ios - 将 ViewController 嵌入到一个主视图 Controller 的多个 ContainerView 中

Question

我使用此代码(来自 this 答案)以及分段控件在容器 View 中的 viewController 之间切换，同时我使用它在第二个容器 View 中显示另一个 viewController相同的 View Controller 。因此，我必须注释掉删除先前 VC 的原始代码，以便嵌入两个容器 View 。 (1)如何清理之前的VC？ (2) 请注意，我还将依赖项注入(inject)到子 VC 中，这样可以吗？

class ViewEmbedder {
    class func embed(parent:UIViewController,date: Date, container:UIView, child:UIViewController, previous:UIViewController?){

//        if let previous = previous {
//            print("previous = \(previous.description)")
////            if previous != ScoreAndStatsTableViewController {
////                //remove
////            }
//            
//            removeFromParent(vc: previous)
//        }
        child.willMove(toParentViewController: parent)

        if let hdtvc = child as? HealthDataTableViewController {
            hdtvc.startDate = date
        }
        if let idtvc = child as? IceDataTableViewController {
            idtvc.startDate = date
        }
        if let stvc = child as? ShiftTableViewController {
            stvc.startDate = date
        }




        parent.addChildViewController(child)
        container.addSubview(child.view)
        child.didMove(toParentViewController: parent)
        let w = container.frame.size.width;
        let h = container.frame.size.height;
        child.view.frame = CGRect(x: 0, y: 0, width: w, height: h)
    }

    class func removeFromParent(vc:UIViewController){
        vc.willMove(toParentViewController: nil)
        vc.view.removeFromSuperview()
        vc.removeFromParentViewController()
    }

    class func embed(withIdentifier id:String, startDate: Date, parent:UIViewController, container:UIView, completion:((UIViewController)->Void)? = nil){
        let vc = parent.storyboard!.instantiateViewController(withIdentifier: id)
        embed(
            parent: parent,
            date: startDate,
            container: container,
            child: vc,
            previous: parent.childViewControllers.first
        )
        completion?(vc)
    }
}

用法:

class KingViewController: UIViewController {

    var startDate = Date() 

    @IBOutlet weak var topContainerView: UIView!

    @IBOutlet weak var bottomContainerView: UIView!


    @IBAction func controlDidChange(_ sender: UISegmentedControl) {

        switch sender.selectedSegmentIndex  {
        case 0:
            ViewEmbedder.embed(withIdentifier: "IceDataTableViewController", startDate: startDate, parent: self, container: bottomContainerView) { (bvc) in

            }
        case 1:
            ViewEmbedder.embed(withIdentifier: "HealthDataTableViewController",startDate: startDate, parent: self, container: bottomContainerView) { (bvc) in

            }
        case 2:
            ViewEmbedder.embed(withIdentifier: "ShiftTableViewController", startDate: startDate, parent: self, container: bottomContainerView) { (stvc) in

            }

Answer 1

这感觉有点像黑客，但这就是我在嵌入新的 VC 之前清理现有 VC 时想到的:仍然对任何更有说服力的建议持开放态度。

import Foundation
import UIKit

class ViewEmbedder {
    class func embed(id: String, parent:UIViewController,date: Date, container:UIView, child:UIViewController, previous:UIViewController?){

        let childVCArray = parent.childViewControllers
        for vc in childVCArray {
            print(vc.description)
            let vcID = vc.restorationIdentifier
            if vcID != id {
                vc.removeFromParentViewController()
            }

        }

        child.willMove(toParentViewController: parent)

        if let hdtvc = child as? HealthDataTableViewController {
            hdtvc.startDate = date
        }
        if let idtvc = child as? IceDataTableViewController {
            idtvc.startDate = date
        }
        if let stvc = child as? ShiftTableViewController {
            stvc.startDate = date
        }

        parent.addChildViewController(child)
        container.addSubview(child.view)
        child.didMove(toParentViewController: parent)
        let w = container.frame.size.width;
        let h = container.frame.size.height;
        child.view.frame = CGRect(x: 0, y: 0, width: w, height: h)
    }

    class func removeFromParent(vc:UIViewController){
        vc.willMove(toParentViewController: nil)
        vc.view.removeFromSuperview()
        vc.removeFromParentViewController()
    }

    class func embed(withIdentifier id:String, startDate: Date, parent:UIViewController, container:UIView, completion:((UIViewController)->Void)? = nil){
        let vc = parent.storyboard!.instantiateViewController(withIdentifier: id)
        embed(
            id: id,
            parent: parent,
            date: startDate,
            container: container,
            child: vc,
            previous: parent.childViewControllers.first
        )
        completion?(vc)
    }
}