On click of a submit button the data in my textfields and some other data are being converted to a json object like so…
let categoryName = self.categoryTextField.text
let categoryId = self.categoryID
let category_json: [String: [String:Any]] = [
"categoryDetails": [
"category_name": categoryName,
"category_id": categoryId
]
]
if let data = try? JSONSerialization.data(withJSONObject: category_json, options: .prettyPrinted),
let str = String(data: data, encoding: .utf8) {
print(str) // `str` gives the json object
self.categoryStrToPass = str
}
Now self.categoryStrToPass is assigned to another json object and then finally added to a string array like so…
let productID = self.prodID
let sellingPrice = self.mrpTextField.text
let categoryJSON = self.categoryStrToPass
let jsonObject: [String: [String:Any]] = [
"prodDetails": [
"product_id": productID,
"selling_price": sellingPrice,
“category_json”: categoryJSON
]
]
if let data = try? JSONSerialization.data(withJSONObject: jsonObject, options: .prettyPrinted),
let str = String(data: data, encoding: .utf8) {
print(str)
self.jsonStrToPass = str
self.jsonStringArray.append(self.jsonStrToPass)
}
Now I’m storing jsonStringArray to coredata like so…
_product?.setValue(self.jsonStringArray, forKey:
"productJsonArray") // productJsonArray is an attribute of type Transformable and Custom class type Array<String>
And it is being fetched like so...
if let jsonObjArr = result.value(forKey: "productJsonArray") as?
Array<NSString> {
print(jsonObjArr)
}
Now on 2 different instances I have submitted the data which means on printing jsonObjArr while fetching,it should have 2 different json objects in one array like so..
[{
"prodDetails" : {
"product_id" : "0",
"category_json" : "{\n \"categoryDetails\" : {\n \"category_id\" : \"0\",\n \"category_name\" : \"prodCAT\"\n }\n}",
"selling_price" : "500",
}
}
{
"prodDetails" : {
"product_id" : "1",
"category_json" : "{\n \"categoryDetails\" : {\n \"category_id\" : \"0\",\n \"category_name\" : \"CATNEW\"\n }\n}",
"selling_price" : "1000",
}
}]
But instead, printing jsonObjArr is giving this…in 2 different arrays like so...
[{
"prodDetails" : {
"product_id" : "0",
"category_json" : "{\n \"categoryDetails\" : {\n \"category_id\" : \"0\",\n \"category_name\" : \"prodCAT\"\n }\n}",
"selling_price" : "500",
}
}]
[{
"prodDetails" : {
"product_id" : "1",
"category_json" : "{\n \"categoryDetails\" : {\n \"category_id\" : \"0\",\n \"category_name\" : \"CATNEW\"\n }\n}",
"selling_price" : "1000",
}
}]
How can I get multiple json objects in one single array...?
you can add objects of type [String: Any] to array like so
let firstCategoryName = "first"
let firstCategoryId = 1
let firstCategory = [
"category_name": firstCategoryName,
"category_id": firstCategoryId
] as [String : Any]
let secondCategoryName = "second"
let secondCategoryId = 2
var category_json = [[String:Any]]()
category_json.append(firstCategory)
let secondCategory = [
"category_name": secondCategoryName,
"category_id": secondCategoryId
] as [String : Any]
category_json.append(secondCategory)
print(category_json)
then serialize the array
Swift 4.0:
let firstObj = ["prodDetails": [
"product_id": 5,
"selling_price": 6,
]]
let secondObj = ["prodDetails1": [
"product_id1": 5,
"selling_price1": 6,
]]
let jsonObject = jsonStringArray.addingObjects(from: [firstObj,secondObj])
if let data = try? JSONSerialization.data(withJSONObject: jsonObject, options: .prettyPrinted),
let str = String(data: data, encoding: .utf8) {
print(str) //prints array of dictionaries
}
category_json and jsonObject are of the same kind.
What you need to understand:
(NS)String <== String(data:encoding) or data(encoding:) ==> (NS)Data
Applied to specific String/Data: JSON:
JSON Stringified <== String(data:encoding) or data(encoding:) ==> JSON Data
Swift Array/ Swift (and the rest JSON compliant) <== (NS)JSONSerialization.jsonObject(withData:, options:) or (NS)JSONSerialization.data(withJSONObject:, options:) ==> JSON Data
You can't append like that the two JSON Stringified, you need to have an array at least at top level.
So, let's connect the dots, in pseudo code (not sure at all that the method name are error free)
let currentData = self.jsonStrToPass.data(encoding: .utf8)
let current = JSONSerialization.jsonObject(with:currentData, options:[]) as [String:[String:Any]]
let finalArray : [[String:[String:Any]]]()
finalArray.append(current)
finalArray.append(jsonObject)
let finalData = JSONSerialization.data(withJSONObject:finalArray, options:[])
let finalString = String(data:finalData, encoding:.utf8)
That's for the logic. I didn't do the if let, try/catch, etc.
I'd think it might be better to pass Any (for Swift Array/Dictionary instead of String) between your data to pass. It might be simpler to edit them (append, etc.) instead of String.
