JSONCodable is awesome, but sometimes we just need to quickly get value in a deepy nested JSON. In the same way I did for Dart How to resolve deep json object in Dart, let's make that in Swift.
See https://github.com/onmyway133/Omnia/blob/master/Sources/Shared/JSON.swift
public func resolve<T>(_ jsonDictionary: [String: Any], keyPath: String) -> T? { var current: Any? = jsonDictionary keyPath.split(separator: ".").forEach { component in if let maybeInt = Int(component), let array = current as? Array<Any> { current = array[maybeInt] } else if let dictionary = current as? JSONDictionary { current = dictionary[String(component)] } } return current as? T } So we can just resolve via key path
class JSONTests: XCTestCase { func test() { let json: [String: Any] = [ "outside": [ "object": [ "number": 1, "text": "hello" ], "arrayOfObjects": [ [ "number": 2, "text": "two" ], [ "number": 3, "text": "three" ] ], "arrayOfArrays": [ [ "one", "two", "three", "four" ], [ "five", "six", "seven" ] ] ] ] XCTAssertEqual(resolve(json, keyPath: "outside.object.number"), 1) XCTAssertEqual(resolve(json, keyPath: "outside.object.text"), "hello") XCTAssertEqual(resolve(json, keyPath: "outside.arrayOfObjects.1.number"), 3) XCTAssertEqual(resolve(json, keyPath: "outside.arrayOfArrays.1.1"), "six") } } Original post https://onmyway133.github.io/blog/How-to-easily-parse-deep-json-in-Swift/
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