Swift Thread 1: Fatal error: init(coder:) has not been implemented (Calling super solution doesn't work)

Question

大家好，我找遍了所有地方，仍然找不到解决我问题的方法。我这里有一个自定义 class :

import UIKit

/** 
  DatasourceController is simply a UICollectionViewController that 
allows you to quickly create list views.

 In order to render our items in your list, simply provide it with a 
Datasource object.
 */
open class DatasourceController: UICollectionViewController, 
UICollectionViewDelegateFlowLayout {

open let activityIndicatorView: UIActivityIndicatorView = {
    let aiv = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
    aiv.hidesWhenStopped = true
    aiv.color = .black
    return aiv
}()

open var datasource: Datasource? {
    didSet {
        if let cellClasses = datasource?.cellClasses() {
            for cellClass in cellClasses {
                collectionView?.register(cellClass, forCellWithReuseIdentifier: NSStringFromClass(cellClass))
            }
        }

        if let headerClasses = datasource?.headerClasses() {
            for headerClass in headerClasses {
                collectionView?.register(headerClass, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: NSStringFromClass(headerClass))
            }
        }

        if let footerClasses = datasource?.footerClasses() {
            for footerClass in footerClasses {
                collectionView?.register(footerClass, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: NSStringFromClass(footerClass))
            }
        }

        collectionView?.reloadData()
    }
}

public init() {
    super.init(collectionViewLayout: UICollectionViewFlowLayout())
}

required public init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

let defaultCellId = "lbta_defaultCellId"
let defaultFooterId = "lbta_defaultFooterId"
let defaultHeaderId = "lbta_defaultHeaderId"

override open func viewDidLoad() {
    super.viewDidLoad()
    collectionView?.backgroundColor = .white
    collectionView?.alwaysBounceVertical = true

    view.addSubview(activityIndicatorView)
    activityIndicatorView.anchorCenterXToSuperview()
    activityIndicatorView.anchorCenterYToSuperview()

    collectionView?.register(DefaultCell.self, forCellWithReuseIdentifier: defaultCellId)
    collectionView?.register(DefaultHeader.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: defaultHeaderId)
    collectionView?.register(DefaultFooter.self, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: defaultFooterId)
}

override open func numberOfSections(in collectionView: UICollectionView) -> Int {
    return datasource?.numberOfSections() ?? 0
}

override open func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return datasource?.numberOfItems(section) ?? 0
}

//need to override this otherwise size doesn't get called
open func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: view.frame.width, height: 50)
}

override open func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let cell: DatasourceCell

    if let cls = datasource?.cellClass(indexPath) {
        cell = collectionView.dequeueReusableCell(withReuseIdentifier: NSStringFromClass(cls), for: indexPath) as! DatasourceCell
    } else if let cellClasses = datasource?.cellClasses(), cellClasses.count > indexPath.section {
        let cls = cellClasses[indexPath.section]
        cell = collectionView.dequeueReusableCell(withReuseIdentifier: NSStringFromClass(cls), for: indexPath) as! DatasourceCell
    } else if let cls = datasource?.cellClasses().first {
        cell = collectionView.dequeueReusableCell(withReuseIdentifier: NSStringFromClass(cls), for: indexPath) as! DatasourceCell
    } else {
        cell = collectionView.dequeueReusableCell(withReuseIdentifier: defaultCellId, for: indexPath) as! DatasourceCell
    }

    cell.controller = self
    cell.datasourceItem = datasource?.item(indexPath)
    return cell
}

override open func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {

    let reusableView: DatasourceCell

    if kind == UICollectionElementKindSectionHeader {
        if let classes = datasource?.headerClasses(), classes.count > indexPath.section {
            reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: NSStringFromClass(classes[indexPath.section]), for: indexPath) as! DatasourceCell
        } else if let cls = datasource?.headerClasses()?.first {
            reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: NSStringFromClass(cls), for: indexPath) as! DatasourceCell
        } else {
            reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: defaultHeaderId, for: indexPath) as! DatasourceCell
        }            
        reusableView.datasourceItem = datasource?.headerItem(indexPath.section)

    } else {
        if let classes = datasource?.footerClasses(), classes.count > indexPath.section {
            reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: NSStringFromClass(classes[indexPath.section]), for: indexPath) as! DatasourceCell
        } else if let cls = datasource?.footerClasses()?.first {
            reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: NSStringFromClass(cls), for: indexPath) as! DatasourceCell
        } else {
            reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: defaultFooterId, for: indexPath) as! DatasourceCell
        }
        reusableView.datasourceItem = datasource?.footerItem(indexPath.section)
    }

    reusableView.controller = self

    return reusableView
}

open func getRefreshControl() -> UIRefreshControl {
    let rc = UIRefreshControl()
    rc.addTarget(self, action: #selector(handleRefresh), for: .valueChanged)
    return rc
}

@objc open func handleRefresh() {

}

open var layout: UICollectionViewFlowLayout? {
    get {
        return collectionViewLayout as? UICollectionViewFlowLayout
    }
}

}

它是我故事板中 UICollectionView 控制器的父 class。我在这里为它制作了一个控制器 class :

import LBTAComponents

class homeView: DatasourceController {

override func viewDidLoad() {
    super.viewDidLoad()
}

required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}

}

问题我得到线程 1: 致命错误: init(coder:) has not been implemented when 运行 this code 我已经尝试了解决方案：

required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}

这行不通。还有其他建议吗？如果你想亲自看看，我从 cocoapod 库中得到了这个框架：

连播 'LBTAComponents'

我怀疑这个问题与集合视图和情节提要有关，但我无法弄清楚。

Answer 1

每当 ViewController 初始化表单 Storyboard/XIB 时，它都会通过 init(coder: )

你的基础 class DatasourceController 覆盖初始化器

public init() {
    super.init(collectionViewLayout: UICollectionViewFlowLayout())
}

required public init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

所以当你在你的 HomeController 中调用 super.init(coder:...) 时，它实际上会调用 fatalError("init(coder:) has not been implemented") 看来写这个 class 的人不是一个好人 storyboard/xib情人。

您可以删除 DatasourceController 中的两个初始化程序，但请确保您在情节提要中设置了 Flow 布局。或者您可以将它们更改为调用 super。

如果您无法更改基础 class，则无法从 Storyboard 加载您的 VC。

Swift Thread 1: Fatal error: init(coder:) has not been implemented (Calling super solution doesn't work)

Swift Thread 1: Fatal error: init(coder:) has not been implemented (Calling super solution doesn't work)

xcode

custom-component

ios

swift