I try to read an URL request (in dictionary "vehicles")in a json but the array will empty
This is the json and I need to read the dictionary and the url that are in vehicles
{
"count": 87,
"next": "https://swapi.co/api/people/?page=2",
"previous": null,
"results": [
{
"name": "Luke Skywalker",
"height": "172",
"mass": "77",
"hair_color": "blond",
"skin_color": "fair",
"eye_color": "blue",
"birth_year": "19BBY",
"gender": "male",
"homeworld": "https://swapi.co/api/planets/1/",
"films": [
"https://swapi.co/api/films/2/",
"https://swapi.co/api/films/6/",
"https://swapi.co/api/films/3/",
"https://swapi.co/api/films/1/",
"https://swapi.co/api/films/7/"
],
"species": [
"https://swapi.co/api/species/1/"
],
"vehicles": [
"https://swapi.co/api/vehicles/14/",
"https://swapi.co/api/vehicles/30/"
],
This is the code that I try
if let results = json["results"] as? [[String : AnyObject]] {
var finalArray2 : [String] = []
for result in results {
if let dict = result as? [String: Any], let vehicles = dict["vehicles"] as? String{
self.URLveicoli = vehicles
//print(self.nomepersonaggio)
print(self.URLveicoli)
//finalArray.append(name)
finalArray2.append(vehicles)
}
}
print(finalArray2)
}
In json vehicles is an array of strings (urls) not a string.
Change this
let vehicles = dict["vehicles"] as? String
To
let vehicles = dict["vehicles"] as? [String]
And to append array of vechicles
finalArray2.append(contentsOf: vehicles)
Related
I am making use of the Microsoft Graph API, specifically the FindMeetingTimes API. Which can be seen here: https://learn.microsoft.com/en-us/graph/api/user-findmeetingtimes?view=graph-rest-1.0
I am using Swift to develop this. My JSON object works and the post is successful, but I am just wondering what would be the best / most efficient way to alter this code so that it cuts out the repetitive code - specifically the adding of locations in the JSON. The locations list could be very large, so I would like to iterate through an locations array and add these to the JSON object..
My method looks like this:
static func setupJsonObjectForFindMeetingTimeAllRooms(nameOfRoom: String, roomEmailAddress: String, dateStartString: String, dateEndString: String, durationOfMeeting: String) -> [String: Any] {
let jsonObj : [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": nameOfRoom,
"address": roomEmailAddress
]
]
],
"locationConstraint": [
"isRequired": "true",
"suggestLocation": "false",
"locations": [
[
"displayName": "First Floor Test Meeting Room 1",
"locationEmailAddress": "FirstFloorTestMeetingRoom1#microsoft.com"
],
[
"displayName": "Ground Floor Test Meeting Room 1",
"locationEmailAddress": "GroundFloorTestMeetingRoom1#microsoft.com"
]
//and the rest of the rooms below this.. how do i do this outside in a loop? to prevent repetitive code?
]
],
"timeConstraint": [
"activityDomain":"unrestricted",
"timeslots": [
[
"start": [
"dateTime": dateStartString,
"timeZone": Resources.utcString
],
"end": [
"dateTime": dateEndString,
"timeZone": Resources.utcString
]
]
]
],
"meetingDuration": durationOfMeeting,
"returnSuggestionReasons": "true",
"minimumAttendeePercentage": "100",
"isOrganizerOptional": "true"
]
return jsonObj
}
What is the best way to go about doing this? Would I just remove the locations part of the JSON, and before returning, populate it with the array of locations?
I tried to implement a method to add locations to the JSON - using this method:
static func addLocationsToExistingJson(locations: [String], jsonObj: [String: Any]) -> [String: Any] {
var data: [String: Any] = jsonObj
for i in stride(from: 0, to: locations.count, by: 1){
let item: [String: Any] = [
"displayName": locations[i],
"locationEmailAddress": locations[i]
]
// get existing items, or create new array if doesn't exist
var existingItems = data["locations"] as? [[String: Any]] ?? [[String: Any]]()
// append the item
existingItems.append(item)
// replace back into `data`
data["locations"] = existingItems
}
return data
}
and calling this method before returning the JSON in the original method.. But it seems that the final JSON is not the format that I want.
