Search 搜索文本在谓词SwiftUI中没有响应

searchText更改不会更改谓词输入，因此无论我在搜索栏中键入什么，我都会在核心数据中获得所有提醒

我希望我的列表根据搜索栏中键入的文本进行更改

这是我的搜索视图

struct SearchView: View {
    @Environment(\.managedObjectContext) private var viewContext
    @FetchRequest var reminder: FetchedResults<CDReminder>
    @State var searchText: String = ""
    
    init(searchText: State<String>) {
        self._searchText = searchText
        var predicate : NSPredicate?
        if !self._searchText.wrappedValue.isEmpty{
            predicate = NSPredicate(format: "name CONTAINS %@", self._searchText.wrappedValue)
        }
        self._reminder = FetchRequest(
            entity: CDReminder.entity(),
            sortDescriptors: [],
            predicate: predicate
        )
    }
    var body: some View {
         VStack {
       SearchBar(text: searchText)
       List {
        ForEach(self._reminder.wrappedValue.filter({
            self.searchText.isEmpty ? true :
         $0.notes!.localizedCaseInsensitiveContains(self.searchText)
            }), id: \.self){ reminder in
            DatedReminderCell(reminder: reminder, isSelected: false, 
           onComplete: {})
            }
         }
      }
    }
}

---

我创建了另一个名为FilteredList的视图。在这个视图中，我获取了所有的提醒，然后用谓词过滤它们

 import SwiftUI
import CoreData

struct FilteredList: View {
    var fetchRequest: FetchRequest<CDReminder>
    var reminders: FetchedResults<CDReminder> {fetchRequest.wrappedValue}
    var body: some View {
        List(fetchRequest.wrappedValue , id: \.self) { reminder in
            DatedReminderCell(reminder: reminder, isSelected: false, onComplete: {})
        }
    }
    
    init(filter: String) {
        fetchRequest = FetchRequest<CDReminder>(
            entity: CDReminder.entity(),
            sortDescriptors: [],
            predicate: NSPredicate(format: "title CONTAINS %@", filter.lowercased())
        )
    }
}

---

所以现在，当我在搜索栏中输入文本时，我会同时看到相关的提醒。

SearchView和SearchBar没有绑定“searchText”属性。因此，SearchView不知道您在SearchBar中键入的内容。此外，如果您绑定它们，您仍然需要在“SearchView”中发出新的获取请求要获取更新的结果，将不会再次调用init（）。

 import SwiftUI
import CoreData

struct FilteredList: View {
    var fetchRequest: FetchRequest<CDReminder>
    var reminders: FetchedResults<CDReminder> {fetchRequest.wrappedValue}
    var body: some View {
        List(fetchRequest.wrappedValue , id: \.self) { reminder in
            DatedReminderCell(reminder: reminder, isSelected: false, onComplete: {})
        }
    }
    
    init(filter: String) {
        fetchRequest = FetchRequest<CDReminder>(
            entity: CDReminder.entity(),
            sortDescriptors: [],
            predicate: NSPredicate(format: "title CONTAINS %@", filter.lowercased())
        )
    }
}

var body: some View {
    VStack{
        SearchBar(text: $searchText)
            .environment(\.managedObjectContext, viewContext)
        FilteredList(filter: searchText)
    }
}