Access JSON array inside another array - ios

Question

So far I only had to deal with simple JSON arrays with only a single array. I have now combined 2 arrays together so I can get my user data and all the reviews for that user:
[
{
"user_id": "16",
"name": "Jonh",
"lastName": "appleseed",
"username": "jonh#me.com",
"sex": "male",
"image_url": "",
"review": [
{
"reviewID": "4",
"merchant_id": "17",
"rating": "5",
"user_id": "16",
"comments": "Very good customer. Strongly suggested",
"date": "0000-00-00",
"reviewYear": "",
"publish": "1"
},
{
"reviewID": "8",
"merchant_id": "16",
"rating": "2",
"user_id": "16",
"comments": "Automatic review due to "NO SHOW" without informing the merchant",
"date": "0000-00-00",
"reviewYear": "",
"publish": "1"
}
]
}
]
before I added the reviews my model looked like this:
import Foundation
class Users {
let userImage:String?
let name:String?
let sex:String?
let image_url:String?
init(dictionary:NSDictionary) {
userImage = dictionary["userImage"] as? String
name = dictionary["name"] as? String
sex = dictionary["sex"] as? String
image_url = dictionary["image_url"] as? String
}
}
func loadUser(completion:(([Users])-> Void), userId: String){
let myUrl = NSURL(string: "http://www.myWebSite.com/api/v1.0/users.php")
let request = NSMutableURLRequest(URL: myUrl!)
request.HTTPMethod = "POST"
let postString = "user_id=\(userId)"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request)
{ data, response, error in
if error != nil {
print("error\(error)")
} else {
do {
let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as! NSArray
print(json)
var users = [Users]()
for user in json{
let user = Users(dictionary: user as! NSDictionary)
users.append(user)
let priority = DISPATCH_QUEUE_PRIORITY_DEFAULT
dispatch_async(dispatch_get_global_queue(priority, 0 )){
dispatch_async(dispatch_get_main_queue()){
completion(users)
}
}
}
} catch{
}
}
}
task.resume()
}
which I could then used in my viewController:
func loadModel() {
let loadingNotification = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
loadingNotification.mode = MBProgressHUDMode.Indeterminate
loadingNotification.labelText = "updating your deals..."
users = [Users]()
let api = Api()
api.loadUser(didLoadUsers , userId: "16")
}
func didLoadUsers(users:[Users]){
self.users = users
self.tableView.reloadData()
MBProgressHUD.hideAllHUDsForView(self.view, animated: true)
}
Can I get the review field so I can present it in a table view controller?

Answer 1

I added to your Users class an array of reviews that will be populated in your user init() method. I recommend you to take look at struct Review and make your user class a struct, and change your NSDictionary to swift Dictionary.
struct Review {
let reviewID:String?
let merchant_id:String?
let user_id:String?
//to be continued with your own implementation...
init(dictionary:[String:String]) {
reviewID = dictionary["reviewID"]
merchant_id = dictionary["merchant_id"]
user_id = dictionary["user_id"]
//to be continued with your own implementation...
}
}
class Users {
let userImage:String?
let name:String?
let sex:String?
let image_url:String?
var reviews:[Review]
init(dictionary:[String:AnyObject]) {
userImage = dictionary["userImage"] as? String
name = dictionary["name"] as? String
sex = dictionary["sex"] as? String
image_url = dictionary["image_url"] as? String
reviews = [Review]()
if let userReviews = dictionary["review"] as? [[String:AnyObject]] {
for review in userReviews {
if let unwrapedReview = review as? [String:String] {
let r = Review(dictionary: unwrapedReview)
reviews.append(r)
}
}
}
}
}
Also I recommend you in the future to use SwiftyJSON for parsing JSON and also Alamofire for networking requests.

Answer 2

Done. It was easier than what I thought. I just had to add a UserReview class and change the signature of loadUser function:
func loadUser(completion:((user: [Users], review: [UserReview])-> Void), userId: String){
let myUrl = NSURL(string: "http://www.myWebsite.com/api/v1.0/users.php")
let request = NSMutableURLRequest(URL: myUrl!)
request.HTTPMethod = "POST"
let postString = "user_id=\(userId)"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request)
{ data, response, error in
if error != nil {
print("error\(error)")
}else{
do{
let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as! NSArray
var users = [Users]()
for user in json{
let user = Users(dictionary: user as! NSDictionary as! [String : AnyObject])
users.append(user)
//*********** now I can access the reviews from my son***************
let reviewArray = json[0]["review"] as! NSArray
var reviews = [UserReview]()
for review in reviewArray{
let review = UserReview(dictionary: review as! NSDictionary as! [String : AnyObject])
reviews.append(review)
}
let priority = DISPATCH_QUEUE_PRIORITY_DEFAULT
dispatch_async(dispatch_get_global_queue(priority, 0 )){
dispatch_async(dispatch_get_main_queue()){
completion(user: users, review: reviews)
}
}
}
} catch{
}
}
}
task.resume()
}
So I can use it in my tableViewController
var users: [Users]?
var reviews: [UserReview]?
func loadModel() {
let loadingNotification = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
loadingNotification.mode = MBProgressHUDMode.Indeterminate
loadingNotification.labelText = "updating..."
users = [Users]()
reviews = [UserReview]()
let api = Api()
api.loadUser(didLoadUsers , userId: "16")
}
func didLoadUsers(users:[Users], reviews:[UserReview] ){
self.users = users
self.reviews = reviews
self.tableView.reloadData()
MBProgressHUD.hideAllHUDsForView(self.view, animated: true)
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 0 {
return users!.count
}
if section == 1 {
return 1
}
if section == 2 {
return reviews!.count
}
return 0
}
So in my cellForRowAtIndexPath I can now load all the reviews
if indexPath.section == 2 {
let review = reviews![indexPath.row]
let reviewCell = tableView.dequeueReusableCellWithIdentifier("reviewCell", forIndexPath: indexPath) as! UserReviewsTableViewCell
reviewCell.useReview(review)
return reviewCell
}