UnityC#中奇怪的數字轉換/編碼

我有一個嵌入統一場景作為視圖的 iOS 專案。此問題發生在設定本地化該數字具有逗號,作為十進制分隔符而不是點的設備上.

我從本機代碼（swift）發送了一個引數字串到 unity。Unity 然后決議來自 iOS 的字串，創建一個新引數以嵌入另一個 http 請求。

這是 xcode 中的登錄：

param from iOS: 615d48538edef900126a784e***616957b6f59835001137ae7b***98.42519685039369***100.06561679790026
Request Object:
- distanceFromCeiling: 9,84251968503937E 15
- distanceFromSideWall: 1,000656167979E 16
  - Obj: : UpdateRequest
  - Obj.distanceFromCeiling: : 9,84251968503937E 15
  - Obj.distanceFromSideWall: : 1,000656167979E 16
DATA request {"distanceFromCeiling":9842519685039368.0,"distanceFromSideWall":10006561679790026.0}

我希望我發送98.42519685039369, 100.06561679790026，但由于某種原因，它變成9842519685039368.0, 10006561679790026.0了資料請求 json 字串。

如何解決這個問題？我有另一個來自不同設備的日志，使用 localize en-US，似乎這里沒有出現問題。

Unity中的代碼（搜索is_the_problem_here直接跳轉到有問題的行：

using System;
using System.Collections;
using System.Collections.Generic;
using Lean.Touch;
using Newtonsoft.Json;
using UnityEngine;
using UnityEngine.UI;
using BestHTTP;
using System.Text;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
using UnityEngine.UIElements;

public class GameManager : MonoBehaviour
{

// Other functions
// ====================================

void callApiFromIOS(string param)
{
    Debug.Log("param from iOS: "   param);

    string[] str = param.Split(new string[] { "***" }, StringSplitOptions.None);

    // is_the_problem_here
    System.Nullable <double> distanceFromCeiling = null;
    System.Nullable<double> distanceFromSideWall = null;

    if (str != null && str.Length >= 4)
    {
        string ceiling = str[2];
        if (!ceiling.Equals("null"))
        {
            // is_the_problem_here
            distanceFromCeiling = Convert.ToDouble(ceiling);
        }
       
        string sideWall = str[3];
        if (!sideWall.Equals("null"))
        {
            // is_the_problem_here
            distanceFromSideWall = Convert.ToDouble(sideWall);
        }
    }

    Debug.Log("Request Object: ");
    Debug.Log("- distanceFromCeiling: "   distanceFromCeiling);
    Debug.Log("- distanceFromSideWall: "   distanceFromSideWall);

    UpdateRequest updateRequest = new UpdateRequest(distanceFromCeiling, distanceFromSideWall);
    Debug.Log("  - Obj: : "   updateRequest);
    Debug.Log("  - Obj.distanceFromCeiling: : "   updateRequest.distanceFromCeiling);
    Debug.Log("  - Obj.distanceFromSideWall: : "   updateRequest.distanceFromSideWall);

    // is_the_problem_here
    string data = JsonConvert.SerializeObject(updateRequest);

    Debug.Log("DATA request "   data);

     // the rest of the code is set the json data as request body and send http.
}

另一個日志：

param from iOS: 615d48538edef900126a784e***616957b6f59835001137ae7b***98.42519685039369***100.06561679790026

Request Object: 
- distanceFromCeiling: 98.4251968503937
- distanceFromSideWall: 100.0656167979
  - Obj: : UpdateRequest
  - Obj.distanceFromCeiling: : 98.4251968503937
  - Obj.distanceFromSideWall: : 100.0656167979
DATA request {"distanceFromCeiling":98.425196850393689,"distanceFromSideWall":100.06561679790026}

** 更新 **

I've tried following this link but it's still not working as expect (same output as the first)

var converter = new FormattedDecimalConverter(CultureInfo.GetCultureInfo("en-US"));
string data = JsonConvert.SerializeObject(updateRequest, converter);

The converter class:

using System;
using System.Globalization;
using Newtonsoft.Json;

internal class FormattedDecimalConverter : JsonConverter
{
    private CultureInfo culture;

    public FormattedDecimalConverter(CultureInfo culture)
    {
        this.culture = culture;
    }

    public override bool CanConvert(Type objectType)
    {
        return true;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        writer.WriteValue(Convert.ToString(value, culture));
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

Sorry for being clueless. What am I doing wrong here?

** UPDATE **

so changing Convert.toDouble() to double.Parse(ceiling, CultureInfo.InvariantCulture) fix the problem. What weird issue.

uj5u.com熱心網友回復：

默認情況下，Convert.ToDouble(string)使用運行代碼的設備的語言/區域設定。

在某些文化中，該.字符不被視為十進制分隔符，而是十進制組字符。

=> 例如1.000不是一而是一千！

如果string在多個設備上處理s，您應該始終確保使用培養的多載Convert.ToDouble(string, IFormatProvider)并傳入CultureInfo.InvariantCulture基于en-us.

string ceiling = str[2];
if (!ceiling.Equals("null"))
{
    // is_the_problem_here
    distanceFromCeiling = Convert.ToDouble(ceiling, CultureInfo.InvariantCulture);
}
   
string sideWall = str[3];
if (!sideWall.Equals("null"))
{
    // is_the_problem_here
    distanceFromSideWall = Convert.ToDouble(sideWall, CultureInfo.InvariantCulture);
}

標籤：c# unity3d encoding localization json.net

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