ios - 在不使用 XIB CELL 的情况下使用 swift 4.0 中的段在一个 View Controller 中获取两个 TableView

Question

我有两个 TableView 和一个段控件在第一个段点击我应该得到第一个表和第二个段点击我应该在运行应用程序时得到第二个 TableView 我得到了这样的异常错误

(Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value)

我的 ViewController 代码:

import UIKit

class DemoTableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
struct structOne {
    let cell : Int
    let one : String
}

struct structTwo {
    let cell : Int
    let two : String
}

var arrayOne = [structOne]()
var arrayTwo = [structTwo]()
@IBOutlet weak var tableOne: UITableView!
@IBOutlet weak var segmentDemo: UISegmentedControl!

@IBOutlet weak var tableTwo: UITableView!
override func viewDidLoad() {
    super.viewDidLoad()
    arrayOne = [structOne(cell: 0, one: "One"), structOne(cell: 1, one: "One"), structOne(cell: 2, one: "One")]

    arrayTwo = [structTwo(cell: 0, two: "Two"), structTwo(cell: 1, two: "Two"), structTwo(cell: 2, two: "Two")]

    self.tableOne.delegate = self
    self.tableOne.dataSource = self

    self.tableTwo.delegate = self
    self.tableTwo.dataSource = self

    self.tableTwo.isHidden = true
    self.tableOne.isHidden = false

    self.tableTwo.reloadData()
    self.tableOne.reloadData()

    self.tableTwo.tableFooterView = UIView()
    self.tableOne.tableFooterView = UIView()


    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func segmentAction(_ sender: Any) {
    switch self.segmentDemo.selectedSegmentIndex
    {
    case 0:
        self.tableTwo.isHidden = true
        self.tableOne.isHidden = false
        self.tableOne.reloadData()
    case 1:
        self.tableTwo.isHidden = false
        self.tableOne.isHidden = true
        self.tableTwo.reloadData()
    default:
        break
    }
}


func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if tableOne.isHidden == false{
        return arrayOne.count
    }
    else {
        return arrayTwo.count
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if tableOne.isHidden == false{
        let cell = tableView.dequeueReusableCell(withIdentifier: "One") as! OneTableViewCell
        cell.lblOne.text = arrayOne[indexPath.row].one
        return cell
    }
    else {
       let tcell = tableView.dequeueReusableCell(withIdentifier: "Two") as! TwoTableViewCell
        tcell.labeltwo.text = arrayTwo[indexPath.row].two
        return tcell
    }
}

这是我的第一个单元格代码:

import UIKit

class OneTableViewCell: UITableViewCell {

    @IBOutlet weak var lblOne: UILabel!
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}

这是我的第二个单元格代码:

import UIKit

class TwoTableViewCell: UITableViewCell {

    @IBOutlet weak var labeltwo: UILabel!
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}

Answer 1

例如你有这两个数组。

var arrFirst    = ["One", "One", "One", "One", "One"]
var arrSecond   = ["Second", "Second", "Second", "Second", "Second"]

全局定义

var nSelectedSegmentIndex : Int = 1 // 1 is for 1st SelgmentItem

UITableView代码

extension ViewController: UITableViewDelegate, UITableViewDataSource {
    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if nSelectedSegmentIndex == 1 {
            return arrFirst.count
        }
        else {
            return arrSecond.count
        }
    }

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

        if nSelectedSegmentIndex == 1 {
            cell.textLabel?.text = arrFirst[indexPath.row]
        }
        else {
            cell.textLabel?.text = arrSecond[indexPath.row]
        }

        return cell;
    }
}

分段操作

@IBAction func segmetnValueChange(_ sender: UISegmentedControl) {
    if sender.selectedSegmentIndex == 0 {
        self.nSelectedSegmentIndex = 1
    }
    else {
        self.nSelectedSegmentIndex = 2
    }
    self.tblVW.reloadData()
}