如何在Swift中制作一个结构来解码JSON结构

Question

如何在swift中制作一个结构或类来解码以下类型的json结构？我想主要提取报表节点的数据！

{
"earliest": "2020-10-17",
"latest": "2020-10-28",
"report": {
"purchase": {
"total": 1458600.0,
"average": 121550.0,
"min": 600000.0,
"max": 1600.0
},
"sale": {
"total": 434250.0,
"average": 144750.0,
"min": 360000.0,
"max": 29250.0
},
"production": {
"total": 792030,
"average": 20308.46153846154,
"min": 12000,
"max": 29700
}
}
}

Answer 1

您只需要构建数据并使其符合Codable:

struct Root: Codable {
let earliest: String
let latest: String
let report: Report
}

---

struct Report: Codable {
let purchase: Results
let sale: Results
let production: Results
}

---

struct Results: Codable {
let total: Int
let average: Double
let min: Int
let max: Int
}

---

let json = """
{
"earliest": "2020-10-17",
"latest": "2020-10-28",
"report": {
"purchase": {
"total": 1458600.0,
"average": 121550.0,
"min": 600000.0,
"max": 1600.0
},
"sale": {
"total": 434250.0,
"average": 144750.0,
"min": 360000.0,
"max": 29250.0
},
"production": {
"total": 792030,
"average": 20308.46153846154,
"min": 12000,
"max": 29700
}
}
}
"""

do {
let report = try JSONDecoder().decode(Root.self, from: .init(json.utf8)).report
print("report", report)
} catch {
print(error)
}

report报告(购买：结果(总计：1458600，平均：121550.0，最小：600000，最大：1600(，销售：结果(合计：434250，平均：144750.0，最小值：360000，最大值：29250(，生产：结果(总数：792030，平均值：20308.46153846154，最小值12000，最大值29700(