - Parameter storyboardName: Name of the storyboard without .xib/nib suffix.
    static func loadStoryboard<T: UIViewController>(_ storyboardName: String) -> T? {
        let storyboard = UIStoryboard(name: storyboardName, bundle: nil)
        if let vc = storyboard.instantiateViewController(withIdentifier: storyboardName) as? T {
            vc.loadViewIfNeeded() // ensures vc.view is loaded before returning
            return vc
        }
        return nil
    }
}