Ios 类中的Swift 4 Viewcontroller依赖项注入

我正在学习swift，并试图找出如何将视图控制器作为依赖项添加到我正在创建的类中。理想情况下，我想在初始化阶段添加它，这样它就“可靠”了

但是我不太明白，所以我希望有人能在这过程中帮助我。我得到的错误是：属性“self.homeController”未在super.init调用中初始化

基本上，我有一个类，它创建了一个覆盖，上面有一个弹出窗口，其中有一个UICollectionView，可以单击。单击该项时，菜单将显示动画，然后在“完成”时从homecontroller启动该功能

class SettingLauncher: NSObject, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {


    private let homeController: HomeController

    func showSettings(){

        // window is the full device since the view is smaller due to nav
        if let window = UIApplication.shared.keyWindow {

            blackView.alpha = 0
            blackView.backgroundColor = UIColor(white: 0, alpha: 0.6)
            blackView.frame = window.frame // set RECT to the same size as device
            blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))
            window.addSubview(blackView)
            window.addSubview(collectionView)
            let height:CGFloat = CGFloat(settings.count) * cellHeight
            let y = window.frame.height - height
            collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)

            UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {

                self.blackView.alpha = 1
                self.collectionView.frame = CGRect(x: 0, y: y, width: window.frame.width, height: window.frame.height / 2)

            }, completion: nil)

        }
    }

    @objc func handleDismiss(){
        UIView.animate(withDuration: 0.5,
           animations:{
                self.blackView.alpha = 0

            if let window = UIApplication.shared.keyWindow {
                self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)
            }

        }, completion: {_ in
            self.blackView.removeFromSuperview()
            self.homeController.showSettingsController()
        })
    }



    override init(){
        super.init()
        self.homeController = HomeController()
        collectionView.dataSource = self
        collectionView.delegate = self

        collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
    }
}

在homecontroller中，单击菜单按钮可初始化设置控制器，并告诉它显示：

let settingsLauncher = SettingLauncher()

    @objc func handleMore(){
        settingsLauncher.showSettings()
    }

    func showSettingsController(){
        let dummyController = UIViewController()
        navigationController?.pushViewController(dummyController, animated: true)
    }

---

错误告诉您必须在调用super.init（）之前初始化homeController属性，但您没有这样做

将代码更改为：

override init(){
    self.homeController = HomeController()
    super.init()
    collectionView.dataSource = self
    collectionView.delegate = self

    collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
}

---

错误告诉您必须在调用super.init（）之前初始化homeController属性，但您没有这样做

将代码更改为：

override init(){
    self.homeController = HomeController()
    super.init()
    collectionView.dataSource = self
    collectionView.delegate = self

    collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
}

---

在@supportoftruth和@Tj3n的帮助下解决了这个问题。在下面发布工作代码

class SettingLauncher: NSObject, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

    let homeController: HomeController

...other UICollectionview functions

    // on Item click insdie UIViewCollection
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

        UIView.animate(withDuration: 0.5,
                       animations:{
                        self.blackView.alpha = 0

                        if let window = UIApplication.shared.keyWindow {
                            self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)
                        }

        }, completion: {_ in
            let setting = self.settings[indexPath.item]
            self.blackView.removeFromSuperview()

            // Call function from Injected ViewController
            self.homeController.showControllerSetting(setting: setting)
        })

    }

    init(controller: HomeController){
        homeController = controller
        super.init()
        collectionView.dataSource = self
        collectionView.delegate = self
        collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
    }
}

my HomeController中的函数初始化SettingsLauncher类

    lazy var settingsLauncher:SettingLauncher = {
        let launcher = SettingLauncher(controller: self)
        return launcher
    }()

    @objc func handleMore(){
        settingsLauncher.showSettings()
    }

    func showControllerSetting(setting: Setting){
        let dummyController = UIViewController()
        navigationController?.pushViewController(dummyController, animated: true)
    }

---

在@supportoftruth和@Tj3n的帮助下解决了这个问题。在下面发布工作代码

class SettingLauncher: NSObject, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

    let homeController: HomeController

...other UICollectionview functions

    // on Item click insdie UIViewCollection
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

        UIView.animate(withDuration: 0.5,
                       animations:{
                        self.blackView.alpha = 0

                        if let window = UIApplication.shared.keyWindow {
                            self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)
                        }

        }, completion: {_ in
            let setting = self.settings[indexPath.item]
            self.blackView.removeFromSuperview()

            // Call function from Injected ViewController
            self.homeController.showControllerSetting(setting: setting)
        })

    }

    init(controller: HomeController){
        homeController = controller
        super.init()
        collectionView.dataSource = self
        collectionView.delegate = self
        collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
    }
}

my HomeController中的函数初始化SettingsLauncher类

    lazy var settingsLauncher:SettingLauncher = {
        let launcher = SettingLauncher(controller: self)
        return launcher
    }()

    @objc func handleMore(){
        settingsLauncher.showSettings()
    }

    func showControllerSetting(setting: Setting){
        let dummyController = UIViewController()
        navigationController?.pushViewController(dummyController, animated: true)
    }

---

太近了！谢谢你的回答，太接近了！但现在我只看到一个白色屏幕，应用程序出现错误。@SpencerBigum您必须使用xib或故事板初始化HomeController，才能为应用程序创建视图controller@Tj3n谢谢你的提醒。我现在唯一的问题是，在初始化它之后，Im'调用注入的控制器的方法-里面的代码似乎没有触发：let dummyController=UIViewController（）navigationController？.pushViewController（dummyController，animated:true），它将在导航堆栈上弹出一个空的视图控制器。我想你可能对你是如何努力实现你的目标感到困惑。有机会上传你的项目或测试版本吗？太接近了！谢谢你的回答，太接近了！但现在我只看到一个白色屏幕，应用程序出现错误。@SpencerBigum您必须使用xib或故事板初始化HomeController，才能为应用程序创建视图controller@Tj3n谢谢你的提醒。我现在唯一的问题是，在初始化它之后，Im'调用注入的控制器的方法-里面的代码似乎没有触发：let dummyController=UIViewController（）navigationController？.pushViewController（dummyController，animated:true），它将在导航堆栈上弹出一个空的视图控制器。我想你可能对你是如何努力实现你的目标感到困惑。是否有机会上传您的项目或测试版本？您还可以检查Typhone框架：您还可以检查Typhone框架：