Related
I need to create a dictionary from array with custom type for first index of the array.
Sample array : ["ABC","ZYZ","123"]
Required result : [{"name" : "ABC", "type:"A"},{"name" : "ZYZ", "type:"B"},{"name" : "123", "type:"B"}]
Note type A for first index.
My code
for url in urlArray {
urlDict["name"] = url
}
You can do a map, and then individually change the type of the first dictionary:
var dicts = urlArray.map { ["name": $0, "type": "B"] }
dicts[0]["type"] = "A"
Seeing how all your dictionary keys are all the same, and that you are sending this to a server, a Codable struct might be a better choice.
struct NameThisProperly : Codable {
var name: String
var type: String
}
var result = urlArray.map { NameThisProperly(name: $0, type: "B") }
result[0].type = "A"
do {
let data = try JSONDecoder().encode(result)
// you can now send this data to server
} catch let error {
...
}
I suppose you can use a high order function such as map or reduce
Here is an example using reduce
var array = ["ABC","ZYZ","123"]
var result = array.reduce([[String: String]](), { (previous, current) -> [[String: String]] in
let type = previous.count == 0 ? "A" : "B"
let dictForCurrent = [
"name": current,
"type": type
]
return previous + [dictForCurrent]
})
print(result)
The result:
[["type": "A", "name": "ABC"], ["type": "B", "name": "ZYZ"], ["name":
"123", "type": "B"]]
Use reduce to convert array to dictionary:
let resultDict: [String: String]
= array.reduce(into: [:]) { dict, url in
dict["name"] = url
}
The result will look like:
[
"name": URL1,
"name": URL2
]
Use map(_:) to convert each element of the array to dictionary like so,
let arr = ["ABC","ZYZ","123"]
let result = arr.map { (element) -> [String:String] in
var dict = [String:String]()
dict["name"] = element
if let char = element.first {
dict["type"] = String(char)
}
return dict
}
print(result)
since you are concern about the index, my approach will be using enumerated() which gives out the index
let array = ["ABC","ZYZ","123"]
var results: [[String: String]] = []
for (i, content) in array.enumerated() {
let type: String = i == 0 ? "A" : "B"
results.append(["name": content, "type": type])
}
print(result)
// [["type": "A", "name": "ABC"], ["name": "ZYZ", "type": "B"], ["type": "B", "name": "123"]]
How to convert json into dictionary for POST api call Swift
info contains an array of object that have User and Address keys You need
let dict1 : [String:Any] = ["ID" : "User123", "Name" : "Virat", "UserID" : 0]
let dict2 : [String:Any] = ["city" : "Delhi", "pin" : 123]
let addressDict : [String:Any] = ["User" : dict1,"Address" : dict2]
let infoDict : [String:Any] = ["info" :[addressDict]]
To better understand look to
// MARK: - Empty
struct Empty: Codable {
let info: [Info]
}
// MARK: - Info
struct Info: Codable {
let user: User
let address: Address
enum CodingKeys: String, CodingKey {
case user = "User"
case address = "Address"
}
}
// MARK: - Address
struct Address: Codable {
let city: String
let pin: Int
}
// MARK: - User
struct User: Codable {
let id, name: String
let userID: Int
enum CodingKeys: String, CodingKey {
case id = "ID"
case name = "Name"
case userID = "UserID"
}
}
You can also use the models above and convert the model to Data with JSONEncodable
The issue is that you're adding user and address as separate dictionaries on the array.
The JSON you posted has an array for info key but its ONE dictionary with two keys.
You need to combine the address and user dicts into one declaration and then wrap that in an array.
For ex:
let dict1 : [String:Any] = ["ID" : "User123", "Name" : "Virat", "UserID" : 0]
let dict2 : [String:Any] = ["city" : "Delhi", "pin" : 123]
let dicts : [String:Any] = ["User": dict1, "Address" : dict2]
let arr = [dicts]
let infoDict : [String:Any] = ["info" : arr]
EDIT: I would agree with SH_Khan that a much better way of doing this would be to create a Codable model
The issue is you are make dictionary per object.
try this code:
let userDict : [String:Any] = ["ID" : "User123", "Name" : "Virat", "UserID" : 0]
let addressDict : [String:Any] = ["city" : "Delhi", "pin" : 123]
let infoDict : [String:Any] = ["info" : ["User": addressDict, "Address": addressDict]]
Try this:
func getDictionaryFromString(_ json: String) -> [String: Any]? {
if let data = json.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}
override func viewDidLoad() {
super.viewDidLoad()
let json = """
{"info": [{
"User": {"ID": "user123",
"Name": "Virat",
"UserID": 0
},
"Address": {"city": "Delhi",
"pin": 123
}
}
]
}
"""
if let dict = getDictionaryFromString(json) {
print(dict["info"] as! NSArray)
}
}
//Printed:
> (
> {
> Address = {
> city = Delhi;
> pin = 123;
> };
> User = {
> ID = user123;
> Name = Virat;
> UserID = 0;
> };
> } )
I have array of dictionaries.
