ios - 如何解析嵌套的json？迅速

问题描述

我有一个本地 json 字符串，我正在尝试解析它，但是当我尝试这样做时，我不断收到错误消息。我也在嵌套字典中看到了这个错误，但找不到错误。下面是json字符串

let jsonNestedString  = "{\"meta\":{\"page\":1,\"total_pages\":4,\"per_page\":10,\"total_records\" : 38}, \"reweries\":[\"id\":1234,\"name\":\"saintArnold\"},{\"id\":52892,\"name\":\"buffalo bayou\"]}"

我正在通过 Codable 执行此过程，下面是我为此创建的结构

struct PagedBreweries:Codable{
    struct Meta:Codable{
        let page : Int
        let total_pages:Int
        let per_page:Int
        let total_records: Int
        enum CodingKeys: String, CodingKey{
            case page
            case total_pages
            case per_page
            case total_records
        }
    }

    struct Brewery :Codable{
        let id:Int
        let name:String

    }
    let meta:Meta
    let breweries :[Brewery]
}

然后将此数据解析为如下函数

    func jsonNested(){
    let jsonData = jsonNestedString.data(using: .utf8)
    let decoder = JSONDecoder()
    let data  = try! decoder.decode(PagedBreweries.Meta.self, from: jsonData!)
    print(data)
}

当我尝试构建时，我得到的错误出现在尝试中！decoder.decode
命令，错误是

线程 1：致命错误：“尝试！” 表达式意外引发错误：Swift.DecodingError.keyNotFound(CodingKeys(stringValue: "page", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: \" page\", intValue: nil) (\"page\").", underlyingError: nil))

任何人都可以提供解决方案吗？提前致谢

标签： iosjsonswiftapicodable

正确的 json

{
    "meta": {
        "page": 1,
        "total_pages": 4,
        "per_page": 10,
        "total_records": 38
    },
    "reweries": [{
    "id": 1234,
    "name": "saintArnold"
    },
    {
    "id": 52892,
    "name": "buffalo bayou"
    }
    ]
}

struct Root: Codable {
    let meta: Meta
    let reweries: [Rewery]
}

struct Meta: Codable {
    let page, totalPages, perPage, totalRecords: Int

    enum CodingKeys: String, CodingKey {  // snake case may be used 
        case age = "page"
        case totalPages = "total_pages"
        case perPage = "per_page"
        case totalRecords = "total_records"
    }
}

struct Rewery: Codable {
    let id: Int
    let name: String
}

  let jsonNestedString  = """
    {\"meta\":{\"page\":1,\"total_pages\":4,\"per_page\":10,\"total_records\":38}, \"reweries\":[{\"id\":1234,\"name\":\"saintArnold\"},{\"id\":52892,\"name\":\"buffalo bayou\"}]}
"""

  // or 

let jsonNestedString  = """

{
    "meta": {
        "page": 1,
        "total_pages": 4,
        "per_page": 10,
        "total_records": 38
    },
    "reweries": [{
    "id": 1234,
    "name": "saintArnold"
    },
    {
    "id": 52892,
    "name": "buffalo bayou"
    }
    ]
}


"""

do {

    let jsonData = jsonNestedString.data(using: .utf8)
    let decoder = JSONDecoder()
    let data  = try decoder.decode(Root.self, from: jsonData!)
    print(data)


} catch  {
    print(error)
}

ios - 如何解析嵌套的json？迅速

问题描述

解决方案

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