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(Swift) Get the Root of a JSON DocumentDemonstrates how to get back to the JSON root object from anywhere in the JSON document. This example uses the following JSON document: { "flower": "tulip", "abc": { "x": [ { "a" : 1 }, { "b1" : 100, "b2" : 200 }, { "c" : 3 } ], "y": 200, "z": 200 } } Note: This example requires Chilkat v11.0.0 or greater.
func chilkatTest() { var success: Bool = false let json = CkoJsonObject()! var jsonStr: String? = "{\"flower\": \"tulip\",\"abc\":{\"x\": [{ \"a\" : 1 },{ \"b1\" : 100, \"b2\" : 200 },{ \"c\" : 3 }],\"y\": 200,\"z\": 200}}" success = json.load(jsonStr) if success == false { print("\(json.lastErrorText!)") return } // Get the "abc" object. let abcObj = CkoJsonObject()! success = json.objectOf2("abc", jsonObj: abcObj) if success == false { print("\(json.lastErrorText!)") return } // Side note: The JSON of a sub-part of the document can be emitted from any JSON object: abcObj.emitCompact = false print("\(abcObj.emit()!)") // Navigate to the "x" array let xArray = CkoJsonArray()! abcObj.arrayOf2("x", jarr: xArray) // Navigate to the 2nd object contained within the array. This contains members b1 and b2 let bObj = CkoJsonObject()! xArray.objectAt2(1, jsonObj: bObj) // Show that we're at "b1/b2". // The value of "b1" should be "200" print("b2 = \(bObj.int(of: "b2").intValue)") // Now go back to the JSON doc root: let docRoot = CkoJsonObject()! bObj.getDocRoot2(docRoot) // We'll skip the null check and assume it's non-null... // Pretty-print the JSON doc from the root to show that this is indeed the root. docRoot.emitCompact = false print("\(docRoot.emit()!)") } |
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