>[{"name": "John",
"address":
{"home": "addr1",
"work": "add2"}
},
{"name": "Anu",
"address": {"home": "addr1",
"work": "add2"}
}]
I am saving it to user default like this -
let personsData1 = ["name": "John", "address": {"home": "addr1", "work": "add2"}] as [String : Any]
let personsData2 = ["name": "Anu", "address": {"home": "addr1", "work": "add2"}] as [String : Any]
var persons = [personsData, personsData1]
UserDefaults.standard.set(forKey: "persons")
Retrieving it in another method and filter them on the basis of name.
let name = "John"
Getting below error
Cannot invoke 'filter' with an argument list of type '((Any?) -> Bool)'
Here is the code :-
func test () {
let personData1 = ["name": "John", "addresses": ["home":"addr1", "work": "addr2"]] as [String : Any]
let personData2 = ["name": "And", "addresses": ["home":"addr1", "work": "addr2"]] as [String : Any]
let persons = [personData1, personData2]
(UserDefaults.standard.set(persons, forKey: "persons")
print("Saved ----\(UserDefaults.standard.value(forKey: "persons"))")
if let savedPersons = UserDefaults.standard.value(forKey: "persons") {
let namePredicate = NSPredicate(format: "name like %#", name);
var filteredArray: [[String:Any]] = savedPersons.filter { namePredicate.evaluate(with: $0) }
print("names = \(filteredArray)")
}
}
If I try to filter like this -
let filteredArray = savedBrs.filter { $0["name"] == name }
getting different error -
Value of type 'Any' has no member 'filter'
With NSPredicate
let arr = [["name":"Rego","address":["one":"peek","two":"geelo"]],["name":"pppp","address":["one":"peek","two":"geelo"]]]
let neededName = "Rego"
let pre = NSPredicate(format: "name == %#",neededName)
let result = arr.filter { pre.evaluate(with:$0) }
print(result)
Without NSPredicate
let result = arr.filter { $0["name"] as? String == neededName }
I have to deliver some specific JSON to a webserver, but I'm very confused about how to use the correct arrays and dictionaries, so I can't get to my final result. I'm starting from this:
["entries": [
"member" : [
"id" : key,
"name" : value
],
"timestamp" : "\(dateString)"
]
]
in the JSON file I have to send to the server I can only have 1 "entries" and several "member" with specific "id" and "name" and timestamp. I'm aware that I have to use dictionaries but can't get to this result. This is what I tried so fare:
var leden = [Int: String]()
var jsonDict = [String: Any]()
var dateString = Date()
for (key, value) in leden{
jsonDict["\(key)"] = ["member" : [
"id" : key,
"naam" : value
],
"timestamp" : "\(dateString)"
]
}
jsonFinaal = ["entries": jsonDict]
this is as close as I could get, but good enough because the key in jsonDict should not be there, I added the "entries" in a second dictionary to make this a unique entry.
Anyone who can do beter to help me to the solution?
The value for members is an array of dictionaries, not a dictionary
This creates the structure sorted by the id keys
let leden = [1 : "Foo", 2: "Bar"]
let sortedKeys = leden.keys.sorted()
let dateString = Date()
var members = [[String:Any]]()
for key in sortedKeys {
let naam = leden[key]!
members.append(["member" : ["id" : key, "naam" : naam], "timestamp" : "\(dateString)"])
}
let entries = ["entries": members]
print(entries)
And the JSON string with
do {
let jsonData = try JSONSerialization.data(withJSONObject: entries)
let json = String(data: jsonData, encoding: .utf8)
print(json)
} catch { print(error) }
I'm working with Alamofire and SwiftyJSON.
I'm trying to make a request with the following structure
{
"email":"ppp#ppp.com",
"password":"pppppp",
"categories": [
{"id":"2"},
{"id":"1"},
{"id":"6"},
{"id":"5"}
]
}
I'm using :
let parameters = [
"email" : userEmail,
"categories" : userPassword,
"categorias" : selectedCategoriesArray]
//where selectedCategoriesArray is a [[String]]()
I fill my selectedCategoriesArray in a loop with this line modifying the array:
selectedCategoriesArray.append(["id", "2"]) //where 2 can be any other number
Alamofire.request( .PUT, url, parameters)
It seems it's working fine but it isn't, I don't know if my String array is taking the right format to be sent to the WS or do I need to encode it in a special way?
Has anyone worked with something like this, A little help would be appreciate.
Thanks!
I think your array should have a type of [[String: String]] in this case.
let userEmail = "myemail#email.com"
let userPassword = "123456"
var selectedCategoriesArray: [[String: String]] = []
for i in 0...5 {
selectedCategoriesArray.append(["id": String(i)])
}
let parameters = [
"email" : userEmail,
"password" : userPassword,
"categories" : selectedCategoriesArray
]
Check with below
let savedData = ["id": 1, "id": 2]
let jsonObject: [String: AnyObject] = [
"email": “xyz#yopmail.com”,
"password": 123456,
"categories": savedData
]
let valid = NSJSONSerialization.isValidJSONObject(jsonObject) // true