Using Alamofire calling JSONArray

Question

I'm still beginner in iOS development. I'm using Swift 3, Alamofire 4 and SwiftyJson for my project. I try to fetch the data from JSON. JSON return in single array. Here is the return :

JSON :

[{
    "id": "1",
    "post_title": "Event_1",
    "post_content": "Taylor Swift",
    "start_date": "2016-11-23",
    "end_date": "2016-11-23",
    "post_date": "2016-11-18"
}, {
    "id": "2",
    "post_title": "Event_2",
    "post_content": "Nickelback",
    "start_date": "2016-11-15",
    "end_date": "2016-11-16",
    "post_date": "2016-11-15"
}, {
    "id": "3",
    "post_title": "Event_3",
    "post_content": "Nirvana",
    "start_date": "10.00pm on 22-02-2012",
    "end_date": "6.00am on 23-02-2012",
    "post_date": "2016-07-10"
}]

Swift :

var newsArray : [[String:Any]] = []

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return newsArray.count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! CustomTableViewCell

    let currentNews = newsArray[indexPath.row]
    if let post_content = currentNews["post_content"] {
        cell.lbl_content.text = post_content as? String
    }

    return cell
}    


func getJSON(){

    Alamofire.request(BASE_URL).responseJSON {
        response in

        switch response.result {
        case .success(let value):
            let json = JSON(value)
            print(json)

            if let tempArray = json as? [[String: Any]] {
                self.newsArray = tempArray
                self.tableView.reloadData()
            }

        case .failure(let error):
            print(error)
        }
    }
}

Issue :

Looks like tempArray don't hold any value.

I try to implement the value in tableViewCell.

Any help is appreciated and many thanks.

Print the tempArray you will get idea whether array is empty or not — Payal Maniyar
– Payal Maniyar, Commented Dec 22, 2016 at 5:20

Pang Ho Ming · Accepted Answer · 2016-12-22 05:24:05Z

1

You can try this code.

Alamofire.request(BASE_URL).responseJSON {
    response in

    switch response.result {
    case .success(let value):
        //to get JSON return value
        if let result = response.result.value {
            let JSON = result as! [[String: Any]]
            //then use guard to get the value your want

        }

case .failure(let error):
    print(error)
}

}

answered Dec 22, 2016 at 5:24

Pang Ho Ming

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8 Comments

Nizzam Over a year ago

Why its return all the value in jsonArray instead of jsonObject ?

Nizzam Over a year ago

And 1 more thing, why you are not using (let value) ?

Pang Ho Ming Over a year ago

"Why its return all the value in jsonArray instead of jsonObject ? " - I dont know either, it depends on your server implementation, I read your json which doesnt have a key in the root level, so i determine that is a jsonArray.

Pang Ho Ming Over a year ago

"And 1 more thing, why you are not using (let value) ?" - You mean why I use guard in stead of let? guard is a swift syntax, please read this ericcerney.com/swift-guard-statement

Nizzam Over a year ago

Correct, the json dont have a key at root level. What is the difference between response.result.value and value ? Looks like you're getting the value from the parameter.

|

jignesh Vadadoriya · Accepted Answer · 2016-12-22 05:13:20Z

0

Try this

if let tempArray = json as? [[String: Any]] {
                self.newsArray = tempArray
                self.tableView.reloadData()
            }

Use json only don't json[]

answered Dec 22, 2016 at 5:13

jignesh Vadadoriya

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2 Comments

jignesh Vadadoriya Over a year ago

what is the value of print(json)?

Nizzam Over a year ago

same like return in JSON at the question.

Hitesh Surani · Accepted Answer · 2016-12-22 05:19:54Z

0

Please try Below

if let tempArray = json as? [[String: Any]] {
                self.newsArray = tempArray.mutableCopy()
                self.tableView.reloadData()
            }

answered Dec 22, 2016 at 5:19

Hitesh Surani

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1 Comment

Nizzam Over a year ago

It error. Value of type [[String:Any]] has no member 'mutableCopy'

Tj3n · Accepted Answer · 2016-12-22 05:38:30Z

0

Try change json[] as? [[String: Any]] to json.array

edited Dec 22, 2016 at 5:38

answered Dec 22, 2016 at 5:21

Tj3n

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2 Comments

Nizzam Over a year ago

It error : Initializer for conditional binding must have Optional type, not '[JSON]'

Tj3n Over a year ago

then change arrayValue to array only, its just for checking nil

Payal Maniyar · Accepted Answer · 2016-12-22 05:39:19Z

0

var newsArray : [[String:Any]] = []

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return newsArray.count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! CustomTableViewCell

    let currentNews = newsArray[indexPath.row]
    if let post_content = currentNews["post_content"] {
        cell.lbl_content.text = post_content as? String
    }

    return cell
}    
    func getJSON(){

    Alamofire.request(BASE_URL).responseJSON {
        response in

        switch response.result {
        case .success(let value):
            let json = JSON(value)
            print(json)

            if let tempArray = json as? NSArray {
                self.newsArray = tempArray
                print(tempArray)
                self.tableView.reloadData()
            }

        case .failure(let error):
            print(error)
        }
    }
    }

Try above line of code. May help you.

answered Dec 22, 2016 at 5:39

Payal Maniyar

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5 Comments

Nizzam Over a year ago

No value on tempArray

Payal Maniyar Over a year ago

print log of print(json)?

Nizzam Over a year ago

on print(json) has value, but when it comes to print(tempArray) is null

Payal Maniyar Over a year ago

can you paste it here?

Nizzam Over a year ago

'NSArray' is not convertible to '[[String:Any]]' so I change to to self.newsArray = tempArray as! [[String:Any]]. After that, the tempArray still no value.

Samrat Pramanik · Accepted Answer · 2016-12-22 06:43:40Z

0

Currently I'm not using Swift 3, Alamofire 4. I have found some solution in the below link. Please check, if you can any solution from this. Link: http://ashishkakkad.com/2015/10/how-to-use-alamofire-and-swiftyjson-with-swift/

Alamofire.request("http://api.androidhive.info/contacts/").responseJSON { (responseData) -> Void in
    if((responseData.result.value) != nil) {

         let swiftyJsonVar = JSON(responseData.result.value!)

        if let resData = swiftyJsonVar["contacts"].arrayObject {
            self.arrRes = resData as! [[String:AnyObject]]
        }
        if self.arrRes.count > 0 {
            self.tblJSON.reloadData()
        }
    }
}

edited Dec 22, 2016 at 6:43

answered Dec 22, 2016 at 5:55

Samrat Pramanik

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2 Comments

Nizzam Over a year ago

if the contacts not exist, what I should I put ?

Samrat Pramanik Over a year ago

@Sendra please try to use this: if let resData = swiftyJsonVar.arrayObject

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