我在 UserDefault 中保存了一些值，我试图取回它，但我无法解码它，因为它一直返回 fatalError
func save(dataPass: FeaturedProperties) {
var saveArraData: [FeaturedProperties] = getAllData()
saveArraData.append(dataPass)
let encoder = JSONEncoder()
if let encoded = try? encoder.encode(saveArraData) {
defaults.set(encoded, forKey: key)
defaults.synchronize()
print("BOUNCEE CC) saveArraData \(encoded)")
}
}
func getAllData() -> [FeaturedProperties] {
if defaults.value(forKey: key) == nil {
let array = [FeaturedProperties]()
return array
}
if let objects = defaults.data(forKey: key) {
let decoder = JSONDecoder()
do {
let objectsDecoded = try decoder.decode([FeaturedProperties].self, from: objects)
print("BOUNCEE CC) objects \(objectsDecoded)")
return objectsDecoded
} catch let error {
fatalError(error.localizedDescription)
}
} else {
let array = [FeaturedProperties]()
return array
}
}
我能够打印数据但无法将其解码为 FeaturedProperties 任何帮助
返回的错误是
fatal keyNotFound(FeaturedPropertiesCodingKeys(stringValue: "type_id", intValue: nil), Swift.DecodingError.Context(codingPath: [_JSONKey(stringValue: "Index 0", intValue: 0)], debugDescription: "No value associated with key FeaturedPropertiesCodingKeys(stringValue: \"type_id\", intValue: nil) (\"type_id\").", underlyingError: nil)))
这是我的精选属性
struct FeaturedProperties: Codable {
var id: Int?
var title: String?
var desc: String?
var typeId: Int?
var subTypeId: Int?
var addressLine1: String?
var addressLine2: String?
var propertyPurposeId: Int?
var isFeatured: Int?
var securityDeposit: Int?
var locationId: Int?
var currency: String?
var price: String?
var pricePerSqm: String?
var leasableArea: String?
var plotSize: String?
var plotPlate: String?
var floorSize: String?
var builtUpArea: String?
var kitchenSize: String?
var yearBuilt: String?
var bathRoomNo: String?
var bedroomNo: String?
var toiletNo: String?
var floorTypeId: String?
var arePetAllowed: String?
var hasKitchen: Int?
var dateAvailable: String?
var status: Int?
var availabilityStatus: Int?
var banner: String?
var premium: Int?
var parkingOptions: String?
var landmarks: String?
var featuresAndAmenities: String?
var createdBy: Int?
var user: User?
var locationDetails: LocationDetails?
var noViews: Int?
var noClicks: Int?
var longitude: String?
var latitude: String?
var isSuspended: Int?
var createdAt: String?
var updatedAt: String?
var deletedAt: String?
var propertyImage: [SearchPropertyImage]?
enum FeaturedPropertiesCodingKeys: String, CodingKey {
case id
case title
case desc = "description"
case typeId = "type_id"
case subTypeId = "sub_type_id"
case addressLine1 = "address_line1"
case addressLine2 = "address_line2"
case propertyPurposeId = "property_purpose_id"
case isFeatured = "is_featured"
case securityDeposit = "security_deposit"
case locationId = "location_id"
case currency
case price
case pricePerSqm = "price_per_sqm"
case leasableArea = "leasable_area"
case plotSize = "plot_size"
case plotPlate = "plot_plate"
case floorSize = "floor_size"
case builtUpArea = "built_up_area"
case kitchenSize = "kitchen_size"
case yearBuilt = "year_built"
case bathRoomNo = "bathroom_no"
case bedroomNo = "bedroom_no"
case toiletNo = "toilet_no"
case floorTypeId = "floor_type_id"
case arePetAllowed = "are_pet_allowed"
case hasKitchen = "has_kitchen"
case dateAvailable = "date_available"
case status
case availabilityStatus = "availability_status"
case banner
case premium
case parkingOptions
case landmarks
case featuresAndAmenities = "features_and_amenities"
case createdBy = "created_by"
case locationDetails = "location_details"
case noViews = "no_views"
case noClicks = "no_clicks"
case longitude
case latitude
case isSuspended = "is_suspended"
case createdAt = "created_at"
case updatedAt = "updated_at"
case deletedAt = "deleted_at"
case propertyImage = "property_image"
}
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: FeaturedPropertiesCodingKeys.self)
id = try container.decode(Int.self, forKey: .id)
title = try container.decodeIfPresent(String.self, forKey: .title)
desc = try container.decodeIfPresent(String.self, forKey: .desc)
typeId = try container.decode(Int.self, forKey: .typeId)
subTypeId = try container.decode(Int.self, forKey: .subTypeId)
addressLine1 = try container.decodeIfPresent(String.self, forKey: .addressLine1)
addressLine2 = try container.decodeIfPresent(String.self, forKey: .addressLine2)
propertyPurposeId = try container.decode(Int.self, forKey: .propertyPurposeId)
