如何从 table 视图中显示的搜索结果导航到另一个视图?
How do i navigate to another view from search results displayed in table view?
下面的代码是我的viewController代码。 json 文件中的单词会显示在 table 视图中,单击某个单词会转到显示与该单词关联的元素的另一个页面。但是,当搜索结果显示在 table 视图中时,我无法导航到该页面。
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchResultsUpdating{
@IBOutlet weak var mainTableView: UITableView!
var words = [wordStats]()
var filteredArray = [wordStats]()
var searchController = UISearchController()
var resultsController = UITableViewController()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
getJson {
self.mainTableView.reloadData()
}
mainTableView.delegate = self
mainTableView.dataSource = self
searchController = UISearchController(searchResultsController: resultsController)
mainTableView.tableHeaderView = searchController.searchBar
searchController.searchResultsUpdater = self
resultsController.tableView.delegate = self
resultsController.tableView.dataSource = self
}
func updateSearchResults(for searchController: UISearchController) {
filteredArray = words.filter({ (words: wordStats) -> Bool in
if words.word.contains(searchController.searchBar.text!){
return true
}else{
return false
}
})
resultsController.tableView.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == resultsController.tableView{
return filteredArray.count
}else{
return words.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: .default, reuseIdentifier: nil)
if tableView == resultsController.tableView{
cell.textLabel?.text = filteredArray[indexPath.row].word.capitalized
}else{
cell.textLabel?.text = words[indexPath.row].word.capitalized
}
//cell.textLabel?.text = words[indexPath.row].word.capitalized
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "wordDetails", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? HeroViewController{
destination.word = words[(mainTableView.indexPathForSelectedRow?.row)!]
}
}
func getJson(completed: @escaping () -> ()){
let path = Bundle.main.path(forResource: "week_14", ofType: "json")
let url = URL(fileURLWithPath: path!)
let data = try! Data(contentsOf: url)
do {
self.words = try JSONDecoder().decode([wordStats].self, from: data)
DispatchQueue.main.async{
completed()
}
}catch{
print("JSON error")
}
}
}
最初从 JSON 文件中获取数据后,数据显示在 mainTableView 中,但在我单击该项目时搜索后,应用程序崩溃了。有人可以帮我吗?
struct wordStats:Decodable{
let word: String
let synonym: String
let meaning: String
let example: String
let video: String
}
这是 wordStats
Post 崩溃日志。根据我们所掌握的信息,我的猜测是您在 prepareForSegue
中崩溃了:
destination.word = words[(mainTableView.indexPathForSelectedRow?.row)!]
可能是使用筛选结果时出现索引错误。这可能会解决它:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? HeroViewController{
if tableView == resultsController.tableView {
destination.word = filteredArray[(mainTableView.indexPathForSelectedRow?.row)!]
} else {
destination.word = words[(mainTableView.indexPathForSelectedRow?.row)!]
}
}
}
这就是最终起作用的方法
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? HeroViewController {
if let indexPath = mainTableView.indexPathForSelectedRow{
if isFiltering(){
destination.word = filteredArray[indexPath.row]
}else{
destination.word = words[indexPath.row]
}
}
}
}
下面的代码是我的viewController代码。 json 文件中的单词会显示在 table 视图中,单击某个单词会转到显示与该单词关联的元素的另一个页面。但是,当搜索结果显示在 table 视图中时,我无法导航到该页面。
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchResultsUpdating{
@IBOutlet weak var mainTableView: UITableView!
var words = [wordStats]()
var filteredArray = [wordStats]()
var searchController = UISearchController()
var resultsController = UITableViewController()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
getJson {
self.mainTableView.reloadData()
}
mainTableView.delegate = self
mainTableView.dataSource = self
searchController = UISearchController(searchResultsController: resultsController)
mainTableView.tableHeaderView = searchController.searchBar
searchController.searchResultsUpdater = self
resultsController.tableView.delegate = self
resultsController.tableView.dataSource = self
}
func updateSearchResults(for searchController: UISearchController) {
filteredArray = words.filter({ (words: wordStats) -> Bool in
if words.word.contains(searchController.searchBar.text!){
return true
}else{
return false
}
})
resultsController.tableView.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == resultsController.tableView{
return filteredArray.count
}else{
return words.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: .default, reuseIdentifier: nil)
if tableView == resultsController.tableView{
cell.textLabel?.text = filteredArray[indexPath.row].word.capitalized
}else{
cell.textLabel?.text = words[indexPath.row].word.capitalized
}
//cell.textLabel?.text = words[indexPath.row].word.capitalized
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "wordDetails", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? HeroViewController{
destination.word = words[(mainTableView.indexPathForSelectedRow?.row)!]
}
}
func getJson(completed: @escaping () -> ()){
let path = Bundle.main.path(forResource: "week_14", ofType: "json")
let url = URL(fileURLWithPath: path!)
let data = try! Data(contentsOf: url)
do {
self.words = try JSONDecoder().decode([wordStats].self, from: data)
DispatchQueue.main.async{
completed()
}
}catch{
print("JSON error")
}
}
}
最初从 JSON 文件中获取数据后,数据显示在 mainTableView 中,但在我单击该项目时搜索后,应用程序崩溃了。有人可以帮我吗?
struct wordStats:Decodable{
let word: String
let synonym: String
let meaning: String
let example: String
let video: String
}
这是 wordStats
Post 崩溃日志。根据我们所掌握的信息,我的猜测是您在 prepareForSegue
中崩溃了:
destination.word = words[(mainTableView.indexPathForSelectedRow?.row)!]
可能是使用筛选结果时出现索引错误。这可能会解决它:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? HeroViewController{
if tableView == resultsController.tableView {
destination.word = filteredArray[(mainTableView.indexPathForSelectedRow?.row)!]
} else {
destination.word = words[(mainTableView.indexPathForSelectedRow?.row)!]
}
}
}
这就是最终起作用的方法
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? HeroViewController {
if let indexPath = mainTableView.indexPathForSelectedRow{
if isFiltering(){
destination.word = filteredArray[indexPath.row]
}else{
destination.word = words[indexPath.row]
}
}
}
}