NSKeyedUnarchiver.unarchiveObject 不工作 [重复]

Posted 2023-02-23

【中文标题】NSKeyedUnarchiver.unarchiveObject 不工作 [重复]

【英文标题】：NSKeyedUnarchiver.unarchiveObject not working [duplicate]

【发布时间】：2017-03-05 12:29:28

【问题描述】：

NSKeyedArchiver.archiveRootObject 被调用，但 getter 将变量 'a' 返回为 nil。这让我很烦。

有人知道这里有什么问题吗？

let url = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("Information.ab")

var info: Information? 
        get 
            let a = NSKeyedUnarchiver.unarchiveObject(withFile: url.absoluteString) as? Information
            return a
        
        set 
            if info != newValue && newValue != nil 
                NSKeyedArchiver.archiveRootObject(newValue as Any, toFile: url.absoluteString)
            
        
    

class Information: RecordModel 

    let rules: CKAsset
    let aboutUs: String
    let terms: String
    let privacyPolicy: String

    override init(record: CKRecord) 
        rules = record["rules"] as! CKAsset
        aboutUs = record["aboutUs"] as! String
        terms = record["terms"] as! String
        privacyPolicy = record["privacyPolicy"] as! String
        super.init(record: record)
    



class RecordModel: NSObject, NSCoding 

    let record: CKRecord

    init(record: CKRecord) 
        self.record = record
    

    required convenience init?(coder aDecoder: NSCoder) 
        let record = aDecoder.decodeObject(forKey: "keyRecord") as! CKRecord
        self.init(record: record)
    

    func encode(with aCoder: NSCoder) 
        aCoder.encode(record, forKey: "keyRecord")
    

    override func isEqual(_ object: Any?) -> Bool 
        if let rhs = object as? Information 
            return record.recordID == rhs.record.recordID
        
        return false
    

    override var hash: Int 
        return record.recordID.hashValue
    

【参考方案1】：

unarchiveObject(withFile 和 archiveRootObject(_:toFile 都期望文件 path 没有 file:// 方案，所以在这两种情况下都是

url.path

而不是url.absoluteString