使用环境区域设置时出现 SwiftUI 预览问题

Question

我正在使用一个简单的视图来显示文本NumberFormatter我正在使用一个简单的视图来显示特定区域

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struct CurrencyView: View {\n    let currency:Currency\n    var body: some View {\n        Text(currency.getFormattedCurrency())\n    }\n}\n\nstruct CurrencyView_Previews: PreviewProvider {\n    static var previews: some View {\n        CurrencyView(currency: Currency(currencyValue: 1.0)).previewLayout(.fixed(width: 300.0, height: 55.0)).environment(\\.locale, .init(identifier: "fr_Fr"))\n    }\n}\n\nstruct Currency{\n    let currencyValue:Double\n\n    func getFormattedCurrency() -> String{\n        let formatter = NumberFormatter()\n        formatter.numberStyle = .currency\n        let formatterCurrency =  formatter.string(for: self.currencyValue) ?? ""\n        return formatterCurrency\n    }\n}\n

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我预计预览会显示货币French\xe2\x82\xac 中的货币，正如我在预览中的区域设置中提到的那样。

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Answer 1

这是一个解决方案。使用 Xcode 11.4 进行测试

struct CurrencyView: View {
    @Environment(\.locale) var locale
    let currency:Currency
    var body: some View {
        Text(currency.getFormattedCurrency(for: locale))
    }
}

struct CurrencyView_Previews: PreviewProvider {
    static var previews: some View {
        CurrencyView(currency: Currency(currencyValue: 1.0))
            .environment(\.locale, .init(identifier: "fr_Fr"))
            .previewLayout(.fixed(width: 300.0, height: 55.0))
    }
}

struct Currency{
    let currencyValue:Double

    func getFormattedCurrency(for locale: Locale) -> String{
        let formatter = NumberFormatter()
        formatter.numberStyle = .currency
        formatter.locale = locale
        let formatterCurrency =  formatter.string(for: self.currencyValue) ?? ""
        return formatterCurrency
    }
}