快速单击表格视图单元格时显示索引超出范围或返回主屏幕
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【中文标题】快速单击表格视图单元格时显示索引超出范围或返回主屏幕【英文标题】：Swift when clicking on table view cell it says index out of range or goes back to the home screen 【发布时间】：2018-03-07 03:26:17 【问题描述】：由于某种原因，当我单击表格视图单元格时，它会将我踢出应用程序或说索引超出范围。正在传递信息，因为它在表格视图单元格中显示书名，不确定为什么它不起作用。任何帮助将不胜感激
连接booksearchview和inroviewcontroller的segue是正确的
用于搜索书籍的视图控制器
import UIKit
import Foundation
class ViewController: UIViewController, UITextFieldDelegate
@IBOutlet weak var bookTitleTextField: UITextField!
@IBOutlet weak var authorTextField: UITextField!
var book: String = ""
var author: String = ""
var bookCoversInfo = [UIImage]()
var titlesInfo = [String]()
var authorsInfo = [String]()
var yearInfo = [String]()
var pagesInfo = [String]()
var starRatingInfo = [UIImage]()
var starRatingCountInfo = [Double]()
var reviewsInfo = [String]()
var descriptionsInfo = [String]()
override func viewDidLoad()
super.viewDidLoad()
bookTitleTextField.delegate = self
authorTextField.delegate = self
func textFieldShouldReturn(_ textField: UITextField) -> Bool
bookTitleTextField.resignFirstResponder()
authorTextField.resignFirstResponder()
return true;
func initializeTextFields()
bookTitleTextField.delegate = self
bookTitleTextField.keyboardType = UIKeyboardType.default
authorTextField.delegate = self
authorTextField.keyboardType = UIKeyboardType.default
@IBAction func searchButton(_ sender: UIButton)
var query = ""
if let book = bookTitleTextField.text, let author = authorTextField.text
query = book
if (!query.isEmpty)
query += "+"
query += "inauthor\(author)"
if let book = bookTitleTextField.text
query = book
if let author = authorTextField.text
if (!query.isEmpty)
query += "+"
query += "inauthor:\(author)"
let session: URLSession =
let config = URLSessionConfiguration.default
return URLSession(configuration: config)
()
let queryItems = [NSURLQueryItem(name: "q", value: query)]
let urlComps = NSURLComponents(string: "https://www.googleapis.com/books/v1/volumes?")!
urlComps.queryItems = queryItems as [URLQueryItem]
let booksURL = urlComps.url!
let request = URLRequest(url: booksURL)
// let request = URLRequest(url: urlComps.url!)
let task = session.dataTask(with: request)
(data, response, error) -> Void in
if let jsonData = data
if let jsonString = try? JSONSerialization.jsonObject(with: jsonData, options: [])
let arrayOfTitles = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.title") as? [String]
if let items = arrayOfTitles
self.titlesInfo = items
let arrayOfAuthors = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.authors") as? [String]
if let itemsA = arrayOfAuthors
self.authorsInfo = itemsA
// let arrayOfYear = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.pageCount") as? [String]
let arrayOfPage = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.pageCount") as? [String]
if let itemPages = arrayOfPage
self.pagesInfo = itemPages
let arrayOfRatings = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.averageRating") as? [UIImage]
if let itemStars = arrayOfRatings
self.starRatingInfo = itemStars
let arrayOfReviews = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.ratingsCount") as? [String]
if let itemRating = arrayOfReviews
self.reviewsInfo = itemRating
let arrayOfStarsCount = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.averageRating") as? [Double]
if let itemStarsCount = arrayOfStarsCount
self.starRatingCountInfo = itemStarsCount
let arrayOfDescription = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.description") as? [String]
if let itemDescription = arrayOfDescription
self.descriptionsInfo = itemDescription
let arrayOfBookCover = (jsonString as AnyObject).value(forKeyPath: "items.volumeInfo.imageLinks.thumbnail") as? [UIImage]
if let itemCover = arrayOfBookCover
self.bookCoversInfo = itemCover
DispatchQueue.main.async
self.performSegue(withIdentifier: "findTitles", sender: self)
else
print("Error fetching books \(error.debugDescription)")
task.resume()
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?)
bookTitleTextField.resignFirstResponder()
authorTextField.resignFirstResponder()
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
if (segue.identifier == "findTitles")
if let destinationVC = segue.destination as? BookSearchView
destinationVC.bookCoversReady = bookCoversInfo
destinationVC.booksReady = titlesInfo
destinationVC.authorsReady = authorsInfo
destinationVC.yearReady = yearInfo
destinationVC.pagesReady = pagesInfo
destinationVC.starRatingReady = starRatingInfo
destinationVC.starRatingCountReady = starRatingCountInfo
destinationVC.reviewsReady = reviewsInfo
destinationVC.descriptionsReady = descriptionsInfo
我的图书搜索表格视图单元格在哪里
import UIKit
import Foundation
var myIndex = 0
class BookSearchView: UITableViewController
var bookCoversReady = [UIImage]()
var booksReady = [String]()
var authorsReady = [String]()
var yearReady = [String]()
var pagesReady = [String]()
var starRatingReady = [UIImage]()
var starRatingCountReady = [Double]()
var reviewsReady = [String]()
var descriptionsReady = [String]()
var bookCoversSend: UIImage?
var titleSend: String = ""
var authorsSend: String = ""
var yearSend: String = ""
var pagesSend: String = ""
var starRatingSend: UIImage?
