【发布时间】：2016-08-24 07:21:30
【问题描述】：
我想在 swift 中使用 NSKeyedArchiver 将任何类（例如，让数组 = 症状模型）类型的数组保存到设备中。
如果SymbolsModel类包含所有原始数据类型的变量，我知道如何保存数组，但如果还包含任何其他类的数组作为其属性，我不知道如何保存
下面我已经在示例的帮助下解释了我的问题，请仔细阅读并提供解决方案。 我有课
class SymptomsModel: NSObject, NSCoding ,ResponseJSONObjectSerializable {
var slug:String?
var name:String?
var images:[Sym_images]?
var videos:[Sym_videos]?
struct Keys {
static let Name = "name"
static let Slug = "slug"
static let Images = "images"
static let Videos = "videos"
}
required init(json:SwiftyJSON.JSON) {
self.slug = json["slug"].string
self.name = json["name"].string
self.images = [Sym_images]()
if let imagesJSON = json["images"].array {
for(imagesJSON) in imagesJSON {
if let newImages = Sym_images(json: imagesJSON){
self.images?.append(newImages)
}
}
}
self.videos = [Sym_videos]()
if let videosJSONArray = json["videos"].array {
for(videosJSON) in videosJSONArray {
if let newVideos = Sym_videos(json: videosJSON){
self.videos?.append(newVideos)
}
}
}
}
init(dictionary: [String : AnyObject]) {
self.name = dictionary[Keys.Name] as? String
self.slug = dictionary[Keys.Slug] as? String
self.images = dictionary[Keys.Images] as? [Sym_acc_images_objects]
self.videos = dictionary[Keys.Videos] as? [Sym_acc_videos_objects]
}
func encodeWithCoder(archiver: NSCoder) {
archiver.encodeObject(name, forKey: Keys.Name)
archiver.encodeObject(slug, forKey: Keys.Slug)
archiver.encodeObject(images, forKey: Keys.Images)
archiver.encodeObject(videos, forKey: Keys.Videos)
}
required init(coder unarchiver: NSCoder) {
super.init()
name = unarchiver.decodeObjectForKey(Keys.Name) as? String
slug = unarchiver.decodeObjectForKey(Keys.Slug) as? String
self.images = unarchiver.decodeObjectForKey(Keys.Slug) as? [Sym_acc_images_objects]
self.videos = unarchiver.decodeObjectForKey(Keys.Slug) as? [Sym_acc_videos_objects]
}
还有一个 PersistanceManager 类，用 NskeyedArchiver 将数据保存为
class PersistenceManager {
class private func documentsDirectory() -> NSString {
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let documentDirectory = paths[0] as String
return documentDirectory
}
class func saveNSArray(arrayToSave: NSArray, key: String) {
print(" saveNSArray key : \(key)")
let file = documentsDirectory().stringByAppendingPathComponent(key)
NSKeyedArchiver.archiveRootObject(arrayToSave, toFile: file)
}
class func loadNSArray(path: String) -> NSArray? {
print(" loadNSArray key : \(path)")
let file = documentsDirectory().stringByAppendingPathComponent(path)
let result = NSKeyedUnarchiver.unarchiveObjectWithFile(file)
return result as? NSArray
}
}
这是我保存然后检索数组的实现
class ViewController: UIViewController{
var ArraySymptom = [SymptomsModel]()
override func viewDidLoad() {
super.viewDidLoad()
ArraySymptom = loadArray()
//saving data in device
PersistenceManager.saveNSArray(ArraySymptom, key: "Symptom")
//loading data from device
if let value = PersistenceManager.loadNSArray("Symptom") as? [SymptomsModel] {
let images = value[0].images
print("images : \(images)")
let slug = value[0].slug
print("slug : \(slug)")
}
}
这里可以获取 slug 的值，但无法获取图像值。 这可能是因为 slug 是 String 类型而 Images 是 Custom Class 类型。 请建议我如何完成它。 是否可以使用 NSKeyedArchiver 保存这些类型的数组，这样我就可以通过从设备中检索 ArraySymptom 来访问图像值。
【问题讨论】：
标签： arrays swift nscoding nskeyedarchiver