SwiftUI是否有一个带有键入功能的选择器来过滤大列表?

用SwiftUI编写的单个过滤列表:

let animals = ["Cat", "Camel", "Dog", "Crocodile"]

struct ContentView: View {
    
    @State private var searchString = ""
    
    var body: some View {
        VStack {
            TextField("Search", text: $searchString)
            List(animals.filter({searchString == "" ? true : $0.contains(searchString)}), id: \.self) { animal in
                Text(animal)
            }
        }
    }
}

您可以根据需要增加模型的复杂性,并应用列表选择(请参阅SwiftUI的文档)。要支持选择,请执行以下操作:

struct ContentView: View {
    
    @State private var searchString = ""
    @State private var listSelection: String? = ""
    
    var body: some View {
        VStack {
            TextField("Search", text: $searchString)
            
            List(animals.filter({searchString == "" ? true : $0.contains(searchString)}), id: \.self, selection: $listSelection) { animal in
                
                Text(animal)
                
            }
        }.padding()
        .onChange(of: searchString, perform: { value in
            listSelection = animals.filter({searchString == "" ? true : $0.contains(searchString)}).first
        })
    }
}