isFeatured = try container.decode(Int.self, forKey: .isFeatured)
securityDeposit = try container.decode(Int.self, forKey: .securityDeposit)
locationId = try container.decode(Int.self, forKey: .locationId)
currency = try container.decodeIfPresent(String.self, forKey: .currency)
price = try container.decodeIfPresent(String.self, forKey: .price)
pricePerSqm = try container.decodeIfPresent(String.self, forKey: .pricePerSqm)
leasableArea = try container.decodeIfPresent(String.self, forKey: .leasableArea)
plotSize = try container.decodeIfPresent(String.self, forKey: .plotSize)
plotPlate = try container.decodeIfPresent(String.self, forKey: .plotPlate)
floorSize = try container.decodeIfPresent(String.self, forKey: .floorSize)
builtUpArea = try container.decodeIfPresent(String.self, forKey: .builtUpArea)
kitchenSize = try container.decodeIfPresent(String.self, forKey: .kitchenSize)
yearBuilt = try container.decodeIfPresent(String.self, forKey: .yearBuilt)
bathRoomNo = try container.decodeIfPresent(String.self, forKey: .bathRoomNo)
bedroomNo = try container.decodeIfPresent(String.self, forKey: .bedroomNo)
toiletNo = try container.decodeIfPresent(String.self, forKey: .toiletNo)
floorTypeId = try container.decodeIfPresent(String.self, forKey: .floorTypeId)
arePetAllowed = try container.decodeIfPresent(String.self, forKey: .arePetAllowed)
hasKitchen = try container.decode(Int.self, forKey: .hasKitchen)
dateAvailable = try container.decodeIfPresent(String.self, forKey: .dateAvailable)
status = try container.decode(Int.self, forKey: .status)
availabilityStatus = try container.decode(Int.self, forKey: .availabilityStatus)
banner = try container.decodeIfPresent(String.self, forKey: .banner)
premium = try container.decode(Int.self, forKey: .premium)
parkingOptions = try container.decodeIfPresent(String.self, forKey: .parkingOptions)
landmarks = try container.decodeIfPresent(String.self, forKey: .landmarks)
featuresAndAmenities = try container.decodeIfPresent(String.self, forKey: .featuresAndAmenities)
createdBy = try container.decode(Int.self, forKey: .createdBy)
noViews = try container.decode(Int.self, forKey: .noViews)
noClicks = try container.decode(Int.self, forKey: .noClicks)
longitude = try container.decodeIfPresent(String.self, forKey: .longitude)
latitude = try container.decodeIfPresent(String.self, forKey: .latitude)
isSuspended = try container.decode(Int.self, forKey: .isSuspended)
createdAt = try container.decodeIfPresent(String.self, forKey: .createdAt)
locationDetails = try container.decodeIfPresent(LocationDetails.self, forKey: .locationDetails)
updatedAt = try container.decodeIfPresent(String.self, forKey: .updatedAt)
deletedAt = try container.decodeIfPresent(String.self, forKey: .deletedAt)
propertyImage = try container.decodeIfPresent([SearchPropertyImage].self, forKey: .propertyImage)
}
}
最佳答案
你的解码过程中有明显的错误。例如，typeId 是可选的，但您使用的是 decode 而不是 decodeIfPresent。为了防止错误，让编译器为你生成一切:
struct FeaturedProperties: Codable {
var id: Int?
var title: String?
var desc: String?
var typeId: Int?
var subTypeId: Int?
var addressLine1: String?
var addressLine2: String?
var propertyPurposeId: Int?
var isFeatured: Int?
var securityDeposit: Int?
var locationId: Int?
var currency: String?
var price: String?
var pricePerSqm: String?
var leasableArea: String?
var plotSize: String?
var plotPlate: String?
var floorSize: String?
var builtUpArea: String?
var kitchenSize: String?
var yearBuilt: String?
var bathRoomNo: String?
var bedroomNo: String?
var toiletNo: String?
var floorTypeId: String?
var arePetAllowed: String?
var hasKitchen: Int?
var dateAvailable: String?
var status: Int?
var availabilityStatus: Int?
var banner: String?
var premium: Int?
var parkingOptions: String?
var landmarks: String?
var featuresAndAmenities: String?
var createdBy: Int?
var user: User?
var locationDetails: LocationDetails?
var noViews: Int?
var noClicks: Int?
var longitude: String?
var latitude: String?
var isSuspended: Int?
var createdAt: String?
var updatedAt: String?
var deletedAt: String?
var propertyImage: [SearchPropertyImage]?
}
就够了。
当然，您可以添加 CodingKeys 以进行可选覆盖，但如果您的唯一目标是将驼峰式标识符转换为下划线，则可以在 JSON 解码器/编码器上使用 key 解码策略，例如
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
如果你想使用自定义编码键，枚举必须被称为CodingKeys，例如
private enum CodingKeys: String, CodingKey {
case typeId = "type_id"
}
关于swift - 无法解码数据 Swift，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57312781/