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L'app mostra un elenco di parti di automobili (parte dell'automobile, tipo, anno, paese) che sta funzionando in una vista tabella con una barra di ricerca.Aggiunta di Scope Bar in swift
Ora ho deciso di aggiungere una barra di ambito per filtrare i risultati, e sono sicuro che ho incasinato il codice. Ci sono molti errori nelle righe per aggiungere scopeBar. Sono le ultime 20 righe, dopo il commento //ScopeBar try, oltre a quest'ultima righe ho aggiunto un codice nello viewDidLoad() per mostrare i titoli che voglio.
Cosa sto sbagliando? Qualsiasi aiuto è più che benvenuto, sto cercando di risolvere questo problema già da 2 giorni senza fortuna.
import UIKit
import CoreData
class DictionaryTableViewController: UITableViewController, NSFetchedResultsControllerDelegate, UISearchResultsUpdating
{
var searchController:UISearchController!
var searchResults:[Dictionary] = []
private var dictionaryItems:[Dictionary] = []
private var cockpitDict = [String: [Dictionary]]()
var sectionTitles = [String]()
var fetchResultController:NSFetchedResultsController!
override func viewDidLoad() {
super.viewDidLoad()
// ScopeBar Try
searchController.searchBar.scopeButtonTitles = ["All", "type", "year", "country"]
tableView.tableHeaderView = searchController.searchBar
// Load menu items from database
if let managedObjectContext = (UIApplication.sharedApplication().delegate as? AppDelegate)?.managedObjectContext {
let fetchRequest = NSFetchRequest(entityName: "DictionaryEntity")
do {
dictionaryItems = try managedObjectContext.executeFetchRequest(fetchRequest) as! [Dictionary]
} catch {
print("Failed to retrieve record")
print(error)
}
}
searchController = UISearchController(searchResultsController: nil)
tableView.tableHeaderView = searchController.searchBar
searchController.searchResultsUpdater = self
searchController.dimsBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "Search ..."
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style:
.Plain, target: nil, action: nil)
// Enable self sizing cells
tableView.estimatedRowHeight = 100.0
tableView.rowHeight = UITableViewAutomaticDimension
createCockpitDict()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func createCockpitDict(){
for item in dictionaryItems {
guard let word = item.word else {
break
}
// Get the first letter of the word and build the dictionary
let wordKey = word.substringToIndex(word.startIndex.advancedBy(1))
if var cockpitItems = cockpitDict[wordKey] {
cockpitItems.append(item)
cockpitDict[wordKey] = cockpitItems
} else {
cockpitDict[wordKey] = [item]
}
}
// Get the section titles from the dictionary's keys and sort them in ascending order
sectionTitles = [String](cockpitDict.keys)
sectionTitles = sectionTitles.sort({ $0 < $1 })
}
// create a standard way to get a Dictionary from a index path
func itemForIndexPath (indexPath: NSIndexPath) -> Dictionary? {
var result: Dictionary? = nil
if searchController.active {
result = searchResults[indexPath.row]
}else{
let wordKey = sectionTitles[indexPath.section]
if let items = cockpitDict[wordKey]{
result = items[indexPath.row]
}
}
return result
}
// MARK: - Table view data source
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return sectionTitles[section]
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
//assume a single section after a search
return (searchController.active) ? 1 : sectionTitles.count
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if searchController.active {
return searchResults.count
} else {
// Return the number of rows in the section.
let wordKey = sectionTitles[section]
if let items = cockpitDict[wordKey] {
return items.count
}
return 0
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! DictionaryTableViewCell
//let dictionary = (searchController.active) ? searchResults[indexPath.row]: dictionaryItems[indexPath.row]
if let dictionary = itemForIndexPath(indexPath){
cell.wordLabel.text = dictionary.word
cell.definitionSmallLabel.text = dictionary.definition
cell.typeLabel.text = dictionary.type
cell.yearLabel.text = dictionary.year
cell.countryLabel.text = dictionary.country
}else{
print("Cell error with path\(indexPath)")
}
return cell
}
override func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
return sectionTitles
}
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
if searchController.active{
return false
}else{
return true
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showDictionaryDetail" {
if let indexPath = tableView.indexPathForSelectedRow {
let destinationController = segue.destinationViewController as! DictionaryDetailViewController
if let dictionary = itemForIndexPath(indexPath){
destinationController.dictionary = dictionary
}else{
print("Segue error with path \(indexPath)")
}
searchController.active = false
}
}
}
func updateSearchResultsForSearchController(searchController: UISearchController) {
if let searchText = searchController.searchBar.text {
filterContentForSearchText(searchText)
tableView.reloadData()
}
}
func filterContentForSearchText(searchText: String) {
searchResults = dictionaryItems.filter({ (dictionary:Dictionary) -> Bool in
let wordMatch = dictionary.word!.rangeOfString(searchText, options:
NSStringCompareOptions.CaseInsensitiveSearch)
return wordMatch != nil
})
}
}
//ScopeBar try: all lines below got many errors I can not figure out how to fix it :(
func filterContentForSearchText(searchText: String, scope: String = "All") {
dictionaryItems = cockpitDict.filter({(cockpitDict : Dictionary) -> Bool in
let categoryMatch = (scope == "All") || (cockpitDict.category == scope)
return categoryMatch && cockpitDict.name.lowercaseString.containsString(searchText.lowercaseString)
})
tableView.reloadData()
}
extension DictionaryTableViewController:UISearchBarDelegate {
// MARK: - UISearchBar Delegate
func searchBar(searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {
filterContentForSearchText(searchBar.text!, scope: searchBar.scopeButtonTitles![selectedScope])
}
}
extension DictionaryTableViewController: UISearchResultsUpdating {
// MARK: - UISearchResultsUpdating Delegate
func updateSearchResultsForSearchController(searchController: UISearchController) {
let searchBar = searchController.searchBar
let scope = searchBar.scopeButtonTitles![searchBar.selectedScopeButtonIndex]
filterContentForSearchText(searchController.searchBar.text!, scope: scope)
}
}
Quale versione di Swift stai usando? Anche 'var searchResults: [Dictionary] = []' non viene compilato per me. Forse il primo passo è aggiornare alla versione corrente di Swift. –
@ Dave Batton la mia versione xcode è la 7.2.1 (7C1002) l'ultima versione disponibile. –
@Jade di sicuro non capirai il motivo per cui il tuo codice non funziona, in quanto non viene nemmeno compilato. Correggi i tuoi errori del compilatore e poi vediamo cosa c'è di sbagliato nel tuo codice – EridB