The incorrect version looks like this:
["timeConstraint": ["activityDomain": "unrestricted", "timeslots": [["start": ["dateTime": "2019-02-07 14:00:00", "timeZone": "UTC"], "end": ["dateTime": "2019-02-07 15:00:00", "timeZone": "UTC"]]]], "minimumAttendeePercentage": "100", "isOrganizerOptional": "true", "returnSuggestionReasons": "true", "meetingDuration": "PT60M", "attendees": [["type": "required", "emailAddress": ["name": "N", "address": "TestUser6#qubbook.onmicrosoft.com"]]], "locationConstraint": ["isRequired": "true", "suggestLocation": "false"]]
Whereas the working JSON looks like this:
["timeConstraint": ["activityDomain": "unrestricted", "timeslots": [["start": ["dateTime": "2019-02-07 14:30:00", "timeZone": "UTC"], "end": ["dateTime": "2019-02-07 15:30:00", "timeZone": "UTC"]]]], "attendees": [["type": "required", "emailAddress": ["name": "N", "address": "TestUser6#qubbook.onmicrosoft.com"]]], "minimumAttendeePercentage": "100", "locations": [["displayName": "FirstFloorTestMeetingRoom1#qubbook.onmicrosoft.com", "locationEmailAddress": "FirstFloorTestMeetingRoom1#qubbook.onmicrosoft.com"], ["displayName": "GroundFloorTestMeetingRoom1#qubbook.onmicrosoft.com", "locationEmailAddress": "GroundFloorTestMeetingRoom1#qubbook.onmicrosoft.com"]], "locationConstraint": ["isRequired": "true", "suggestLocation": "false"], "meetingDuration": "PT60M", "isOrganizerOptional": "true", "returnSuggestionReasons": "true"]
How would I change my code so that the locations get added under the locationConstraint object within the JSON, rather than just to the JSON, not under the ["locationConstraint"] part?
As Joakim suggested, you could model the json structure via structs and Codable. For example:
struct AdditionalData: Codable {
let emailAdress: [String]
}
struct Person: Codable {
let age: Int
let name: String
let additionalData: AdditionalData
}
let additionalData = AdditionalData(emailAdress: ["test#me.com", "foo#bar.com"])
let p1 = Person(age: 30,
name: "Frank",
additionalData: additionalData)
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
if let data = try? encoder.encode(p1),
let jsonString = String(data: data, encoding: .utf8) {
print(jsonString)
}
Which results in:
{
"age" : 30,
"name" : "Frank",
"additionalData" : {
"emailAdress" : [
"test#me.com",
"foo#bar.com"
]
}
}
Using swift, I am attempting to access the "locations" object within the "locationConstraint" part of a JSON that looks like this:
let jsonObj : [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": nameOfRoom,
"address": roomEmailAddress
]
]
],
"locationConstraint": [
"isRequired": "true",
"suggestLocation": "false",
"locations": [
[
"displayName": "First Floor Test Meeting Room 1",
"locationEmailAddress": "FirstFloorTestMeetingRoom1#onmicrosoft.com"
],
[
"displayName": "Ground Floor Test Meeting Room 1",
"locationEmailAddress": "GroundFloorTestMeetingRoom1#onmicrosoft.com"
]
//and the rest of the rooms below this..
]
],
"meetingDuration": durationOfMeeting,
]
I am attempting to add items to the locations from outside this method (to prevent repetitive code, as location list could be large) - but I am having problems replacing back into this part of the json..
My method to do this:
static func setupJsonObjectForFindMeetingTimeAllRoomsTest(nameOfRoom: String, roomEmailAddress: String, dateStartString: String, dateEndString: String, durationOfMeeting: String, locations: [String]) -> [String: Any] {
let jsonObj : [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": nameOfRoom,
"address": roomEmailAddress
]
]
],
"meetingDuration": durationOfMeeting
]
let jsonObject = addLocationsToExistingJson(locations:locations, jsonObj: jsonObj)
return jsonObject
}
and my method to add locations to the existing json object:
static func addLocationsToExistingJson(locations: [String], jsonObj: [String: Any]) -> [String: Any] {
var data: [String: Any] = jsonObj
let locConstraintObj = [
"isRequired": "true",
"suggestLocation": "false",
"locations" : []
] as [String : Any]
//try access locationConstraint part of json
data["locationConstraint"] = locConstraintObj
for i in stride(from: 0, to: locations.count, by: 1) {
let item: [String: Any] = [
"displayName": locations[i],
"locationEmailAddress": locations[i]
]
// get existing items, or create new array if doesn't exist
//this line below wrong? I need to access data["locationConstraint]["locations"]
//but an error occurs when i change to the above.. .how do i access it?
