Swift 如何使用可搜索在搜索栏中搜索包括>或<

您可以try 此方法，使用修改后的searchResult，例如:

struct Item: Identifiable {
    let id = UUID().uuidString
    let name: String
    let amount: Double
    
    static var samples: [Item] = [
        Item(name: "item 1", amount: 10.9),
        Item(name: "item 2", amount: 50.0),
        Item(name: "item 3", amount: 30.7),
        Item(name: "item 4", amount: -10.9),
        Item(name: "item 5", amount: 80.3),
        Item(name: "item 6", amount: 15.3),
        Item(name: "item 7", amount: 80.0)
    ]
}

struct ContentView: View {
    @State var queryList: [Item] = Item.samples
    @State var searchQuery = ""
    
   var searchResult: [Item] {
    // remove any blank spaces
    let search = searchQuery.trimmingCharacters(in: .whitespacesAndNewlines)
    guard !search.isEmpty else {return queryList}

    // extract the operator
    let op = String(search.prefix(1))
    // remove the operator, to get just the value part
    let value = String(search.dropFirst())
    let doubleVal = Double(value) ?? 0.0

    // operator conditions
    if op == ">" {
        return queryList.filter({$0.amount >= doubleVal})
    }
    if op == "<" {
        return queryList.filter({$0.amount <= doubleVal})
    }
    // up to you here
    return queryList.filter({$0.amount == Double(search) ?? 0.0})
}
    
    var body: some View {
        NavigationStack {
            List {
                ForEach(searchResult) { list in
                    HStack {
                        Text(list.name)
                        Spacer()
                        Text("\(list.amount)")
                    }
                }
            }
            .listStyle(.plain)
            .searchable(text: $searchQuery)
        }
        .padding()
    }
}