Swift 3 - Load JSON file

gistfile1.txt

        let filePath = Bundle.main.pathForResource("YOUR_FILE_NAME", ofType: "json", inDirectory: nil)

        if let filePath = filePath {
            do {
                let fileUrl = URL(fileURLWithPath: filePath)
                let jsonData = try Data(contentsOf: fileUrl, options: .mappedIfSafe)
                let json = try? JSONSerialization.jsonObject(with: jsonData)
            } catch {
                print(error)
                fatalError("Unable to read contents of the file url")
            }
        }

let filePath = Bundle.init(for: type(of: self)).path(forResource: "YOUR_FILE_NAME", ofType: "json")