var existingItems = data["locations"] as? [[String: Any]] ?? [[String: Any]]()
// append the item
existingItems.append(item)
// replace back into `data`
data["locations"] = existingItems
}
return data
}
So ultimately, my final json object that works should look like this:
["meetingDuration": "PT60M", "returnSuggestionReasons": "true",
"attendees": [["emailAddress": ["address":
"TestUser6#qubbook.onmicrosoft.com", "name": "N"], "type":
"required"]], "minimumAttendeePercentage": "100",
"locationConstraint": ["locations": [["displayName": "First Floor Test
Meeting Room 1", "locationEmailAddress":
"FirstFloorTestMeetingRoom1#qubbook.onmicrosoft.com"], ["displayName":
"Ground Floor Test Meeting Room 1", "locationEmailAddress":
"GroundFloorTestMeetingRoom1#qubbook.onmicrosoft.com"]],
"suggestLocation": "false", "isRequired": "true"], "timeConstraint":
["activityDomain": "unrestricted", "timeslots": [["start":
["dateTime": "2019-02-07 14:30:00", "timeZone": "UTC"], "end":
["dateTime": "2019-02-07 15:30:00", "timeZone": "UTC"]]]],
"isOrganizerOptional": "true"]
Where as it looks like this:
["timeConstraint": ["activityDomain": "unrestricted", "timeslots":
[["start": ["dateTime": "2019-02-08 08:30:00", "timeZone": "UTC"],
"end": ["dateTime": "2019-02-08 09:30:00", "timeZone": "UTC"]]]],
"locationConstraint": ["suggestLocation": "false", "locations": [],
"isRequired": "true"], "attendees": [["emailAddress": ["address":
"TestUser6#qubbook.onmicrosoft.com", "name": "N"], "type":
"required"]], "returnSuggestionReasons": "true",
"isOrganizerOptional": "true", "minimumAttendeePercentage": "100",
"locations": [["locationEmailAddress":
"FirstFloorTestMeetingRoom1#qubbook.onmicrosoft.com", "displayName":
"FirstFloorTestMeetingRoom1#qubbook.onmicrosoft.com"],
["locationEmailAddress":
"GroundFloorTestMeetingRoom1#qubbook.onmicrosoft.com", "displayName":
"GroundFloorTestMeetingRoom1#qubbook.onmicrosoft.com"]],
"meetingDuration": "PT60M"]
Where the locations object is being added outside the locationConstraint part of the JSON.. I know I need to be accessing the locationConstraint part of my json like this: var existingItems = data["locationConstraint"]!["locations"] as? [[String: Any]] ?? [[String: Any]]() but this returns an error:
Type 'Any' has no subscript members
This is my first time working with JSONs and trying to manipulate them in swift.. How would I go about fixing this?
Solution by using model objects and Codable
as trojanfoe proposed, you should use model objects and manipulate them directly.
import Foundation
struct Meeting: Codable {
var attendees: [Attendee]
var locationConstraint: LocationConstraint
var meetingDuration: Int
}
struct Attendee: Codable {
var type: Type
var emailAddress: EmailAdress
enum `Type`: String, Codable {
case required
}
}
struct LocationConstraint: Codable {
var isRequired: Bool
var suggestLocation: Bool
var locations: [Location]
}
struct EmailAdress: Codable {
var name: String
var address: String
}
struct Location: Codable {
var displayName: String
var locationEmailAddress: String
}
At first we take your dictionary...
let jsonDict: [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": "specificName",
"address": "specificAdress"
]
]
],
"locationConstraint": [
"isRequired": true,
"suggestLocation": false,
"locations": [
[
"displayName": "First Floor Test Meeting Room 1",
"locationEmailAddress": "FirstFloorTestMeetingRoom1#onmicrosoft.com"
],
[
"displayName": "Ground Floor Test Meeting Room 1",
"locationEmailAddress": "GroundFloorTestMeetingRoom1#onmicrosoft.com"
]
]
],
"meetingDuration": 1800,
]
... and serialize it.
