Question

我一直在尝试构建一个基本的Swift应用来展示汽车。我有一个UITableView设置。目前我定义了两辆车，但由于某种原因只显示了一辆。

Model.swift

import Foundation
import UIKit

public enum CarColor {
case White
case Blue
case Black
case Red
}

class Model {

var title: String
var description: String
var image: UIImage
var color: CarColor

init(titled: String, description: String, imageName: String){
    self.title = titled
    self.description = description
    if let img = UIImage(named:imageName){
        image = img
    } else {
        image = UIImage(named:"default")!
    }
    color = .White
    }
}

ModelLine.swift

import Foundation

class ModelLine {

var name: String
var models: [Model]


init(named: String, includeModels: [Model]){
    name = named
    models = includeModels
}

class func modelLines() -> [ModelLine]{
    return[self.hondaCRV(), self.hondaPilot()]
}

private class func hondaCRV() -> ModelLine {
    var models = [Model]()
    models.append(Model(titled:"2016 Honda CR-V", description:"All day and into the night, CR-V delivers dynamic crossover performance and style. It's also incredibly spacious, with luxury amenities at the top of its class.", imageName: "crv"))
    return ModelLine(named:"Honda CR-V", includeModels: models)
}

private class func hondaPilot() -> ModelLine {
    var models = [Model]()
    models.append(Model(titled:"2016 Honda Pilot", description:"2016 Model", imageName: "pilot"))
    return ModelLine(named:"Honda Pilot", includeModels: models)
}

HondaModelTableViewController.swift

import UIKit

class HondaModelTableViewController: UITableViewController {

var models: [Model]{
    var modelLines = ModelLine.modelLines()
    return modelLines[0].models
}

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

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}


override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 1
}

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


override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("modelCell", forIndexPath: indexPath) as UITableViewCell

    let model = models[indexPath.row]  
    cell.textLabel?.text = model.title
    cell.detailTextLabel?.text = model.description
    cell.imageView?.image = model.image

    return cell
}

Answer 1

在

var models: [Model]{
    var modelLines = ModelLine.modelLines()
    return modelLines[0].models
}

你只返回数组中的第一个元素。

Answer 2

您只是返回第一个ModelLine数组，其中只有一辆车。

class func modelLines() -> [ModelLine]{
          //index 0         index 1
    return[self.hondaCRV(), self.hondaPilot()]
}

var models: [Model]{
    var modelLines = ModelLine.modelLines()
    return modelLines[0].models //Only index 0 being called.
}

由于您的模型设置为2维数组，因此self.hondaPilot()可能会在稍后实施以返回多个Model，因此我建议您设置ModelLines在部分中，您的Model作为该部分中的行。

    var modelLines : [ModelLines] { //Use modelLines instead so you have access to ALL cars of all modelLines.
        return ModelLine.modelLines()
     } 
    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections4
        return modelLines.count //This will give you 2 sections.
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return modelLines[section].count //Gives you number of models in each modelLines section.
    }

Answer 3

在HondaModelTableViewController中，您只返回modelLines数组的第一个对象。

将return modelLines[0].models替换为：

for model in modelLines {
    return model.models
}

Answer 4

在numberOfRowsInSection中，返回modelLines [0]中的模型数量

您已将本田CR-V装入modelLine [0]，将本田Pilot装入modelLines [1]

您只返回一行，因为这是您指定的数据量。如果您希望两者都出现在同一个表中，则需要对构造函数进行排序

Answer 5

需要解决这些问题：



    // Part I:
    //    var models: [Model]{
    //        var modelLines = ModelLine.modelLines()
    //        return modelLines[0].models
    //    }
    let models = ModelLine.modelLines()

    // Part II:
    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell
        let model = models[indexPath.row].models[0]
        cell.textLabel?.text = model.title
        cell.detailTextLabel?.text = model.description

        return cell
    }

UITableView单元格仅显示1个单元格

5 个答案: