如何以编程方式将不同单元格的不同图像添加到tableView（Swift 3）

Question

I'm trying to add different images to different cell in a tableView where i have already a list of string, this is my code, the struct of category:

struct QCategoryy {
    var name:String
    var image:UIImage
    var isSelected = false
    init(name:String, image:UIImage) {
        self.name = name
        self.image = image
    }
}

extension QCategoryy: ExpressibleByStringLiteral {


    init(stringLiteral value: String) {
        self.name = value
    }
    init(unicodeScalarLiteral value: String) {
        self.init(name: value)
    }
    init(extendedGraphemeClusterLiteral value: String) {
        self.init(name: value)
    }
}

here is where i create the list (which i will then add to the tableView)

import Foundation
import UIKit
import CoreLocation
import Alamofire

class NearbyPlaces {
    static func getCategories() -> [QCategoryy] {
        let list:[QCategoryy] = [QCategoryy(name: "Art_gallery", image: UIImage(named: "art_button.png")!), QCategoryy(name: "Bar", image: UIImage(named: "bar_button.png")!), QCategoryy(name :"Night_club", image: UIImage(named: "nightclub_button.png")!), QCategoryy(name: "Movie_theater", image: UIImage(named: "cinema_button.png")!), QCategoryy(name: "Restaurant", image: UIImage(named: "restaurant_button.png")!), QCategoryy(name: "Gym", image: UIImage(named: "gym_button.png")!), QCategoryy(name: "Spa", image: UIImage(named: "spa_button.png")!), QCategoryy(name: "Museum", image: UIImage(named: "museum_button.png")!)]
        return list
    }

and finally i add this to the tableView

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let identifier = "CATEGORY_CELL"
        let cell = tableView.dequeueReusableCell(withIdentifier: identifier, for: indexPath)
        let selectedIndexPaths = tableView.indexPathsForSelectedRows
        let rowIsSelected = selectedIndexPaths != nil && selectedIndexPaths!.contains(indexPath)
       /* cell.accessoryType = rowIsSelected ? .checkmark : .none  */
        cell.accessoryType = list[indexPath.row].isSelected ? .checkmark : .none
        cell.textLabel?.text = list[indexPath.row].name
        cell.imageView?.image = list[indexPath.row].image
        return cell
    }

my problem is that after i decided to add the images, so in the struct i added the image var image:UIImage i get in the extension of QCategoryy at the lines self.init(name: value) the error: Argument labels '(name:)' do not match any available overloads. How can i do to solve this problem? My goal is just to be able to add the images to the different cells of the tableView (associated with the right name obviously).

Answer 1

I think your error is probably because your var isSelected is being initialized but the other variables aren't. So you might want to initialize everyone at their declaration, like this:

struct QCategoryy {
    var name = ""
    var image = UIImage()
    var isSelected = false
}

or like this:

struct QCategoryy {
    var name:String
    var image:UIImage
    var isSelected: Bool
    init(name:String, image:UIImage, isSelected: Bool) {
        self.name = name
        self.image = image
        self.isSelected = isSelected
    }
}

As you're not initialising neither name nor image when you declare those variables, you have to initialise them somehow.

In your init function in your struct you're expecting name and image as parameters, so you have to add them in you init call inside the extension and you also need to initialise your image variable

extension QCategoryy: ExpressibleByStringLiteral {


    init(stringLiteral value: String) {
        self.name = value
        self.image = UIImage()
    }
    init(unicodeScalarLiteral value: String) {
        self.init(name: value, image: UIImage())
    }
    init(extendedGraphemeClusterLiteral value: String) {
        self.init(name: value, image: UIImage())
    }
}