let jsonData = try JSONSerialization.data(withJSONObject: jsonDict, options: .prettyPrinted)
print(String(data: jsonData, encoding: String.Encoding.utf8))
We then decode it into our meeting model.
var meeting = try JSONDecoder().decode(Meeting.self, from: jsonData)
We initialize a new location and append it to our meeting.locationConstraints.locations array.
let newLocation = Location(displayName: "newDisplayName", locationEmailAddress: "newLocationEmailAdress")
meeting.locationConstraint.locations.append(newLocation)
And finally reencode our model object again.
let updatedJsonData = try JSONEncoder().encode(meeting)
print(String(data: updatedJsonData, encoding: String.Encoding.utf8))
I am having the following web service response in which I need parse the parameters based on "MainServiceCategories_ID"
Here is the response
{
"Entity": {
"ID": 20021,
"UserTypeID": 1,
"UserType": null,
"UserID": 30046,
"Code": "lPx1lTEq",
"Name": "بدراء",
"EnglishName": "Badra",
"IconProfileImageID": "",
"MainImageProfileImageID": "EED372C3-5C4F-E711-8100-0CC47A343427",
"LocationLng": 78.37021,
"LocationLat": 17.432563,
"Services": [
{
"ID": 11788,
"MainServiceCategories_ID": 3,
"ServiceCategories_ID": 6,
"Children": [
{
"Parent_ID": 6,
"Name": “John”,
"EnglishName": “Johnny”,
},
{
"Parent_ID": 6,
"Name": “Ronny”,
"EnglishName": “Ronny”,
}]
},
{
"ID": 11788,
"MainServiceCategories_ID": 2,
"ServiceCategories_ID": 6,
"Children": [
{
"Parent_ID": 6,
"Name": “Samuel”,
"EnglishName": “Samuel”,
},
{
"Parent_ID": 6,
"Name": “Badri”,
"EnglishName": “Badri”,
}]
},
{
"ID": 11788,
"MainServiceCategories_ID": 3,
"ServiceCategories_ID": 6,
"Children": [
{
"Parent_ID": 6,
"Name": “emma”,
"EnglishName": “Emma”,
},
{
"Parent_ID": 6,
"Name": “Sean”,
"EnglishName": “Sean”,
}]
}]
this is the code I am writing to do it
do{
let entityDic = responseDictionary["Entity"] as? [String: Any]
let servicesDic = entityDic?["Services"] as? [Any]
for i in 0 ..< servicesDic!.count {
let services = servicesDic?[i] as? [String: Any]
let availableServices = services!["EnglishName"]
servicesNamesArr.append(availableServices! as! String)
let children = services!["Children"]
childrenServices.append(children!)
let MainServiceCategories_ID = services!["MainServiceCategories_ID"]
MainServiceCategoriesID.append(MainServiceCategories_ID!)
}
print("childrenServices \(childrenServices)")
}
catch let error{
print(error)
}
I am able to get upto children dictionaries. Now the thing is I am trying to parse "English name" under children section and separate them based on "MainServiceCategories_ID" where I am getting fatal error in unwrapping the value.
for example if MainServiceCategories_ID =1 then that "English Name" need to be store in an array and if MainServiceCategories_ID =2 then into another array
The problem is, you are trying to parse "EnglishName" as a key of an element of the "Services" array and not as a key of a "Children" element. "Services" does not have a key "EnglishName", so you can't store that in servicesNamesArr. servicesDic should also be an Array of Dictionaries and not an array of Any objects.
