(Swift 2) JSON: Miscellaneous Operations

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    let json = CkoJsonObject()
    json.EmitCompact = false

    // Assume the file contains the data as shown above..
    var success: Bool = json.LoadFile("qa_data/json/sample2.json")
    if success != true {
        print("\(json.LastErrorText)")
        return
    }

    // First navigate to the "sampleData" object:
    var sampleData: CkoJsonObject? = json.ObjectOf("sampleData")

    // Demonstrate BoolAt and BoolOf
    print("hungry: \(sampleData!.BoolOf("hungry"))")
    print("hungry: \(sampleData!.BoolAt(2))")

    // StringOf returns the value as a string regardless of it's actual type:
    print("pi: \(sampleData!.StringOf("pi"))")
    print("answer: \(sampleData!.StringOf("answer"))")
    print("withoutValue: \(sampleData!.StringOf("withoutValue"))")
    print("hungry: \(sampleData!.StringOf("hungry"))")

    // Demonstrate IsNullOf / IsNullAt
    print("withoutValue is null? \(sampleData!.IsNullOf("withoutValue"))")
    print("withoutValue is null? \(sampleData!.IsNullAt(3))")
    print("apple is null? \(sampleData!.IsNullOf("apple"))")
    print("apple is null? \(sampleData!.IsNullAt(1))")

    // IntOf
    print("answer: \(sampleData!.IntOf("answer").intValue)")

    // SetNullAt, SetNullOf
    // Set "pi" to null
    success = sampleData!.SetNullAt(0)
    // Set "answer" to null
    success = sampleData!.SetNullOf("answer")

    // Show the changes:
    print("\(json.Emit())")

    // Restore pi and apple:
    success = sampleData!.SetNumberAt(0, value: "3.14")
    success = sampleData!.SetNumberOf("answer", value: "42")

    // Show the changes:
    print("\(json.Emit())")

    // Add a null value named "afterApple" just after "apple"
    success = sampleData!.AddNullAt(2, name: "afterApple")

    // Add a boolean value just after "pi"
    success = sampleData!.AddBoolAt(1, name: "afterPi", value: false)

    sampleData = nil

    // Examine the changes..
    print("\(json.Emit())")

}