unity3d - 防止 Unity Editor 应用程序进入播放模式

Question

是否可以防止 Unity 在用户按下按钮后更改播放模式？

假设我有一个自定义编辑器，它的状态可能无法正确序列化；如果此时用户更改 Unity Editor 模式，他们的更改将会丢失。

完全摆脱不可序列化状态是一种选择，但这是完全不同复杂度的任务。想避免这种情况。

更新:

我测试了derHugo's answer使用以下脚本:

using UnityEditor;
using UnityEngine;

namespace Innoactive.Hub.Training.Editors
{
    [InitializeOnLoad]
    public class ProveThatDudeWrongWindow : EditorWindow
    {
        private static ProveThatDudeWrongWindow windowInstance;

        private string notSerializedString = "default";

        static ProveThatDudeWrongWindow()
        {
            EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
        }

        [MenuItem("Test/I'm damn sure he's wrong")]
        private static void MenuItem()
        {
            if (windowInstance == null)
            {
                windowInstance = GetWindow<ProveThatDudeWrongWindow>();
            }

            windowInstance.notSerializedString = "some value";
        }

        [MenuItem("Test/Display current value")]
        private static void DisplayCurrentNonSerializedValue()
        {
            windowInstance = GetWindow<ProveThatDudeWrongWindow>();
            Debug.Log("string: " + windowInstance.notSerializedString);
        }

        private static void OnPlayModeStateChanged(PlayModeStateChange state)
        {
            if (state == PlayModeStateChange.ExitingEditMode)
            {
                EditorApplication.isPlaying = false;
            }

            Debug.Log("state: " + state);
        }
    }
}

然后我做了以下事情:

1. 按 Test/I'm damn sure he's wrong 选项将非序列化值从 default 值设置为 some value
2. 按测试/显示当前值以确保值已更改
3. 按播放键
4. 按测试/显示当前值查看当前值。如果它是default，derHugo 的解决方案不起作用，如果它是some value，它就起作用。

结果:derHugo 很酷。

Answer 1

是的，我想

您可以注册到EditorApplication.playModeStateChanged

看我修改过的文档中的例子:

using UnityEngine;
using UnityEditor;

public static class PlayModeStateChangedExample
{   
    private static void LogPlayModeState(PlayModeStateChange state)
    {
        Debug.Log(state);
    }

    public static void SetPlayModeEnabled(bool enabled)
    {
        //This is possible since you allways can remove
        //a listener even if there is none so far
        //This allways removes the listener making sure it is only added once  
          EditorApplication.playModeStateChanged -= LogPlayModeState;

        if(!enabled)
        {
            EditorApplication.playModeStateChanged += LogPlayModeState;
        }
    }
}

现在剩下的就是重置EditorApplication.isPlaying回到 false 例如通过替换

Debug.Log(state);

与

// This mode occures right before entering PlayMode
// and is the moment in which we want to intervene
if(state == PlayModeStateChange.ExitingEditMode)
{
    EditorApplication.isPlaying = false;
}

终止 PlayMode。

这样你就可以从任何地方打电话，例如

PlayModeStateChangedExample.SetPlayModeEnabled(false);

---

但是我不确定这是否会完全阻止序列化部分，因为它也在文档中说明

Setting isPlaying delays the result until after all script code has completed for this frame.