See below code using guard statements using safe optional unwrapping:
do{
guard let entityDic = responseDictionary["Entity"] as? [String: Any] else {return}
guard let servicesDic = entityDic?["Services"] as? [[String:Any]] else {return}
for service in services {
guard let MainServiceCategoryID = service["MainServiceCategories_ID"] as? Int else {return}
MainServiceCategoriesID.append(MainServiceCategoryID)
guard let children = service["Children"] as? [[String:Any]] else {return}
childrenServices.append(children)
if MainServiceCategoryID == 3 {
for child in children {
if let availableService = child["EnglishName"] as? String {
servicesNamesArr.append(availableService)
}
}
}
}
print("childrenServices \(childrenServices)")
} catch let error{
print(error)
}
I'm trying to parse an API response in Swift an Im having trouble getting to nested objects and arrays in the response
here is my sample json
{
"Id": "10",
"Name": "PV Prediction By Site",
"Description": "",
"Permalink": "",
"Source_format": "JSON",
"Internal_function_name": "get-meteo-by-site",
"Additional_parameters": "Prediction",
"Sites": null,
"Data": [
{
"UTCDateString": "2017-05-01T20:10:33Z",
"Value": [
{
"metadata": {
"name": "Beck_Hill",
"latitude": 46.26,
"longitude": -112.44,
"height": 1926,
"timezone_abbrevation": "MDT",
"utc_timeoffset": -6,
"modelrun_utc": "2017-05-01 12:00",
"modelrun_updatetime_utc": "2017-05-01 16:41",
"kwp": 40.26,
"slope": 30,
"facing": 180,
"tracking": 0
},
"units": {
"time": "YYYY-MM-DD hh:mm",
"pvpower": "kW",
"snowcover": "mm",
"iam": "percent",
"temperature": "C"
},
"data_xmin": {
"time": [
"2017-05-01 07:00",
"2017-05-01 07:15",
"2017-05-01 07:30",
"2017-05-01 07:45",
"2017-05-01 08:00",
"2017-05-01 08:15",
"2017-05-01 08:30"
],
"pvpower_instant": [
40.26,
40.26,
40.26,
40.26,
40.26
]
}
}
]
}
]
}
And here is some of my parsing code, I can get to the first object in the "Data" array fine, but when i try to get the first object in the Value string it fails to convert the AnyObject to anything else
//get a Dictionary of sites
sitesDictionary = try JSONSerialization.jsonObject(with: decodedData, options: .allowFragments) as? [[String:AnyObject]]
CoreDataStack.sharedInstance.persistentContainer.performBackgroundTask({ (context) in
//loop thorugh all site and create SiteMO objects from them
for site in (sitesDictionary?.enumerated())! {
//SiteMO
let siteMO = SiteMO.siteInfo(siteInfo: site.element, inManagedObjectContext: context)!
let siteFeedsDictionary = site.element["Feeds"] as! [[String:AnyObject]]
//loop through every feed object and create FeedMO objects from them
for feed in siteFeedsDictionary.enumerated() {
//FeedMO
let feedMO = FeedMO.feedInfo(feedInfo: feed.element, site: siteMO, inManagedObjectContext: context)!
//what type of data is in the feed?
switch feedMO.additionalParameters! {
case "Weather":
//its a feed with a Weather object
print("There should be a WeatherMO created Here")
case "Prediction":
//its a feed with a Prediction object
let dataArray = feed.element["Data"] as? [[String:AnyObject]]
I need some data out of the "metadata" "units" and "data_xmin" objects
For metadata
result[“Data”][0][“Value”][0]
I have a JSON file with this person objects. Each person has different information. This is the structure of the JSON file.
[
{
"person": {
"name": "Dani",
"job": "Artist",
"country": "FR",
"sold": "992",
"email": "Dani",
"facebook": "Artist",
"twitter": "Dani",
"instagram": "Artist",
"snapchat": "Dani",
"photo": "Artist"
}
},
{
"person": {
"name": "Alex",
"job": "",
"country": "TU",
"sold": "992",
"email": "Dani",
"facebook": "Artist",
"twitter": "Dani",
"instagram": "Artist",
"snapchat": "Dani",
"photo": "Artist"
}
}
]
I was able to open the json file but I am not able to parse it. This is my code
func lodData()
{
let data = NSData(contentsOfURL: url!)
do {
let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments)
if let person = json["person"] as? [[String: AnyObject]] {
for p in person {
if let name = p["name"] as? String {
names.append(name)
}
}
}
} catch {
print("error serializing JSON: \(error)")
}
print(names)
}
As result the names array still empty.
person is [String: String] means dictionary not an array .. .you can do something like this
if let data = json as? [[String: AnyObject]] {
for p in data {
if let person = p["person"] as? [String: String]{
names.append(person["name"])
}
}
}