GHZSDKXR/Editor/Scripts/Utility/DefineSymbolsUtility.cs

using UnityEditor;
using System.Collections.Generic;
using System.Linq;

namespace NRKernal.Release
{
    static class DefineSymbolsUtility
    {
        public static bool HasSymbol(string symbol)
        {
            string definesString = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
            return (!string.IsNullOrEmpty(definesString) && definesString.Contains(symbol));
        }

        public static void RemoveSymbol(string symbol)
        {
            string definesString = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
            List<string> allDefines = definesString.Split(';').ToList();
            allDefines.Remove(symbol);
            PlayerSettings.SetScriptingDefineSymbolsForGroup(
                EditorUserBuildSettings.selectedBuildTargetGroup,
                string.Join(";", allDefines.ToArray()));
        }

        public static void AddSymbol(string symbol)
        {
            string definesString = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
            List<string> allDefines = definesString.Split(';').ToList();
            List<string> Symbols = new List<string>() { symbol };
            allDefines.AddRange(Symbols.Except(allDefines));
            PlayerSettings.SetScriptingDefineSymbolsForGroup(
                EditorUserBuildSettings.selectedBuildTargetGroup,
                string.Join(";", allDefines.ToArray()));
        }
    }
}