Swiftui 快捷键-搜索栏
我有以下名为SearchBar.swift的文件:Swiftui 快捷键-搜索栏,swiftui,Swiftui,我有以下名为SearchBar.swift的文件: import SwiftUI struct SearchBar: UIViewRepresentable { @Binding var text: String class Coordinator: NSObject, UISearchBarDelegate { @Binding var text: String init(text: Binding<String>) {
import SwiftUI
struct SearchBar: UIViewRepresentable {
@Binding var text: String
class Coordinator: NSObject, UISearchBarDelegate {
@Binding var text: String
init(text: Binding<String>) {
_text = text
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
text = searchText
}
}
func makeCoordinator() -> Coordinator {
return Coordinator(text: $text)
}
func makeUIView(context: UIViewRepresentableContext<SearchBar>) -> UISearchBar {
let searchBar = UISearchBar(frame: .zero)
searchBar.delegate = context.coordinator
return searchBar
}
func updateUIView(_ uiView: UISearchBar,
context: UIViewRepresentableContext<SearchBar>) {
uiView.text = text
}
}
但是我还没有找到在列表中实现搜索的方法
我计划做一些类似的事情:
ForEach(self.lokaData.filter {
self.searchText.isEmpty ? true : $0.contains(self.searchText)
}, id: \.self)
但它不起作用。我遗漏了一些我不理解的概念。有什么想法吗
谢谢大家! 您正在应用于一个结构,这就是为什么会出现该错误,您应该将其应用于Geolokation
的一个属性,下面是一个在latitud上查找匹配项的示例:
struct MyView: View {
@State private var lokaData = [Geolokation.init(date: "date 1", id: "0", latitude: "1010", longitude: "2020", seq_number: "1234", accuracy: ""),
Geolokation.init(date: "date 2", id: "1", latitude: "1020", longitude: "2030", seq_number: "5678", accuracy: ""),
Geolokation.init(date: "date 3", id: "2", latitude: "1030", longitude: "2040", seq_number: "9101", accuracy: "")]
var body: some View {
VStack {
//SearchBar
ForEach(self.lokaData.filter {
$0.latitude.contains(self.searchText)
}, id: \.self) { item in
Text(item.latitude)
}
}
}
}
您正在应用于一个结构,这就是为什么会出现该错误,您应该将其应用于Geolokation
的一个属性,下面是一个在latitud上查找匹配项的示例:
struct MyView: View {
@State private var lokaData = [Geolokation.init(date: "date 1", id: "0", latitude: "1010", longitude: "2020", seq_number: "1234", accuracy: ""),
Geolokation.init(date: "date 2", id: "1", latitude: "1020", longitude: "2030", seq_number: "5678", accuracy: ""),
Geolokation.init(date: "date 3", id: "2", latitude: "1030", longitude: "2040", seq_number: "9101", accuracy: "")]
var body: some View {
VStack {
//SearchBar
ForEach(self.lokaData.filter {
$0.latitude.contains(self.searchText)
}, id: \.self) { item in
Text(item.latitude)
}
}
}
}
什么不起作用?告诉我们错误。并从ForEach中删除id参数。Geolokation已经符合Identified,因此您不需要手动指定其id。-错误:“类型为'Geolokation'的值没有成员'contains'”“什么不起作用?”?告诉我们错误。并从ForEach中删除id参数。Geolokation已经符合Identified,因此您无需手动指定其id。-错误为:“类型为'Geolokation'的值没有成员'contains'”