Swift NumberFormatter 如果值为 0 return 空字符串

Question

我有以下代码：

struct Food {
    var name: String
    var energy: Float = 0
    var water: Float = 0
}

struct FoodItemView: View {
    
    @State var newFoodItem = Food(name: "")
    private var numberFormatter = NumberFormatter()

    var body: some View {
        Form {
            Section(header: Text("Basics").fontWeight(.bold)) {
                TextField("Name", text: $newFoodItem.name)
                TextField("Energy (C)", value: $newFoodItem.energy, formatter: numberFormatter)
                .keyboardType(.numberPad)
                TextField("Water (g)", value: $newFoodItem.water, formatter: numberFormatter)
        }
    }
}

如果绑定值为 0，我如何才能使我的 TextFields 中显示的值为空字符串，而不是显式显示 0？

Answer 1

设置 .zeroSymbol 属性共 NumberFormatter。

struct FoodItemView: View {
    
    @State var newFoodItem = Food(name: "")
    private var numberFormatter = NumberFormatter()
    
    init() {
        numberFormatter.zeroSymbol = "" //<< Here
    }

// Other Code

Swift NumberFormatter 如果值为 0 return 空字符串

Swift NumberFormatter if value is 0 return empty string

view

numberformatter

swift

swiftui