Unity Editor编辑器开发相关知识点

EditorPrefs

Unity编辑器为开发者提供了类似PlayerPrefs的数据保存方式EditorPrefs。EditorPrefs是适用于编辑器模式，而PlayerPrefs适用于游戏运行时。

示例代码

            bool currentValue = EditorPrefs.GetBool(key, false);
            bool newValue = GUILayout.Toggle(currentValue, label);
            EditorPrefs.SetBool(key, newValue);

编辑器模式下获取鼠标坐标与点击

使用Event.current.mousePosition获取鼠标坐标。

通过Event.current.type获取点击类型。

示例代码

                    if(Event.current.type == EventType.MouseDown || Event.current.type == EventType.MouseDrag)
                        DoSomething();

输入类型有如下几种。

    //
    // 摘要:
    //     Types of UnityGUI input and processing events.
    public enum EventType
    {
        MouseDown = 0,
        mouseDown = 0,
        MouseUp = 1,
        mouseUp = 1,
        MouseMove = 2,
        mouseMove = 2,
        MouseDrag = 3,
        mouseDrag = 3,
        KeyDown = 4,
        keyDown = 4,
        KeyUp = 5,
        keyUp = 5,
        ScrollWheel = 6,
        scrollWheel = 6,
        Repaint = 7,
        repaint = 7,
        Layout = 8,
        layout = 8,
        DragUpdated = 9,
        dragUpdated = 9,
        DragPerform = 10,
        dragPerform = 10,
        Ignore = 11,
        ignore = 11,
        Used = 12,
        used = 12,
        ValidateCommand = 13,
        ExecuteCommand = 14,
        DragExited = 15,
        ContextClick = 16,
        MouseEnterWindow = 20,
        MouseLeaveWindow = 21
    }

编辑器模式下鼠标坐标转换屏幕坐标

编辑器模式下坐标系是左上角为原点，而且实际的屏幕坐标是Event.current.mousePosition坐标的两倍，如果使用编辑器模式下的鼠标坐标需要转换坐标。

            Camera camera = SceneView.currentDrawingSceneView.camera; //获取到编辑器模式下的相机，这个相机是看不到的，但是可以拿到
            Vector3 mousePosition = Event.current.mousePosition * 2; //需要乘以两倍
            mousePosition = new Vector3(mousePosition.x, camera.pixelHeight - mousePosition.y); //实际屏幕坐标

其他

在scene场景中不会点击选中物体。

            HandleUtility.AddDefaultControl (GUIUtility.GetControlID (FocusType.Passive));

使用HideFlags隐藏或者不可编辑目标。

			obj.hideFlags = HideFlags.HideInHierarchy; //在Hierarchy中不显示目标
			_myTarget.transform.hideFlags = HideFlags.NotEditable; //不允许在Inspector中编辑transform

OnSceneGUI使编辑器在场景视图中处理事件。

        private void OnSceneGUI()
        {
            List<Mode> modes = EditorUtils.GetListFromEnum<Mode>();
            List<string> modeLabels = new List<string>();
            foreach (Mode mode in modes)
            {
                modeLabels.Add(mode.ToString());
            }
            
            Handles.BeginGUI();
            
            GUILayout.BeginArea(new Rect(10f,10f,360f , 40));

            _selectedMode = (Mode)GUILayout.Toolbar((int) _currentMode, modeLabels.ToArray(), GUILayout.ExpandHeight(true));
            
            GUILayout.EndArea();
            
            Handles.EndGUI();
        }

效果图

SceneView.currentDrawingSceneView.in2DMode = true;切换为2D视图。

GUI.FocusControl("");取消Editor界面焦点。

Editor.CreateEditor(temp).DrawDefaultInspector();在当前Inspector界面显示目标脚本的Inspector。