如何在双向绑定的ViewModel/TextField中保持@Published属性的规范化(比如保持小写，删除链接等)？

@propertyWrapper
struct NormalizedPublished<Value> {
    private var value: Value
    private let normalize: (Value) -> Value

    var wrappedValue: Value {
        get { value }
        set { value = normalize(newValue) }
    }

    init(wrappedValue: Value, normalize: @escaping (Value) -> Value) {
        self.value = normalize(wrappedValue)
        self.normalize = normalize
    }
}

class MyViewModel: ObservableObject {
    @NormalizedPublished(normalize: { $0.lowercased() })
    var text: String = ""
}

struct MyView: View {
    @ObservedObject var viewModel = MyViewModel()

    var body: some View {
        TextField("Enter text", text: $viewModel.text)
    }
}