searchBar在tableView查询（斯威夫特）

Question

我真的不知道如何解释这就是为什么我把这个标题。但我希望你能理解。截至目前，我的searchBar能够返回结果，但我必须输入完整的名称（例如：为了让searchBar返回EcoBooth结果，我必须键入“EcoBooth”）。 我怎样才能让它仿佛如果我只输入“生态”，它会基于我输入的几个字符串返回EcoBooth？

P.S：看看附加的2张图片了解更多信息。

我的TableView控制器代码

进口的UIKit 进口FirebaseDatabase

var ref: DatabaseReference? 
var databaseHandle: DatabaseHandle? 
var postData = [String]() 
var postData2 = [String]() 
var currentpostDataArray = [String]() 
var tableDataArray = [tableData]() 
var searchArray = [tableData]() 
var inSearchMode = false 

class TableViewController: UITableViewController, UISearchBarDelegate { 


    @IBOutlet var searchBar: UISearchBar! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     setUpSearchBar() 


     ref = Database.database().reference() //set the firebase reference 

     // Retrieve the post and listen for changes 
     databaseHandle = ref?.child("Posts2").observe(.value, with: { (snapshot) in 
      // Code to execute when a child is added under "Posts" 
      postData.removeAll() 
      postData2.removeAll() 
      tableDataArray.removeAll() 

      for child in snapshot.children { 
       let snap = child as! DataSnapshot 
       let key = snap.key 
       let value = String(describing: snap.value!) 
       let rating = (value as NSString).integerValue 

       postData.append(key) 
       postData2.append(value) 

       tableDataArray.append(tableData(boothName: key, boothRating: rating)) 
       currentpostDataArray = postData 
      } 

      self.tableView.reloadData() 


     }) 

    } 


    private func setUpSearchBar() { 
     searchBar.delegate = self 
    } 

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     // #warning Incomplete implementation, return the number of rows 
     return currentpostDataArray.count 
    } 


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
     let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) 

     cell.textLabel?.text = currentpostDataArray[indexPath.row] 
     cell.detailTextLabel?.text = postData2[indexPath.row] + " ♥" 
     cell.detailTextLabel?.textColor = UIColor.red; 
     return cell 
    } 




    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) { 
     searchArray.removeAll() 
     searchArray = tableDataArray 
     currentpostDataArray.removeAll() 
     postData2.removeAll() 
     if !searchText.isEmpty { 
      for data in searchArray { 
      let item = data.boothName 
      if (searchText.lowercased().range(of: item) != nil) || data.boothName.lowercased() == searchText.lowercased() ||     searchText.lowercased().contains(data.boothName.lowercased()) 
       { 
        currentpostDataArray.append(data.boothName) 
        let value = String(describing: data.boothRating) 
        postData2.append(value) 
       } 
      } 
     } 
     if searchText.isEmpty { 
      loadDara() 
     } 
     self.tableView.reloadData() 
    } 



    func searchBar(_ searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) { 
     switch selectedScope { 
     case 0: 
      currentpostDataArray.removeAll() 
      postData2.removeAll() 
      for data in tableDataArray { 
       currentpostDataArray.append(data.boothName) 

       let value = String(describing: data.boothRating) 
       postData2.append(value) 
      } 
      self.tableView.reloadData() 

     case 1: 
      currentpostDataArray.removeAll() 
      postData2.removeAll() 
      let sortedTableData = tableDataArray.sorted(by: { $0.boothRating > $1.boothRating }) 
      for data in sortedTableData { 
       currentpostDataArray.append(data.boothName) 

       let value = String(describing: data.boothRating) 
       postData2.append(value) 
      } 
      self.tableView.reloadData() 

     default: 
      break 

     } 
     tableView.reloadData() 
    } 

    func loadDara() { 
     for data in tableDataArray { 
      currentpostDataArray.append(data.boothName) 

      let value = String(describing: data.boothRating) 
      postData2.append(value) 
     } 

    } 

} 

class tableData { 
    var boothName: String 
    var boothRating: Int 
    init(boothName: String, boothRating: Int) { 
     self.boothName = boothName 
     self.boothRating = boothRating 
    } 
} 

Answer 1

更换

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) { 
    searchArray.removeAll() 
    searchArray = tableDataArray 
    currentpostDataArray.removeAll() 
    postData2.removeAll() 
    if !searchText.isEmpty { 
     for data in searchArray { 
     let item = data.boothName 
     if (searchText.lowercased().range(of: item) != nil) || data.boothName.lowercased() == searchText.lowercased() ||     searchText.lowercased().contains(data.boothName.lowercased()) 
      { 
       currentpostDataArray.append(data.boothName) 
       let value = String(describing: data.boothRating) 
       postData2.append(value) 
      } 
     } 
    } 
    if searchText.isEmpty { 
     loadDara() 
    } 
    self.tableView.reloadData() 
} 

随着迅速filteredArrayUsingPredicate

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) { 
    searchArray.removeAll() 
    searchArray = tableDataArray 
    currentpostDataArray.removeAll() 
    postData2.removeAll() 
    if !searchText.isEmpty { 
     for data in searchArray { 
     let item = data.boothName 
     if (item.lowercased().range(of: searchText.lowercased()) != nil) 
      { 
       currentpostDataArray.append(data.boothName) 
       let value = String(describing: data.boothRating) 
       postData2.append(value) 
      } 
     } 
    } 
    if searchText.isEmpty { 
     loadDara() 
    } 
    self.tableView.reloadData() 
} 

Answer 2

使用NSPredicate从阵列搜索这样的：

let searchPredicate = NSPredicate(format: "boothName CONTAINS[C] %@", searchText) 

resultArr = (filteredArray as NSArray).filtered(using: searchPredicate) 

你可以喜欢这个链接了解更多信息关于NSPredicate也迅速代码示例：http://nshipster.com/nspredicate/