Question

我想要货币代码中的货币符号。例如）EUR - ＆gt; €，USD - ＆gt; $，SEK - ＆gt; kr，DKK - ＆gt; KR

我使用下面的代码来获取货币符号。

from flask import Flask, abort, request
import signal
import threading
import time
import os
import requests
app = Flask(__name__)
shuttingDown = False


def exit_call():
    time.sleep(20)
    requests.post("http://localhost:5420/_shutdown")
    # os._exit(0)


def exit_gracefully(self, signum):
    app.logger.error('Received shutdown signal. Exiting gracefully')
    global shuttingDown
    shuttingDown = True
    # TODO: wait for some time here to ensure we are not receiving any more
    # traffic
    _et = threading.Thread(target=exit_call)
    _et.daemon = True
    _et.start()


signal.signal(signal.SIGTERM, exit_gracefully)


@app.route("/")
def hello():
        return "Hello World!"


@app.route("/_status/liveness")
def liveness():
        return "I am alive"


@app.route("/_shutdown", methods=["POST"])
def shutdown():
    func = request.environ.get('werkzeug.server.shutdown')
    if func is None:
        return "Not a werkzeug server"
    func()
    return "shutdown"


@app.route("/_status/readiness")
def readiness():
        if not shuttingDown:
            return "I am ready"
        else:
            abort(500, 'not ready anymore')


app.run(port=5420)

但它为SEK返回SEK，为DKK返回DKK，它应该返回kr。美元，英镑，欧元工作正常。

可能是什么问题？

Answer 1

它不使用NSLocale类（Swift 3/4）：

func getSymbolForCurrencyCode(code: String) -> String? {
    let result = Locale.availableIdentifiers.map { Locale(identifier: $0) }.first { $0.currencyCode == code }
    return result?.currencySymbol
}
getSymbolForCurrencyCode(code: "GBP")

Answer 2

我为字符串创建了两个扩展，添加了缓存以优化搜索。

extension String {
    private static let currencyCode = NSCache<NSString, NSString>()

    public var symbolForCurrencyCode: String? {
        if let cached = Self.currencyCode.object(forKey: self as NSString) {
            return cached as String
        }
        let identifiers = Locale.availableIdentifiers
        guard let identifier = identifiers.first(where: { Locale(identifier: $0).currencyCode == self }) else {
            return nil
        }

        guard let symbol = Locale(identifier: identifier).currencySymbol else {
            return nil
        }

        Self.currencyCode.setObject(symbol as NSString, forKey: self as NSString)

        return symbol
    }
}

extension Optional where Wrapped == String {
    public var symbolForCurrencyCode: String? {
        guard let code = self else {
            return nil
        }
        return code.symbolForCurrencyCode
    }
}

"GBP".symbolForCurrencyCode // "£"
"EUR".symbolForCurrencyCode // "€"
"SEK".symbolForCurrencyCode // "kr"

Swift：从货币代码中获取货币符号不起作用

2 个答案: