代码之家 › 专栏 › 技术社区 › Tony Merritt

如何将单元格数据放入单元格类而不是VC类?,iOS,斯威夫特

cell uitableview swift ios

-1

Tony Merritt · 技术社区 · 6 年前

我想把一些代码从我的cell for row移到它自己的cell类中,使它更整洁一些。

我的一系列字典。

var appInfo = [[String:Any]]()

我的手机班。

class resultsCell: UITableViewCell {

@IBOutlet weak var iconPicture: UIImageView!    
@IBOutlet weak var titleLabel: UILabel!
@IBOutlet weak var descriptionLabel: UILabel!
@IBOutlet weak var priceLabel: UILabel!
@IBOutlet weak var ratingLabel: UILabel!



func setInfo() {


  }
}

我的VC牢房。

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    if let cell = tableView.dequeueReusableCell(withIdentifier: "resultsCell", for: indexPath) as? resultsCell {

        let appCell = appInfo[indexPath.row]
        let imageUrl = appCell["artwork"] as? String

        if imageUrl == nil {
            cell.iconPicture.image = #imageLiteral(resourceName: "NoAlbumImage")
        }else {
            cell.iconPicture.sd_setImage(with: URL(string: "\(imageUrl!)"))
        }

        cell.titleLabel.text = appCell["name"] as? String
        cell.descriptionLabel.text = appCell["desc"] as? String
        cell.priceLabel.text = appCell["price"] as? String
        let rating = appCell["rating"]
        if rating != nil {
            cell.ratingLabel.text = "Rating: \((rating!))"
        }

        return cell

    }else {
        return UITableViewCell()
}
}

我想把cell.label.text从VC移到cell类的set info函数中。

这是我的JSON解码和结构。

import Foundation

var appInfo = [[String:Any]]()

class searchFunction {

static let instance = searchFunction()

func getAppData(completion: @escaping (_ finished: Bool) -> ()) {
guard let url = URL(string: BASE_ADDRESS) else { return }

URLSession.shared.dataTask(with: url) { (data, response, err) in
    guard let data = data else { return }
    do {
        let decoder = JSONDecoder()
        let appData = try decoder.decode(Root.self, from: data)
        appInfo = []
        for app in appData.results {
            let name = app.trackName
            let desc = app.description

            guard let rating = app.averageUserRating else { continue }
            let price = app.formattedPrice
            let artwork = app.artworkUrl60.absoluteString


            let appInd = ["name":name, "desc":desc, "rating":rating, "price":price, "artwork":artwork] as [String : Any]

            appInfo.append(appInd)
        }
        completion(true)
    }catch let jsonErr {
        print("Error seroalizing json", jsonErr)
    }
    }.resume()
}
}

结构。。

import Foundation


struct Root: Decodable {
var results: [resultsFull]
}

struct resultsFull: Decodable {
var trackName: String
var description: String
var formattedPrice: String
var averageUserRating: Double?
var artworkUrl60: URL
}

3 回复 | 直到 6 年前

Paulw11 6 年前

首先,我将用一个结构数组替换这个字典数组;这样就不需要所有的向下转换:

struct AppInfo {
    var artwork: String?
    var title: String?
    var description: String?
    var price: String?
    var rating: String?
}


var appInfo = [AppInfo]()

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCell(withIdentifier: "resultsCell", for: indexPath) as! ResultsCell 

    cell.appInfo = self.appInfo[indexPath.row]

    return cell
}

那你就可以用 didSet 使用结构中的值更新单元格

class ResultsCell:UITableViewCell {

    @IBOutlet weak var iconPicture: UIImageView!
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var descriptionLabel: UILabel!
    @IBOutlet weak var priceLabel: UILabel!
    @IBOutlet weak var ratingLabel: UILabel!

    var appInfo: AppInfo {
        didSet {
            iconPicture.image = #imageLiteral(resourceName: "NoAlbumImage")
            if let artwork = appInfo.artwork, let artworkURL = URL(string: artwork) {
                iconPicture.sd_setImage(with: artworkURL)
            }

            titleLabel.text = appInfo.title ?? ""
            descriptionLabel.text = appInfo.description ?? ""
            priceLabel.text = appInfo.price ?? ""
            if let rating = appInfo.rating {
                ratingLabel.text = "Rating: \(rating)")
            } else {
                ratingLabel.text = ""
            }
        }
    }
}

Jaydeep Vora 6 年前

在下面写入函数 resultsCell

func setInfo(appCell: [String : Any]) {

    let imageUrl = appCell["artwork"] as? String

    if imageUrl == nil {
        iconPicture.image = #imageLiteral(resourceName: "NoAlbumImage")
    }else {
        iconPicture.sd_setImage(with: URL(string: "\(imageUrl!)"))
    }

    titleLabel.text = appCell["name"] as? String
    descriptionLabel.text = appCell["desc"] as? String
    priceLabel.text = appCell["price"] as? String
    let rating = appCell["rating"]
    if rating != nil {
        ratingLabel.text = "Rating: \((rating!))"
    }
}

现在将数组值传递给,如下所示 cellForRowAt 方法。

let appCell = appInfo[indexPath.row]
cell.setInfo(appCell: appCell)

Enea Dume 6 年前

class ResultsCell: UITableViewCell {

    @IBOutlet weak var iconPicture: UIImageView!
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var descriptionLabel: UILabel!
    @IBOutlet weak var priceLabel: UILabel!
    @IBOutlet weak var ratingLabel: UILabel!



    func setInfo(_ appCell: [String:Any], inIndexPath: IndexPath, _ cntrl: UIViewController) {


        let imageUrl = appCell["artwork"] as? String

        if imageUrl == nil {
            iconPicture.image = #imageLiteral(resourceName: "NoAlbumImage")
        }else {
            iconPicture.sd_setImage(with: URL(string: "\(imageUrl!)"))
        }

        titleLabel.text = appCell["name"] as? String
        descriptionLabel.text = appCell["desc"] as? String
        priceLabel.text = appCell["price"] as? String
        let rating = appCell["rating"]
        if rating != nil {
            ratingLabel.text = "Rating: \((rating!))"
        }
    }
}

在tableView的委托中写入:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    if let cell = tableView.dequeueReusableCell(
      withIdentifier: "your Results Cell ID from storyboard",
      for: indexPath) as? resultsCell {
            let appCell = appInfo[indexPath.row]
        cell.setInfo(appCell, inIndexPath: indexPath, self)

        return cell

    }else {
        return UITableViewCell()
    }
}

为了更进一步,只需删除字典数组,最好使用 structs 属于 models .