如何转到nskeyedunarchiver.unarchiveobject

Question

我有一个有效但已弃用的工作代码：

这部分很好：

 let archived = try? NSKeyedArchiver.archivedData(withRootObject: [defaultRecord] as NSArray, requiringSecureCoding: false)

this this debecectect：

let records = NSKeyedUnarchiver.unarchiveObject(with: unarchivedObject as Data) as? [Record] ios 12.0中对'nunarchiveObject（与:)'弃用：使用 +unarchivedObjectOfClass：fromData：错误：而不是

nots and nyt the，我找不到一种使用建议方法的方法，而我尝试的每种组合都不会出现错误。

任何工作示例？

新API用来存档数组有点棘手。 如果您不忽略

try?

Answer 1

的错误，您本可以自己弄清楚的

要能够用自定义类的数组来解码

unarchivedObject(ofClasses:from:

plural

form

NSArray

并指定

NSSecureCoding

（！）和自定义类。此外，您的班级必须采用

class Record : NSObject, NSSecureCoding {

   static var supportsSecureCoding: Bool {
        return true
    }

....

do {
    let archived = try NSKeyedArchiver.archivedData(withRootObject: [defaultRecord], requiringSecureCoding: false)

    let records = try NSKeyedUnarchiver.unarchivedObject(ofClasses: [NSArray.self, Record.self], from: archived) as! [Record]
    print(records)
} catch { print(error) }

defaultRecord

但是，为什么您将cartive cartive cartive cartive cartive cartive？如果您存档单个对象，则可以离开班级，然后写

do {
    let archived = try NSKeyedArchiver.archivedData(withRootObject: defaultRecord, requiringSecureCoding: false)

    let record = try NSKeyedUnarchiver.unarchivedObject(ofClass: Record.self, from: archived)
    let records = [record]
    print(records)
} catch { print(error) }

方注意：考虑使用

Codable

序列化。它是

swiftier

，不需要继承

NSObject

。

上面的方法对我不合理，我做到了，它起作用了：

NSKeyedUnarchiver.unarchivedObject(ofClasses: [Record.self], from: archived) 如果有人对

Objective C

Answer 2

// pointer to storage for error message
NSError *error = nil;

// read data from "dataPath" location
NSData *codedData = [[NSData alloc] initWithContentsOfFile:dataPath];

// create a set of root class (the array) and the data object class
NSSet<Class> *classes = [NSSet setWithObjects:NSArray.class, Record.class, nil];

// read using classes, not only single class
NSArray *data = [NSKeyedUnarchiver unarchivedObjectOfClasses:classes fromData:codedData error:&error];

，这只是代码@Vadian正确指出的“翻译”（并保存了我的一天！）。
    

Answer 3

我使用此解决方案将逻辑保持原样，并隐藏警告：

func clone<T: UIView>() throws -> T {
    let data = try NSKeyedArchiver.archivedData(withRootObject: self, requiringSecureCoding: false)
    let unarchiver = try NSKeyedUnarchiver(forReadingFrom: data)
    unarchiver.requiresSecureCoding = false
    return try unarchiver.decodeTopLevelObject(of: T.self, forKey: "root")
}

do {
      return try NSKeyedUnarchiver(forReadingFrom: unarchivedObject as Data) as? [Record]
   } catch {
      return nil
   }

Just使用Initfunc

Answer 4

XCODE 14 +ios16

Answer 5

guard
    let archivedRecord = try? NSKeyedArchiver.archivedData(withRootObject: defaultRecord, requiringSecureCoding: false),
    let record = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(archivedRecord) as? Record
else { return nil }