(Swift 2) Loading and Parsing a JSON Array

A JSON array is JSON that begins with "[" and ends with "]". For example, this is a JSON array that contains 3 JSON objects.

[{"name":"jack"},{"name":"john"},{"name":"joe"}]

A JSON object, however, is JSON that begins with "{" and ends with "}". For example, this JSON is an object that contains an array.

{"pets":[{"name":"jack"},{"name":"john"},{"name":"joe"}]}

This example shows how loading a JSON array is different than loading a JSON object.

Chilkat Downloads for the Swift Programming Language

MAC OS X (Cocoa) Objective-C/Swift Libs

iOS Objective-C/Swift Libs

func chilkatTest() {
    var strJsonArray: String? = "[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]"

    var strJsonObject: String? = "{\"pets\":[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]}"

    // A JSON array must be loaded using JsonArray:
    let jsonArray = CkoJsonArray()
    jsonArray.Load(strJsonArray)

    // Examine the values:
    var i: Int = 0
    while i < jsonArray.Size.intValue {
        var jsonObj: CkoJsonObject? = jsonArray.ObjectAt(i)
        print("\(i): \(jsonObj!.StringOf("name"))")
        jsonObj = nil
        i = i + 1
    }

    // Output is:

    // 	0: jack
    // 	1: john
    // 	2: joe

    // A JSON object must be loaded using JsonObject
    let jsonObject = CkoJsonObject()
    jsonObject.Load(strJsonObject)

    // Examine the values:
    i = 0
    var numPets: Int = jsonObject.SizeOfArray("pets").intValue
    while i < numPets {
        jsonObject.I = i
        print("\(i): \(jsonObject.StringOf("pets[i].name"))")
        i = i + 1
    }

    // Output is:

    // 	0: jack
    // 	1: john
    // 	2: joe

}