本文介绍了从表视图问题快速搜索动态数据问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在表格视图上方有一个搜索栏.表格视图中的数据来自我的服务.我正在尝试在表格视图数据上应用搜索过滤器.我已经尝试了一些代码，但是没有用.我的搜索栏代码是这样，
I have a search bar above my table view. The data in table view is coming from my service. I'm trying to apply search filter on the table view data. I have tried some code but it isn't working. My code for searchbar is this,
UIViewController,UISearchBarDelegate,UITextFieldDelegate,UITextViewDelegate,ShowsAlert
@IBOutlet weak var searchBar: UISearchBar!
var filteredData = [String]()
var isSearching = false
var dishNameArray = [String]()
override func viewDidLoad() {
super.viewDidLoad()
menuView.isHidden = true
reviewView.isHidden = true
infoView.isHidden = true
scrollView.isScrollEnabled = false
//TableView Delegates
menuTableView.delegate = self
menuTableView.dataSource = self
reviewTableView.delegate = self
reviewTableView.dataSource = self
reviewTableView.reloadData()
searchBar.delegate = self
searchBar.returnKeyType = UIReturnKeyType.done
segmentControl.tintColor = #colorLiteral(red: 0.9529120326, green: 0.3879342079, blue: 0.09117665142, alpha: 1)
searchBar.delegate = self
dishNameLbl.text = name
dishDescripLbl.text = resDesc
minOrderLbl.text = minOrder
deliveryLbl.text = deliveryTime
}
private func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
isSearching = true
}
private func searchBarTextDidEndEditing(searchBar: UISearchBar) {
isSearching = false
}
private func searchBarCancelButtonClicked(searchBar: UISearchBar) {
isSearching = false
}
private func searchBarSearchButtonClicked(searchBar: UISearchBar) {
isSearching = false
}
private func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
guard let searchText = searchBar.text else {
isSearching = false
return
}
filteredData = dishNameArray.filter({
return $0.lowercased().contains(searchText.lowercased())
})
isSearching = filteredData.count > 0
self.menuTableView.reloadData()
}
extension RestaurantMenuVC: UITableViewDelegate,UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == menuTableView{
if isSearching{
return filteredData.count
}
return ResMenuService.instance.categoryModelInstance.count
}
else{
return AllReviewsService.instance.allReviewsModel.count
}
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if tableView == menuTableView{
return 57
}
else{
return 137
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if tableView == menuTableView{
let cell = menuTableView.dequeueReusableCell(withIdentifier: "menuCell", for: indexPath) as! RestaurantMenuTableViewCell
if isSearching{
cell.dishTitleLbl.text = filteredData[indexPath.row]
dishNameArray.append(cell.dishTitleLbl.text!)
}
// let cell = menuTableView.dequeueReusableCell(withIdentifier: "menuCell", for: indexPath) as! RestaurantMenuTableViewCell
cell.dishTitleLbl.text = ResMenuService.instance.categoryModelInstance[indexPath.row].categoryName
cell.cardView.layer.cornerRadius = 5
cell.selectionStyle = .none
return cell
}
else
{
let cell = reviewTableView.dequeueReusableCell(withIdentifier: "reviewCell", for: indexPath) as! AllReviewsTableViewCell
cell.nameLbl.text = AllReviewsService.instance.allReviewsModel[indexPath.row].name
cell.descriptionLbl.text = AllReviewsService.instance.allReviewsModel[indexPath.row].description
cell.timeLbl.text = AllReviewsService.instance.allReviewsModel[indexPath.row].time
cell.ratingView.rating = Double(AllReviewsService.instance.allReviewsModel[indexPath.row].rating)
cell.backgroundColor = UIColor.clear
cell.selectionStyle = .none
return cell
}
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if tableView == menuTableView{
let minimumSpending = String(ResMenuService.instance.restaurntDetailModelInstance[indexPath.row].minimumSpending)
UserDefaults.standard.set(minimumSpending, forKey: "minimumSpending")
UserDefaults.standard.synchronize()
let categoryModel = ResMenuService.instance.categoryModelInstance
let subCategoryModel = ResMenuService.instance.categoryModelInstance[indexPath.row].subCategories
let AddonCategoryModel = ResMenuService.instance.categoryModelInstance[indexPath.row].subCategories[0].items[0].addonCategory
// if categoryId == subCategoryId{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "RestaurantMenuDetailVC") as! RestaurantMenuDetailVC
vc.categoryModel = categoryModel
vc.subCategoryModel = subCategoryModel
vc.AddonCategoryModel = AddonCategoryModel
self.navigationController?.pushViewController(vc, animated: true)
//}
}
else{
print("Hello")
}
}
}
但是当我键入某些内容时，它不会过滤数据.这是我的模型课，
But when i type something it does not filter the data. here is my model class,
struct RestaurantDetailModel {
public private(set) var restaurantId:String!
public private(set) var shopLat:String!
public private(set) var shopLng:String!
public private(set) var street:String!
public private(set) var town:String!
public private(set) var zipCode:String!
public private(set) var cellNo:String!
public private(set) var landLine:Int!
public private(set) var shopName:String!
public private(set) var deliveryTime:Int!
public private(set) var collectionTime:Int!
public private(set) var facebookLink:String!
public private(set) var twitterLink:String!
public private(set) var googleLink:String!
public private(set) var instagramLink:String!
public private(set) var pinterestLink:String!
public private(set) var address:String!
public private(set) var preorderPref:String!
public private(set) var orderStatus:Bool!
public private(set) var minimumSpending:Int!
public private(set) var restaurantTimings:[RestaurantTimingsModel]!
