我已经很好地，确实地搜索了Stack Overflow，提供了各种不同的选项，但似乎都无法正常工作。
我有一个应用程序，该应用程序包含NFL（例如，犯罪/防御）等的术语表。它来自JSON API，并且存储在本地。我想以编程方式对数据进行排序，因此这些术语均按字母顺序在其各自的部分（“ A”，“ B”，“ C”等）中列出。
View Controller：
import UIKit
class GlossaryVC: UIViewController, UITableViewDelegate, UITableViewDataSource {
private let glossaryCellId = "GlossaryCell"
var glossarys = [Offence]()
var filteredGlossarys = [Offence]()
private var subCategorySet: Set<String> = []
private var glossarysDictionary: [String: [Offence]] = [:]
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var searchBar: UISearchBar!
@IBOutlet weak var noResultsView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
filteredGlossarys = glossarys
tableView.delegate = self
tableView.dataSource = self
tableView.backgroundColor = UIColor.clear
searchBar.delegate = self
noResultsView.isHidden = true
hideKeyboardWhenTappedAround()
}
override func viewDidAppear(_ animated: Bool) {
DataProvider.getData(with: .GLOSSARY_DATA_URL) { (letters) in
self.glossarys = letters.flatMap { $0.offences }
self.filteredGlossarys = self.glossarys
self.groupGlossarys()
}
}
func groupGlossarys() {
glossarysDictionary.removeAll()
subCategorySet.removeAll()
for glossary in filteredGlossarys {
subCategorySet.insert(glossary.glossaryLetter!)
}
for subCategory in subCategorySet {
glossarysDictionary[subCategory] = []
}
for glossary in filteredGlossarys {
var list = glossarysDictionary[glossary.glossaryLetter!]
list?.append(glossary)
glossarysDictionary[glossary.glossaryLetter!] = list
}
checkAndShowTableView()
}
func checkAndShowTableView() {
if subCategorySet.count > 0 {
tableView.isHidden = false
noResultsView.isHidden = true
tableView.reloadData()
} else {
tableView.isHidden = true
noResultsView.isHidden = false
}
}
func tableView(_ tableView: UITableView, willDisplayHeaderView view: UIView, forSection section: Int) {
let header = view as! UITableViewHeaderFooterView
header.textLabel?.font = UIFont(name: "Nano", size: 17)!
header.textLabel?.textColor = UIColor.white
header.textLabel?.textAlignment = .center
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 50
}
func numberOfSections(in tableView: UITableView) -> Int {
return subCategorySet.count
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
let subCategoryList = Array(subCategorySet)
return subCategoryList[section]
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let subCategoryList = Array(subCategorySet)
let glossaryList = glossarysDictionary[subCategoryList[section]]
return glossaryList!.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let glossaryCell = tableView.dequeueReusableCell(withIdentifier: glossaryCellId, for: indexPath) as? GlossaryCell else {
fatalError("Unable to dequeue contact cell")
}
let subCategoryList = Array(subCategorySet)
let glossaryList = glossarysDictionary[subCategoryList[indexPath.section]]
glossaryCell.configure(glossary:(glossaryList?[indexPath.row])!)
return glossaryCell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
cell.backgroundColor = UIColor.clear
cell.contentView.backgroundColor = UIColor.clear
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let viewGlossaryDetailsVC = segue.destination as? GlossaryDetailsVC,
let section = tableView.indexPathForSelectedRow?.section, let row = tableView.indexPathForSelectedRow?.row {
let subCategoryList = Array(subCategorySet)
let glossaryList = glossarysDictionary[subCategoryList[section]]
let glossarys = glossaryList?[row]
viewGlossaryDetailsVC.glossarys = glossarys
}
}
}
extension GlossaryVC: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
if !searchText.isEmpty {
filteredGlossarys = glossarys.filter({ (glossary) -> Bool in
let glossaryTitleRange = glossary.glossaryTitle?.range(of: searchText, options: .caseInsensitive)
let glossaryDescriptionRange = glossary.glossaryDescription?.range(of: searchText, options: .caseInsensitive)
let glossaryKeywordsRange = glossary.glossaryKeywords?.range(of: searchText, options: .caseInsensitive)
return glossaryTitleRange != nil || glossaryDescriptionRange != nil || glossaryKeywordsRange != nil
})
} else {
filteredGlossarys = glossarys
}
groupGlossarys()
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
searchBar.resignFirstResponder()
}
}
到目前为止，我已经在sorted(by: {})中的let subCategoryList = Array(subCategorySet)上尝试了titleForHeaderInSection方法，该方法的确按字母顺序排列了节标题，但数据没有改变。因此，您最终在“ A”子类别中有以“ H”开头的单词。
根据数据库中的“字母”键对数据进行分组，例如，因此将所有“ A”分组在一起，等等。
任何帮助将不胜感激，我所要做的就是按字母顺序对它进行排序，我觉得自己的深度有点不足。我仍然使用Swift 3，因为这对我来说是个人的爱好。
您可以尝试这个：
self.glossarys.sorted { $0.offences < $0.offences }
希望有帮助...