如何获取集合视图来控制表格视图中的搜索结果？
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【中文标题】如何获取集合视图来控制表格视图中的搜索结果？【英文标题】：How get collection view to controls search results in tableview? 【发布时间】：2019-12-27 21:57:15 【问题描述】：我一直在尝试通过我的表格视图上方的集合视图来索引我的搜索结果，以便当我在集合视图中按下一个单元格时，它可以索引表格中的结果，如下图所示
到目前为止，代码的工作原理是，一旦我在集合视图中按下一个单元格，它就会将所选类别的文本放在搜索栏中并获得搜索结果，但不久之后模拟器就会崩溃我的错误 Thread 1: Fatal error: Index out of range on cell.configure(withProduct: itemInventory[indexPath.row]) in the cellForRowAt in tableview
提前感谢您的帮助
import UIKit
import Firebase
import FirebaseFirestore
class HomeController: UIViewController
@IBOutlet weak var searchBar: UISearchBar!
@IBOutlet weak var collectionView: UICollectionView!
@IBOutlet weak var tableView: UITableView!
var categorys: [Category] = []
var searchActive : Bool = false
var itemInventory: [ItemList] = []
var itemSetup: [ItemList] = []
override func viewDidLoad()
super.viewDidLoad()
categorys = Category.createCategoryArray()
searchBar.delegate = self
// fetches Firebase Data
func fetchProducts(_ completion: @escaping ([ItemList]) -> Void)
let ref = Firestore.firestore().collection("products")
ref.addSnapshotListener (snapshot, error) in
guard error == nil, let snapshot = snapshot, !snapshot.isEmpty else
return
completion(snapshot.documents.compactMap( ItemList(dictionary: $0.data()) ))
extension HomeController: UITableViewDelegate, UITableViewDataSource
func numberOfSections(in tableView: UITableView) -> Int
return 1
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
if searchBar.text != ""
return self.itemInventory.count
return itemSetup.count
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
guard let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell") as ItemCell else return UITableViewCell()
//search not empty
if searchBar.text != ""
cell.configure(withProduct: itemInventory[indexPath.row])
else
cell.configure(withProduct: itemSetup[indexPath.row])
return cell
extension HomeController: UICollectionViewDelegate, UICollectionViewDataSource
func numberOfSections(in collectionView: UICollectionView) -> Int
return 1
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
return categorys.count
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CategoryCell", for: indexPath) as! CategoryCell
let category = categorys[indexPath.row]
cell.setCategory(category: category)
return cell
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CategoryCell", for: indexPath) as! CategoryCell
let category = categorys[indexPath.row]
cell.setCategory(category: category)
print("\(category): \(cell.categoryLbl.text!)")
searchBar.text = cell.categoryLbl.text! //added this so I could get the search results from pressing a cell in the collection view
extension HomeController : UISearchBarDelegate, UISearchDisplayDelegate
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String)
productInventory = self.itemSetup.filter( (products) -> Bool in
return products.name.range(of: searchText, options: [ .caseInsensitive, .diacriticInsensitive ]) != nil ||
products.category.range(of: searchText, options: [ .caseInsensitive, .diacriticInsensitive ]) != nil
)
self.tableView.reloadData()
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar)
searchActive = true;
func searchBarTextDidEndEditing(_ searchBar: UISearchBar)
searchActive = false;
self.searchBar.endEditing(true)
func searchBarCancelButtonClicked(_ searchBar: UISearchBar)
searchActive = false;
self.searchBar.endEditing(true)
func searchBarSearchButtonClicked(_ searchBar: UISearchBar)
searchActive = false;
self.searchBar.endEditing(true)
class CategoryCell: UICollectionViewCell
@IBOutlet weak var categoryLbl: UILabel!
@IBOutlet weak var categoryView: UIView!
func setCategory(category: Category)
categorylbl.text = category.categoryLabel
import UIKit
import SDWebImage
import Firebase
class ItemCell: UITableViewCell
weak var product: ProductList!
weak var infoDelegate: InfoDelegate?
var addActionHandler: ((Int) -> Void)?
@IBOutlet weak var productImage: UIImageView!
@IBOutlet weak var productName: UILabel!
@IBOutlet weak var categoryLabel: UILabel!
func configure(withProduct product: ProductList)
productName.text = product.name
categoryLabel.text = product.category
productImage.sd_setImage(with: URL(string: product.imageUrl))
override func layoutSubviews()
super.layoutSubviews()
class Category
var categoryLabel: String
init(categoryLabel: String)
self.categoryLabel = categoryLabel
class func createCategoryArray() -> [Category]
var categorys: [Category] = []
let category1 = Category(categoryLabel: "All")
let category2 = Category(categoryLabel: "Veggies")
let category3 = Category(categoryLabel: "Fruit")
let category4 = Category(categoryLabel: "Bread")
let category5 = Category(categoryLabel: "Drinks")
let category6 = Category(categoryLabel: "Dairy")
categorys.append(category1)
categorys.append(category2)
categorys.append(category3)
categorys.append(category4)
categorys.append(category5)
categorys.append(category6)
return categorys
enum Cats: String
case all = "" //to get all results in search
case fruit = "Fruit"
case veggies = "Veggies"
case bread = "Bread"
case drinks = "Drinks"
case dairy = "Dairy"
import Foundation
import UIKit
import Firebase
import FirebaseFirestore
class ItemList
var id: String
var name: String
var category: String
var imageUrl: String
Init(id: String,
name: String,
category: String,
imageUrl: String)
self.id = id
self.name = name
self.category = category
self.imageUrl = imageUrl
convenience init(dictionary: [String : Any])
let id = dictionary["id"] as? String ?? ""
let name = dictionary["name"] as? String ?? ""
let category = dictionary["category"] as? String ?? ""
let imageUrl = dictionary["imageUrl"] as? String ?? ""
self.init(id: id,
name: name,
category: category,
imageUrl: imageUrl)
【问题讨论】：
【参考方案1】：这可能是因为您将过滤后的数组设置为productInventory，这在 Cell for row 中没有使用。
【讨论】：
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