read a json file in swift

To read a JSON file in Swift, you can use the Codable protocol and the JSONDecoder class. Follow these steps:

Define a struct that represents the structure of the JSON file you want to read. The struct must conform to the Codable protocol.


main.swift
struct Response: Codable {
    let name: String
    let age: Int
}
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Get the URL of the JSON file.


main.swift
guard let url = Bundle.main.url(forResource: "myfile", withExtension: "json") else { return }
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Read the JSON data from the file.


main.swift
let data = try Data(contentsOf: url)
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Decode the JSON data into an instance of the struct using a JSONDecoder object.


main.swift
let decoder = JSONDecoder()
let response = try decoder.decode(Response.self, from: data)
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Here's the complete code:


main.swift
struct Response: Codable {
    let name: String
    let age: Int
}

guard let url = Bundle.main.url(forResource: "myfile", withExtension: "json") else { return }

do {
    let data = try Data(contentsOf: url)
    let decoder = JSONDecoder()
    let response = try decoder.decode(Response.self, from: data)
    print(response.name)
    print(response.age)
} catch {
    print(error.localizedDescription)
}
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