I am currently working with an array of SwiftyJson data that has been declared and populated with relevant information. The code snippet used to populate the hoge array is as follows: self.hoge = JSON(data: data!)
However, I now need to add new SwiftyJSON data to this existing array. Upon inspection, it appears that the hoge array does not have an append property. How should I go about accomplishing this task?
Thank you in advance
SwiftyJSON lacks the append and extend functionality.
You have the option to:
self.hoge = JSON(self.hoge.arrayObject! + JSON(data: newData).arrayObject!)
However, it is advisable to define self.hoge as [JSON]
var hoge:[JSON] = []
func readMoreData() {
let newData: NSData = ...
if let newArray = JSON(data:newData).array {
self.hoge += newArray
}
}
An alternate method utilizing the power of Extensions
extension JSON{
mutating func appendIfArray(json:JSON){
if var arr = self.array{
arr.append(json)
self = JSON(arr);
}
}
mutating func appendIfDictionary(key:String,json:JSON){
if var dict = self.dictionary{
dict[key] = json;
self = JSON(dict);
}
}
}
Example Usage:
var myJSON: JSON = [
"myDictionary": [String:AnyObject](),
"myArray" : [1,2,3,4]
]
myJSON["myDictionary"].appendIfDictionary(key:"A", json: JSON(["key1":"value1"]))
myJSON["myDictionary"].appendIfDictionary(key: "B", json: JSON(["key2":"value2"]))
myJSON["myArray"].appendIfArray(json: JSON(5))
Output:
{
"myArray" : [
1,
2,
3,
4,
5
],
"myDictionary" : {
"B" : {
"key2" : "value2"
},
"A" : {
"key1" : "value1"
}
}
}
A helpful way to achieve this is by utilizing the merge function.
Check out this link for more information on how to use it.
var array: JSON = [1, 2, 3]
array = try! array.merged(with: [4])
// -> [1, 2, 3, 4]
let jsonData:JSON = JSON(newData)
var array:[JSON]=jsonObject.arrayValue
array.append(jsonData)
var combinedObject = JSON(array)
To update a SwiftyJSON array, I utilized the code above. Initially, I converted the new data into a JSON object. Subsequently, I accessed the existing JSON array and added the new JSON data. Finally, I transformed the array back into a JSON object. Admittedly, it may not be the most efficient code, but for my purposes, performance was not a concern as long as it accomplished the task.
To start, make sure to define your main JSON Array like this:
let jsonData: [JSON] = []
If the data source is a different object (such as realm), iterate over it using a for loop. However, if the data source is another JSON Array, execute the following method:
func setData(){
jsonData = []
if let items = dataSource.array {
for item in items {
jsonData.append(item)
}
}
collectionView.reloadData()
}
To ensure proper functionality, self.hoge must be either a Swift Array (mutable when declared as var) or converted to an NSMutableArray. If it is in Array format, use the append method. If converted to an NSMutableArray, utilize self.hoge.addObject(yourObject).
To incorporate a dictionary into the JSON data for my project, I followed the approach outlined in Daniel Krom's response above:
import SwiftyJSON
extension JSON {
mutating func addKeyValuePair(key: String, value: Any){
if var dict = self.dictionaryObject {
dict[key] = value
self = JSON(dict)
}
}
}
Implementation:
var jsonData: JSON = []
jsonData.addKeyValuePair(key: "newKey", value: "newValue")
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