}
推荐答案
您没有在任何地方将isSearching设置为true.因此，它总是错误.
You dont set isSearching to true anywhere. So it is always false.
因此，在您设置 isSearching = true
func updateSearchResults(用于searchController:UISearchController)是一种UISearchControllerDelegate方法.由于您没有使用UISearchController，因此在您的情况下将不会调用此方法.您需要使用UISearchBarDelegate函数.
func updateSearchResults(for searchController: UISearchController) is a UISearchControllerDelegate method. As you are not using a UISearchController this will not be called in your case. You need to be using the UISearchBarDelegate functions.
尝试以下更改.使用的参考
在viewDidLoad中添加以下行:
in viewDidLoad add the following line:
searchBar.delegate = self
添加以下功能:
func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
isSearching = true
}
func searchBarTextDidEndEditing(searchBar: UISearchBar) {
isSearching = false
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
isSearching = false
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
isSearching = false
}
将您的updateSearchResults函数更改为此:
Change your updateSearchResults function to this:
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
guard let searchText = searchBar.text else {
isSearching = false
return
}
filteredData = dishNameArray.filter({
return $0.lowercased().contains(searchText.lowercased())
})
isSearching = filteredData.count > 0
self.menuTableView.reloadData()
}
您还需要使ViewController符合 UISearchBarDelegate ，因此添加它，就像这样:
You also need to make your ViewController conform to UISearchBarDelegate so add it, something like this:
class ViewController: UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate
使用UISearchController时，这要容易得多.请参见下面的示例.
This is much easier when using a UISearchController. See the example below.
使用UISearchController的示例:
我刚刚将这个示例放在一个操场上，展示了如何使用UISearchController进行操作.
I have just put this example together in a playground which shows how to do this with a UISearchController.
import UIKit
import PlaygroundSupport
class ViewController: UITableViewController {
let searchController = UISearchController(searchResultsController: nil)
var names = [
"John",
"Terry",
"Martin",
"Steven",
"Michael",
"Thomas",
"Jason",
"Matthew"
]
var filteredNames = [String]()
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Search Example"
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "Search"
navigationItem.searchController = searchController
definesPresentationContext = true
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isFiltering() {
return filteredNames.count
} else {
return names.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell() // don't do this, i am for example.
var name: String
if isFiltering() {
name = filteredNames[indexPath.row]
} else {
name = names[indexPath.row]
}
cell.textLabel?.text = name
return cell
}
func searchBarIsEmpty() -> Bool {
// Returns true if the text is empty or nil
return searchController.searchBar.text?.isEmpty ?? true
}
func isFiltering() -> Bool {
return searchController.isActive && !searchBarIsEmpty()
}
func filterContentForSearchText(_ searchText: String, scope: String = "All") {
filteredNames = names.filter({( name : String) -> Bool in
return name.lowercased().contains(searchText.lowercased())
})
tableView.reloadData()
}
}
extension ViewController: UISearchResultsUpdating {
func updateSearchResults(for searchController: UISearchController) {
filterContentForSearchText(searchController.searchBar.text!)
}
}
let vc = ViewController()
let nav = UINavigationController()
nav.viewControllers = [vc]
PlaygroundPage.current.liveView = nav
工作SearchBar
import UIKit
import PlaygroundSupport
class ViewController: UITableViewController, UISearchBarDelegate {
var searchBar: UISearchBar!
var isFiltering = false
var names = [
"John",
"Terry",
"Martin",
"Steven",
"Michael",
"Thomas",
"Jason",
"Matthew"
]
var filteredNames = [String]()
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Search Example"
searchBar = UISearchBar(frame: CGRect(x: 0, y: 0, width: tableView.frame.width, height: 50))
searchBar.delegate = self
tableView.tableHeaderView = UIView(frame: CGRect(x: 0, y: 0, width: tableView.frame.width, height: 50))
tableView.tableHeaderView?.addSubview(searchBar)
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
isFiltering = false
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
isFiltering = false
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
isFiltering = true
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
isFiltering = false
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
guard let searchText = searchBar.text else {
isFiltering = false
return
}
filteredNames = names.filter({
return $0.lowercased().contains(searchText.lowercased())
})
isFiltering = filteredNames.count > 0
self.tableView.reloadData()
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isFiltering {
return filteredNames.count
} else {
return names.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell() // don't do this, i am for example.
var name: String
if isFiltering {
name = filteredNames[indexPath.row]
} else {
name = names[indexPath.row]
}
cell.textLabel?.text = name
return cell
}
}
let vc = ViewController()
PlaygroundPage.current.liveView = vc
提供的新信息
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
guard let searchText = searchBar.text else {
isFiltering = false
return
}
filteredData = ResMenuService.instance.categoryModelInstance.filter({
return $0.categoryName.lowercased().contains(searchText.lowercased())
})
isFiltering = filteredData.count > 0
self.tableView.reloadData()
}
这篇关于从表视图问题快速搜索动态数据问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！