在子级ViewController中重用父级ViewController故事板文件 [英] Reuse parent ViewController storyboard file in Child ViewController

问题描述

使用storyBoard呈现ViewController: 如果newViewController位于StoryBoard中，则可以使用以下方法进行显示.

Presenting ViewController Using storyBoard: if newViewController is in StoryBoard.we can present it using the following method.

 let storyboard = UIStoryboard(name: "AViewController"), bundle: UIBundle.main)
let newViewcontroller = storyboard.instantiateInitialViewController() as? AViewController
  self.present(newViewcontroller, animated: false, completion: nil)

是否可以提供不在StoryBoard中但其父viewcontroller具有Storyboard的ViewController

我已经以编程方式创建了一个B viewcontroller(没有StoryBoard)，现在我想展示BViewController，它应该使用AViewController StoryBoard吗?

I have create a B viewcontroller programatically (No StoryBoard) ,now I would like to present BViewController and it should use the AViewController StoryBoard?

class AViewController : UIViewController
{
//this class is in storyboard which is generic design that I want to use it in different ways.
}
class BViewController : AViewController
{
....//
}
e.g.
 self.present(BViewController(), animated: false, completion: nil)?

当我展示BViewcontroller时，它会为超类中的参数抛出nil.

when I present BViewcontroller it throws nil for parameters which are from super class.

推荐答案

我找到了重用故事板文件或继承故事板文件的答案.

I founded the answer to reuse the story board file or inherite the story board file.

object_setClass (设置对象的类.)将使用BViewController类覆盖AViewController的实例.因此，在AViewController之上，您可以添加更多方法.

object_setClass(Sets the class of an object.) will override instance of AViewController with BViewController Class. So on top of AViewController you can add some more methods.

当您具有类似的viewcontroller并进行很小的更改时.您必须创建不同的ViewController.使用此方法，您可以在带有故事板的基本viewcontroller上创建并重复使用该viewcontroller.

when you have similar viewcontroller with small changes. you have to create different viewcontrollers. using this method you can create on basic viewcontroller with storyboard and reuse that viewcontroller .

 class BViewController{
       static func vcInstanceFromStoryboard() ->BViewController? {
            let storyboard = UIStoryboard(name: "AViewController"), bundle: UIBundle.main)
            let instance = storyboard.instantiateInitialViewController() as? AViewController
            object_setClass(instance, BViewController.self) // 
            return (instance as? BViewController)!
        }
    .....
    } 

This is an example of how do we use it:
let vc = BViewController.vcInstanceFromStoryboard()
self.present(vc , animation : true)

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