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我已经阅读了几篇文章并尝试了所有解决方案，但在我的情况下没有任何效果。

我正在使用这种复杂的数据结构，需要将 DrawnObjects 数组存储在文件中。但是当它第一次对一个本身是一个结构类型数组的变量进行编码时，它就崩溃了。有什么帮助吗？

[_SwiftValue encodeWithCoder:]：无法识别的选择器发送到实例 0x1702668c0

enum ArchiverKeys : String
{
    case imageView = "ImageView"
    case stateArray = "StateArray"
    case bezierPathArray = "BezierPathArray"
    case reactangleArray = "ReactangleArray"
    case deleted = "Deleted"
}
   struct RectanglePath {
        var point1: CGPoint
        var point2: CGPoint
        var point3: CGPoint
        var point4: CGPoint
    }

    struct StateObject {
        var isAdd = true
        var path  = String()
    }

    class DrawObject: NSObject , NSCoding {

        var ImageView = UIImageView()
        var arrStates = [StateObject]()
        var arrBezierPaths = [UIBezierPath]()
        var rects = [RectanglePath]()
        var deleted = false


        override init() {
            ImageView = UIImageView()
            arrStates = []
            arrBezierPaths = []
            rects = []
            deleted = false
        }

        func encode(with archiver: NSCoder) {
            archiver.encode(self.ImageView, forKey:ArchiverKeys.imageView.rawValue )
            archiver.encode(self.arrStates, forKey: ArchiverKeys.stateArray.rawValue)
            archiver.encode(self.arrBezierPaths, forKey:ArchiverKeys.bezierPathArray.rawValue )
            archiver.encode(self.rects, forKey: ArchiverKeys.reactangleArray.rawValue)
            archiver.encode(self.deleted, forKey: ArchiverKeys.deleted.rawValue)
        }

        required convenience init(coder unarchiver: NSCoder) {

            self.init()

            self.ImageView      = unarchiver.decodeObject(forKey: ArchiverKeys.imageView.rawValue) as! UIImageView
            self.arrStates      = unarchiver.decodeObject(forKey: ArchiverKeys.stateArray.rawValue) as! [StateObject]
            self.arrBezierPaths = unarchiver.decodeObject(forKey: ArchiverKeys.bezierPathArray.rawValue) as! [UIBezierPath]
            self.rects          = unarchiver.decodeObject(forKey: ArchiverKeys.reactangleArray.rawValue) as! [RectanglePath]
            self.deleted        = (unarchiver.decodeObject(forKey: ArchiverKeys.deleted.rawValue) != nil)
        }
    }

    func saveArrayTo(_ directoryName: String , arrayToSave: NSArray) {

     //   let encodedData = NSKeyedArchiver.archivedData(withRootObject: arrayToSave)
      NSKeyedArchiver.archiveRootObject(arrayToSave, toFile: directoryName)
    }

     func loadArrayFrom(_ directoryName: String ) -> NSArray? {
        let result = NSKeyedUnarchiver.unarchiveObject(withFile: directoryName)
        return result as? NSArray
    }
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1 回答 1

3

您不能开箱即用地编码 Swift 结构，您必须添加计算属性和init方法以使结构属性列表兼容

struct StateObject {
    var isAdd = true
    var path  = ""

    init(propertyList : [String:Any]) {
        self.isAdd = propertyList["isAdd"] as! Bool
        self.path = propertyList["path"] as! String
    }

    var propertyListRepresentation : [String:Any] {
        return ["isAdd" : isAdd, "path"  : path]
    }
}

现在您可以归档数组

archiver.encode(self.arrStates.map{$0.propertyListRepresentation}, forKey: ArchiverKeys.stateArray.rawValue)

并取消归档

let states = unarchiver.decodeObject(forKey: ArchiverKeys.stateArray.rawValue) as! [[String:Any]]
self.arrStates = states.map { StateObject(propertyList: $0) }

或者StateObject保持不变并且

  • 在encode(with替换行

    archiver.encode(self.arrStates, forKey: ArchiverKeys.stateArray.rawValue)

    和

    let arrStatesAsPlist = arrStates.map { return ["isAdd" : $0.isAdd, "path" : $0.path] }
archiver.encode(arrStatesAsPlist, forKey:ArchiverKeys.stateArray.rawValue)

  • 在init(coder替换行

    archiver.encode(self.arrStates, forKey: ArchiverKeys.stateArray.rawValue)

    和

    let arrStatesAsPlist = unarchiver.decodeObject(forKey: ArchiverKeys.stateArray.rawValue) as! [[String:Any]]
arrStates = arrStatesAsPlist.map { StateObject(isAdd: $0["isAdd"] as! Bool, path: $0["path"] as! String) }

笔记：

  • 由于您为所有属性分配默认值，因此您可以删除整个init()方法和init().init(coder

  • 不要NSArray在 Swift 中使用。使用本机Array

  • 归档 UI 元素（如UIImageView. 存档图像数据。

于 2017-05-25T06:19:37.790 回答