问题

I've translated the content you provided, focusing on the code parts as you requested. Here's the translated code:

我在使用SwiftUI的Searchable时遇到问题，用于我的数据模型。我从Firestore读取了数据，并保存为GBplayerModel()中的数组。

使用Searchable时，它可以过滤球员列表，但在移除搜索文本时不会返回原始列表视图。

基本上，我希望主视图是可以搜索的完整列表。

数据模型

import Foundation
import Firebase

struct GBplayer: Identifiable {
    var id: String
    var name: String
    var status: String
    var height: String
    var team: String
    var position: String
}

// 用于预览的模拟数据
extension GBplayer {
    static func mock() -> GBplayer {
        GBplayer(id: "Aaron Menzies", name: "Aaron Menzies", status: "Active", height: "7ft 3", team: "Leicester Riders", position: "C")
    }
}

class GBplayerModel: ObservableObject {
    
    @Published var playerList = [GBplayer]()
    
    func getGBplayers() {
           
        // 获取数据库引用
        let db = Firestore.firestore()
        
        db.collection("GBplayers").getDocuments { snapshot, error in
            
            // 检查错误
            if error == nil {
                // 没有错误
                print("您已登录")
                
                if let snapshot = snapshot {
                    
                    // 在主线程中更新列表属性
                    DispatchQueue.main.async {
                        
                        // 获取所有文档并创建球员列表
                        self.playerList = snapshot.documents.map { d in
                            
                            // 为文档中的每个球员创建一个球员结构
                            return GBplayer(id: d.documentID,
                                            name: d["name"] as? String ?? "",
                                            status: d["status"] as? String ?? "",
                                            height: d["height"] as? String ?? "",
                                            team: d["team"] as? String ?? "",
                                            position: d["position"] as? String ?? "")
                        }
                    }
                }
            } else {
                // 处理错误
                print("没有文档")
                return
            }    
        }   
    }    
}

视图

import SwiftUI

struct playerView: View {
    
    @ObservedObject var model = GBplayerModel()
    @State private var searchPlayer = ""
    
    var body: some View {
        
        NavigationView {
            
            List {
                ForEach (model.playerList) { player in
                    
                    NavigationLink  {
                        Text("详细视图")   // 需要在此处添加详细视图
                    } label: {
                        PlayerRow(player: player)
                    }
                }
            }
            .listStyle(.plain)
            .navigationTitle("球员")
            
            // 从Firebase更新数据
            .onAppear() {
                self.model.getGBplayers()                
            }
            
            .searchable(text: $searchPlayer, placement: .navigationBarDrawer(displayMode: .always), prompt: "查找球员")
            
            .onChange(of: searchPlayer) { search in
                if !search.isEmpty {model.playerList = model.playerList.filter { $0.name.contains(searchPlayer) }
                } else {
                    model.playerList = model.playerList
                }
            }
        }  
    }
}

I hope this helps! If you have any further questions or need assistance with specific parts of the code, feel free to ask.

    import Foundation
import Firebase
struct GBplayer: Identifiable {
var id: String
var name: String
var status: String
var height: String
var team: String
var position: String
}
// mock data that we can use for previews  
extension GBplayer {
static func mock()  -> GBplayer {
GBplayer(id: "Aaron Menzies", name: "Aaron Menzies", status: "Active", height: "7ft 3", team: "Leicester Riders", position: "C")
}
}
class GBplayerModel: ObservableObject {
@Published var playerList = [GBplayer]()
func getGBplayers() {
// get reference to the db
let db = Firestore.firestore()
db.collection("GBplayers").getDocuments { snapshot, error in
//check for errors
if error == nil {
// no errors
print("your in")
if let snapshot = snapshot {
// Update the list property in the main thread
DispatchQueue.main.async {
// get all the documents and create list of players
self.playerList = snapshot.documents.map { d in
//create a player struc for each player in the document
return GBplayer(id: d.documentID,
name: d["name"] as? String ?? "",
status: d["status"] as? String ?? "",
height: d["height"] as? String ?? "",
team: d["team"] as? String ?? "",
position: d["position"] as? String ?? "",
}
}
}
} else {
// handle the error
print("No Documents")
return
}    
}   
}    
}

import SwiftUI
struct playerView: View {
@ObservedObject var model = GBplayerModel()
@State private var searchPlayer = ""
var body: some View {
NavigationView {
List {
ForEach (model.playerList) { player in
NavigationLink  {
Text("Detailed View")   //need to add detailed view here     
} label: {
PlayerRow(player: player)
}
}
}
.listStyle(.plain)
.navigationTitle("Players")
// update data from Firebase 
.onAppear() {
self.model.getGBplayers()                
}
.searchable(text: $searchPlayer, placement: .navigationBarDrawer(displayMode: .always), prompt: "Find a player")
.onChange(of: searchPlayer) { search in
if !search.isEmpty {model.playerList = model.playerList.filter { $0.name.contains(searchPlayer) }
} else {
model.playerList = model.playerList
}
}
}
}  
}

答案1

得分: 1

现在，当您搜索时，您正在改变您的 playerList，当您执行以下操作时：

model.playerList = model.playerList.filter { ... }

这意味着如果您更改搜索词（或者将其删除），那些被过滤掉的项目将不再存在。

相反，您应该始终保留完整的 playerList，并且只 显示 一个经过筛选的版本：

var filteredList: [GBplayer] {
  if search.isEmpty {
    return model.playerList
  } else {
    return model.playerList.filter { ... }
  }
}
// ...

ForEach(filteredList) { player in ... }

然后删除您的 onChange 代码。

model.playerList = model.playerList.filter { ... }

var filteredList: [GBplayer] {
if search.isEmpty {
return model.playerList
} else {
return model.playerList.filter { ... }
}
}
// ...
ForEach (filteredList) { player in ... }