(Swift 3,4,5...) Google Sheets - Read a Single Range

Reads the values stored in the range Sheet1!A1:B5 and returns them in the response.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example uses a previously obtained access token having permission for the 
    // Google Sheets scope.

    // In this example, Get Google Sheets OAuth2 Access Token, the access
    // token was saved to a JSON file.  This example fetches the access token from the file..
    let jsonToken = CkoJsonObject()!
    var success: Bool = jsonToken.loadFile("qa_data/tokens/googleSheets.json")
    if jsonToken.hasMember("access_token") == false {
        print("No access token found.")
        return
    }

    let http = CkoHttp()!
    http.authToken = jsonToken.string(of: "access_token")
    http.sessionLogFilename = "qa_output/sessionLog.txt"

    // Get the cells defined by the range A1:B5
    var jsonResponse: String? = http.quickGetStr("https://sheets.googleapis.com/v4/spreadsheets/spreadsheetId/values/Sheet1!A1:B5")
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    print("\(jsonResponse!)")

    let json = CkoJsonObject()!
    json.load(jsonResponse)

    // A sample response is shown below.
    // To generate the parsing source code for a JSON response, paste
    // the JSON into this online tool: Generate JSON parsing code

    // {
    //   "range": "Sheet1!A1:B5",
    //   "majorDimension": "ROWS",
    //   "values": [
    //     [
    //       "Item",
    //       "Cost"
    //     ],
    //     [
    //       "Wheel",
    //       "$20.50"
    //     ],
    //     [
    //       "Door",
    //       "$15"
    //     ],
    //     [
    //       "Engine",
    //       "$100"
    //     ],
    //     [
    //       "Totals",
    //       "$135.50"
    //     ]
    //   ]
    // }

    var i: Int
    var count_i: Int
    var j: Int
    var count_j: Int

    var range: String? = json.string(of: "range")
    var majorDimension: String? = json.string(of: "majorDimension")
    i = 0
    count_i = json.size(ofArray: "values").intValue
    while i < count_i {
        json.i = i
        j = 0
        count_j = json.size(ofArray: "values[i]").intValue
        while j < count_j {
            json.j = j
            var strVal: String? = json.string(of: "values[i][j]")
            j = j + 1
        }

        i = i + 1
    }


}