ios - 将浮点数转换为货币字符串格式化程序的问题

Question

转换器 Swift 4.2 的扩展

extension Float {
    var localeCurrency: String {
        let formatter = NumberFormatter()
        formatter.numberStyle = .currency
        formatter.locale = .current
        return formatter.string(from: self as NSNumber)!
    }
}

访问值

 let   amount = 200.02
    print("Amount Saved Value ",String(format:"%.2f", amountSaving. localeCurrency))

对我来说它的回报是 0.00！在我看来，Extension Perfect 访问时返回 0.00！为什么？