Arrays Swift 4 Json编码和解码
下面是我获取完整Json的代码Arrays Swift 4 Json编码和解码,arrays,json,swift4,jsonparser,Arrays,Json,Swift4,Jsonparser,下面是我获取完整Json的代码 var str = "Hello" var dictionary = ["key1":"val1", "key2":"val2", "key3":"val3"] var products = [Product]() struct Product: Codable { var title: String var reference: String } func createProducts(title: String, refer: Strin
var str = "Hello"
var dictionary = ["key1":"val1", "key2":"val2", "key3":"val3"]
var products = [Product]()
struct Product: Codable {
var title: String
var reference: String
}
func createProducts(title: String, refer: String) {
products.append(Product(title: title, reference: refer))
}
for element in dictionary {
createProducts(title: element.key, refer: element.value)
}
var general = [str: products]
let encodedData = try? JSONEncoder().encode(general)
let json = String(data: encodedData!, encoding: .utf8)!
print(json)
我的口述如下:
{"Hello":[{"title":"key2","reference":"val2"},{"title":"key3","reference":"val3"},{"title":"key1","reference":"val1"}]}
在解码Json之后,我只需要得到这一部分
[{"title":"key2","reference":"val2"},{"title":"key3","reference":"val3"},{"title":"key1","reference":"val1"}]
我对下面的解码器有问题,为了得到“Hello”的值
编码的JSON的实际类型是
[String:[Product]]
,因此对其进行解码并获取Hello
do {
let decodedData = try JSONDecoder().decode([String:[Product]].self, from: Data(json.utf8))
print(decodedData["Hello"]!)
} catch {
print(error)
}
或者创建一个伞形Root
struct
struct Root : Decodable {
private enum CodingKeys : String, CodingKey { case hello = "Hello" }
let hello : [Product]
}
并对其进行解码
do {
let decodedData = try JSONDecoder().decode(Root.self, from: Data(json.utf8))
print(decodedData.hello)
编码的JSON的实际类型是
[String:[Product]]
,因此对其进行解码并获取Hello
do {
let decodedData = try JSONDecoder().decode([String:[Product]].self, from: Data(json.utf8))
print(decodedData["Hello"]!)
} catch {
print(error)
}
或者创建一个伞形Root
struct
struct Root : Decodable {
private enum CodingKeys : String, CodingKey { case hello = "Hello" }
let hello : [Product]
}
并对其进行解码
do {
let decodedData = try JSONDecoder().decode(Root.self, from: Data(json.utf8))
print(decodedData.hello)