将结构数组转换为json swift
我有一个需要写入服务器端代码的结构数组,我似乎找不到任何添加具有多个父键的json对象的示例将结构数组转换为json swift,swift,Swift,我有一个需要写入服务器端代码的结构数组,我似乎找不到任何添加具有多个父键的json对象的示例 struct Photo { var imageName = "", thumbFileURL = "", viewCount = 0, likeCount = 0 } 然后我有一对照片对象,声明为 var photo1 = Photo() photo1.imageName = "ImPhoto1" photo1.thumbFileURL = "www.SO.com" photo1.viewC
struct Photo {
var imageName = "", thumbFileURL = "", viewCount = 0, likeCount = 0
}
然后我有一对照片对象,声明为
var photo1 = Photo()
photo1.imageName = "ImPhoto1"
photo1.thumbFileURL = "www.SO.com"
photo1.viewCount = 5
photo1.likeCount = 1
var photo2 = Photo()
photo1.imageName = "ImPhoto2"
photo1.thumbFileURL = "www.SO.com"
photo1.viewCount = 10
photo1.likeCount = 2
////// and then same for x amount of Photo() object
然后我有一个数组
myArray = [photo1,photo2,photo3, ...]
然后我需要写一个json,看起来像这样:
myJson object = {
photo1: {
imageName: "ImPhoto1"
thumbFileURL = "www.SO.com"
viewCount: 5
likeCount: 1
},
photo2: {
imageName: "Imphoto2"
....
},
....
}
所以我的问题是,如何转换myarray
->myJson
struct Photo:Codable {
var imageName = "", thumbFileURL = "", viewCount = 0, likeCount = 0
}
var photo1 = Photo()
photo1.imageName = "ImPhoto1"
photo1.thumbFileURL = "www.SO.com"
photo1.viewCount = 5
photo1.likeCount = 1
var photo2 = Photo()
photo1.imageName = "ImPhoto2"
photo1.thumbFileURL = "www.SO.com"
photo1.viewCount = 10
photo1.likeCount = 2
var myArray = [photo1,photo2]
let tempData = try? JSONEncoder().encode(myArray)
//Create JSON
var Finaldata: Any?
if let data = tempData { Finaldata = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) }
这将起作用您需要一个自定义的
可编码
的实现,它是一组照片的包装类型:
struct Photo : Codable {
var imageName = "", thumbFileURL = "", viewCount = 0, likeCount = 0
}
struct PhotoCollection: Encodable, ExpressibleByArrayLiteral {
var photos: [Photo]
typealias ArrayLiteralElement = Photo
init(arrayLiteral elements: Photo...) {
photos = elements
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
for (i, photo) in photos.enumerated() {
try container.encode(photo, forKey: CodingKeys(stringValue: "photo\(i + 1)")!)
}
}
struct CodingKeys: CodingKey, ExpressibleByStringLiteral {
var stringValue: String { return key }
init?(stringValue: String) {
key = stringValue
}
var intValue: Int? { return Int(key) }
init?(intValue: Int) {
key = "\(intValue)"
}
init(stringLiteral value: String) {
key = value
}
var key: String
}
}
var photo1 = Photo()
photo1.imageName = "ImPhoto1"
photo1.thumbFileURL = "www.SO.com"
photo1.viewCount = 5
photo1.likeCount = 1
var photo2 = Photo()
photo1.imageName = "ImPhoto2"
photo1.thumbFileURL = "www.SO.com"
photo1.viewCount = 10
photo1.likeCount = 2
let photoCollection: PhotoCollection = [photo1, photo2]
let json = try JSONEncoder().encode(photoCollection)
print(String(data: json, encoding: .utf8)!)
这张照片是:
{"photo2":{"imageName":"","likeCount":0,"viewCount":0,"thumbFileURL":""},"photo1":{"imageName":"ImPhoto2","likeCount":2,"viewCount":10,"thumbFileURL":"www.SO.com"}}
格式:
{
"photo2": {
"imageName": "",
"likeCount": 0,
"viewCount": 0,
"thumbFileURL": ""
},
"photo1": {
"imageName": "ImPhoto2",
"likeCount": 2,
"viewCount": 10,
"thumbFileURL": "www.SO.com"
}
}
让tempData=try?JSONEncoder().encode(myArray)//创建JSON变量Finaldata:Any?如果let data=tempData{finalData=try?JSONSerialization.jsonObject(with:data,options:.allowFragments)}致命错误:数组不符合可编码的,因为照片不符合可编码的:很好!几乎,我该怎么做才能向数据中添加父键呢?像“Photo1”和“Photo2”键?你确定这是OP想要的吗?这会创建一个JSON数组,但OP需要一个JSON对象。@Cristik检查问题OP使用了相同的值这就是为什么如果我已经有一个照片数组,我如何将数组解码为PhotoCollection?我似乎无法运行代码:Photocollection:Photocollection=myarray..@RyanB。你想解码和编码吗?您的json看起来像什么?