CODEWITHSUNDEEP
iosswiftuitableviewuisearchbar
Nenad Savic
Nenad Savic

Reputation: 77

Searchbar in TableView cant call array

I can not call the Array from Json, I get two points of error.

Can not assign a value of type '[CoinModel]' to type '[String]'

Can not assign value of type 'CoinModel' to type 'String?'

Where am I making mistakes?

import UIKit
import Alamofire
import SwiftyJSON


class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate {

@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var searchBar: UISearchBar!

let URL_DATA = "https://api.coincap.io/v2/assets"

var coin = [CoinModel]()
var searchCoin = [String]()
var searching = false

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    if searching {
        return searchCoin.count
    } else {
        return coin.count
    }

}


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


    tableView.backgroundColor = .clear
    cell.backgroundColor = .clear


    if searching{
        cell.nameLabel.text = searchCoin[indexPath.row]
    } else {
        cell.nameLabel.text = coin[indexPath.row]
    }


    let coindata: CoinModel
    coindata = coin[indexPath.row]


    cell.nameLabel.text = coindata.name
    cell.symbolLabel.text = coindata.symbol
    let priceFloat = (coindata.price as NSString).floatValue
    let costString = String(format:"%.3f", priceFloat)
    cell.priceLabel.text = "\(costString)"
    let percentFloat = (coindata.percent as NSString).floatValue
    let percentString = String(format:"%.2f", percentFloat)

    if percentFloat < 0 {
        cell.percentLabel.text = "\(percentString)%"
        cell.percentLabel.textColor = UIColor(hexString: "#F47E99")
    } else {
         cell.percentLabel.text = "+\(percentString)%"
         cell.percentLabel.textColor = UIColor(hexString: "#19984A")
    }




    return cell

}

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

    searchCoin =  coin.filter({$0.name.prefix(searchText.count) == searchText})
    searching = true
    tableView.reloadData()
}

func getCoinData() {
    Alamofire.request(URL_DATA).responseJSON { response in

        if let json = response.result.value as? [String: Any], let arr = json["data"] as? [[String: Any]] {
            let CoinArray: [[String: Any]] = arr

            for dict in CoinArray {
                if let name = dict["name"] as? String,
                    let symbol = dict["symbol"] as? String,
                    let price = dict["priceUsd"] as? String,
                    let percent = dict["changePercent24Hr"] as? String

                {

                    let coinnModal: CoinModel = CoinModel(name: name, symbol: symbol, price: price, percent: percent)
                    self.coin.append(coinnModal)


                }

                self.tableView.reloadData()
            }

        }
    }
}



override func viewDidLoad() {
    super.viewDidLoad()
    getCoinData()

 }


}

I get error on cell.nameLabel.text = coin[indexPath.row]

Cannot assign value of type 'CoinModel' to type 'String?'

and also on searchCoin = coin.filter({$0.name.prefix(searchText.count) == searchText})

Cannot assign value of type '[CoinModel]' to type '[String]'

Model:

import Foundation

class CoinModel {

var name: String
var symbol: String
var price: String
var percent: String

init(name: String, symbol: String, price: String, percent: String) {

    self.name = name
    self.symbol = symbol
    self.price = price
    self.percent = percent
 }


}

Upvotes: 0

Views: 35

Answers (1)

Rakesha Shastri
Rakesha Shastri

Reputation: 11242

It seems like you want to assign the name of the CoinModel to the label.

cell.nameLabel.text = coin[indexPath.row].name

And for the mapping, if you want an array of CoinModel names then you should be mapping the filtered result.

searchCoin = coin.compactMap( {$0.name.prefix(searchText.count) == searchText ? $0.name: nil} )

Tip: You should be using proper names to describe your variables. For example you have an array of CoinModel which you have named coin which instead could have been named coins. Also, i would recommend that you maintain uniformity while storing your data source. One data source is an array of CoinModels while the other is an array of Strings. You should should have only one, preferably the CoinModel imo.

Upvotes: 2

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