(Swift 3,4,5...) Demonstrates how to Handle Large Integers in JSON

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Demonstrates how to handle large integers in JSON. (Integers larger than what can fit in a 32-bit signed integer.)

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func chilkatTest() {
    // Let's say your JSON has this:

    // {
    // 	"id": 20000000001234567
    // }

    let json = CkoJsonObject()!

    var success: Bool = json.loadFile("qa_data/json/large_int.json")
    if success == false {
        print("\(json.lastErrorText!)")
        return
    }

    // The integer is too large for a 32-bit signed integer that is returned by IntOf.
    // The result will be something that wrapped around and could be negative.
    // In this case it would be: -543893881
    var id: Int = json.int(of: "id").intValue
    print("id: \(id)")

    // The solution is to read the integer value as a string, and then use the features in your programming language
    // to convert from a string to a 64-bit integer.
    // 
    // Alternatively, you may wish to simply hold the value as a string.  If, for example, the integer simply references
    // an order ID, an account ID, etc., then there's no need to convert to an integer value.  You're not going to be doing
    // mathematical operations on it anyway.  This is usually the case for large integers -- they typically exist
    // in JSON as an account ID.

    // You can get any JSON value as a string:
    var accountId: String? = json.string(of: "id")
    print("accountId: \(accountId!)")

    // Sample output:

    // id: -543893881
    // accountId: 20000000001234567

}