停止Unity在运行时脚本修改重新编译的情况

nity3D有一个叫做”live recompile”的功能，即在编辑器处于播放状态时修改脚本代码或替换托管dll等操作时，当场触发重新编译生成项目脚本assembly，并会进行重新加载操作，然而，这个功能很多时候并不能保证重加载后的代码逻辑依然能正常运行，轻则报错，重则卡死。经过博主测试发现，Unity在重加载assembly后，会清空类实例部分成员变量的值（如在Awake中new出的数组对象等），且不负责还原。

使用以下脚本可以让Unity在代码修改时不重新编译，而是显示一个锁，在停止运行时才重新编译

// Copyright Cape Guy Ltd. 2018. http://capeguy.co.uk.
// Provided under the terms of the MIT license -
// http://opensource.org/licenses/MIT. Cape Guy accepts
// no responsibility for any damages, financial or otherwise,
// incurred as a result of using this code.

using UnityEditor;
using UnityEngine;

/// <summary>
/// Prevents script compilation and reload while in play mode.
/// The editor will show a the spinning reload icon if there are unapplied changes but will not actually
/// apply them until playmode is exited.
/// Note: Script compile errors will not be shown while in play mode.
/// Derived from the instructions here:
/// https://support.unity3d.com/hc/en-us/articles/210452343-How-to-stop-automatic-assembly-compilation-from-script
/// </summary>
[InitializeOnLoad]
public class DisableScripReloadInPlayMode
{
    static DisableScripReloadInPlayMode()
    {
        EditorApplication.playModeStateChanged
            += OnPlayModeStateChanged;
    }

    static void OnPlayModeStateChanged(PlayModeStateChange stateChange)
    {
        switch (stateChange) {
            case (PlayModeStateChange.EnteredPlayMode): {
                EditorApplication.LockReloadAssemblies();
                Debug.Log ("Assembly Reload locked as entering play mode");
                break;
            }
            case (PlayModeStateChange.ExitingPlayMode): {
                Debug.Log ("Assembly Reload unlocked as exiting play mode");
                EditorApplication.UnlockReloadAssemblies();
                break;
            }
        }
    }

}

相关参考：https://answers.unity.com/questions/286571/can-i-disable-live-recompile.html

Unity2018已经可以自行设置

最完美的方案：https://capeguy.dev/2018/06/disabling-assembly-reload-while-in-play-mode/