var starRatingCountSend: Double = 0.0
var reviewsSend: String = ""
var descriptionsSend: String = ""
override func viewDidLoad()
super.viewDidLoad()
override func viewDidAppear(_ animated: Bool)
super.viewDidAppear(animated)
tableView.reloadData()
override func numberOfSections(in tableView: UITableView) -> Int
return 2
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
return booksReady.count
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = booksReady[indexPath.row]
cell.detailTextLabel?.text = authorsReady[indexPath.row]
return cell
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
myIndex = indexPath.row
// bookCoversSend = bookCoversReady[indexPath.row]
// titleSend = booksReady[indexPath.row]
// authorsSend = authorsReady[indexPath.row]
// yearSend = yearReady[indexPath.row]
// pagesSend = pagesReady[indexPath.row]
// starRatingSend = starRatingReady[indexPath.row]
// starRatingCountSend = starRatingCountReady[indexPath.row]
// reviewsSend = reviewsReady[indexPath.row]
// descriptionsSend = descriptionsReady[indexPath.row]
DispatchQueue.main.async
self.performSegue(withIdentifier: "bookInfo", sender: self)
func prepareForSegue(segue: UIStoryboardSegue, sender: Any?)
if (segue.identifier == "bookInfo")
if let destinationVC = segue.destination as? InfoViewController
destinationVC.bookCoversDisplay = bookCoversReady
destinationVC.titlesDisplay = booksReady
destinationVC.authorsDisplay = authorsReady
destinationVC.yearDisplay = yearReady
destinationVC.pagesDisplay = pagesReady
destinationVC.starRatingDisplay = starRatingReady
destinationVC.starRatingNumber = starRatingCountReady
destinationVC.reviewsDisplay = reviewsReady
destinationVC.descriptionsDisplay = descriptionsReady
用于显示图书信息的信息视图控制器
import UIKit
import Foundation
class InfoViewController: UIViewController
@IBOutlet var bookTitleLabel: UILabel!
@IBOutlet var authorLabel: UILabel!
@IBOutlet var bookYear: UILabel!
@IBOutlet var numberOfPages: UILabel!
@IBOutlet var totalReviews: UILabel!
@IBOutlet var descriptionLabel: UILabel!
@IBOutlet var bookCoverImage: UIImageView!
@IBOutlet var ratingStars: UIImageView!
var titlesDisplay = [String]()
var authorsDisplay = [String]()
var yearDisplay = [String]()
var pagesDisplay = [String]()
var starRatingNumber = [Double]()
var reviewsDisplay = [String]()
var descriptionsDisplay = [String]()
var bookCoversDisplay = [UIImage]()
var starRatingDisplay = [UIImage]()
override func viewDidLoad()
super.viewDidLoad()
bookCoverImage.image = bookCoversDisplay[myIndex]
bookTitleLabel.text = titlesDisplay[myIndex]
authorLabel.text = authorsDisplay[myIndex]
bookYear.text = yearDisplay[myIndex]
numberOfPages.text = pagesDisplay[myIndex]
ratingStars.image = starRatingDisplay[myIndex]
let starRating = starRatingNumber[myIndex]
totalReviews.text = reviewsDisplay[myIndex]
descriptionLabel.text = descriptionsDisplay[myIndex]
if starRating < 0.5
ratingStars.image = UIImage(named: "zerostars")
else if starRating >= 0.5 && starRating < 1.0
ratingStars.image = UIImage(named: "halfstar")
else if starRating >= 1.0 && starRating < 1.5
ratingStars.image = UIImage(named: "onestar")
else if starRating >= 1.5 && starRating < 2.0
ratingStars.image = UIImage(named: "onehalfstar")
else if starRating >= 2.0 && starRating < 2.5
ratingStars.image = UIImage(named: "twostars")
else if starRating >= 2.5 && starRating < 3.0
ratingStars.image = UIImage(named: "twohalfstars")
else if starRating >= 3.0 && starRating < 3.5
ratingStars.image = UIImage(named: "threestars")
else if starRating >= 3.5 && starRating < 4.0
ratingStars.image = UIImage(named: "threehalfstars")
else if starRating >= 4.0 && starRating < 4.5
ratingStars.image = UIImage(named: "fourstars")
else if starRating >= 4.5 && starRating < 5.0
ratingStars.image = UIImage(named: "fourhalfstars")
else if starRating == 5.0
ratingStars.image = UIImage(named: "fivestars")
// bookCoverImage.image = bookCoversDisplay
// bookTitleLabel.text = titlesDisplay
// authorLabel.text = authorsDisplay
// bookYear.text = yearDisplay
// numberOfPages.text = pagesDisplay
// ratingStars.image = starRatingDisplay
// totalReviews.text = reviewsDisplay
// descriptionLabel.text = descriptionsDisplay
【问题讨论】：
问题可能出在 InfoViewController viewDidLoad 中，请确保 myIndex 小于数组计数。 我检查了每个数组计数，但是当我测试时，它只是在进行编辑之前显示正常屏幕。 【参考方案1】：在您的 BookSearchView 中，我认为您将返回 2 个部分以在 tableview 中显示两个部分，其中一个将显示书籍内容，另一个将显示作者内容。 如果是这样的话，
你需要像这样有条件地返回 numberOfRowsInSection
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
switch section
case 0: return booksReady.count
case 1: return authorsReady.count
default: return 0
由于您尝试访问尚未在 numberOfRowsInSection 中定义的 authorsready 索引，因此您遇到索引超出范围错误。
【讨论】：
这使得我的标题不会在表格视图单元格中重复。当我单击一个表格视图单元格时，它仍然会返回主屏幕。 除了title和description之外的其他数组还是0【参考方案2】：如果您将作者姓名代码更改如下，它将起作用。因为作者姓名是以 Array of Array 的形式出现的。
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = booksReady[indexPath.row] as? String
var authorNames = authorsReady[0] as! [Any]
let authorNamesStr = authorNames[indexPath.row] as! [Any]
cell.detailTextLabel?.text = authorNamesStr[0] as? String
return cell
【讨论】：
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