[Unity优化]UI优化(一)：RaycastTarget

参考链接：

http://www.manew.com/thread-100366-1-1.html

https://www.jianshu.com/p/3082ebf8a342

https://blog.csdn.net/serenahaven/article/details/80972601

1.RaycastTarget的检测

 using UnityEngine;
 using UnityEngine.UI;

 public class DrawRaycastTarget : MonoBehaviour {

     Vector3[] worldCorners = new Vector3[];

     private void OnDrawGizmos()
     {
         foreach (MaskableGraphic maskableGraphic in FindObjectsOfType<MaskableGraphic>())
         {
             if (maskableGraphic.raycastTarget)
             {
                 RectTransform rectTransform = maskableGraphic.transform as RectTransform;
                 rectTransform.GetWorldCorners(worldCorners);
                 Gizmos.color = Color.red;
                 for (int i = ; i < ; i++)
                 {
                     Gizmos.DrawLine(worldCorners[i], worldCorners[(i + ) % ]);
                 }
             }
         }
     }
 }

效果如下：

2.批量修改RaycastTarget

 using UnityEditor;
 using UnityEngine.UI;
 using UnityEngine;

 public class RaycastTargetChecker : EditorWindow
 {
     private MaskableGraphic[] graphics;
     private bool hideUnchecked = false;
     private bool showBorders = true;
     private Color borderColor = Color.blue;
     private Vector2 scrollPosition = Vector2.zero;

     private static RaycastTargetChecker instance = null;

     [MenuItem("Tools/RaycastTarget Checker")]
     private static void Open()
     {
         instance = instance ?? EditorWindow.GetWindow<RaycastTargetChecker>("RaycastTargets");
         instance.Show();
     }

     void OnEnable()
     {
         instance = this;
     }

     void OnDisable()
     {
         instance = null;
     }

     void OnGUI()
     {
         using (EditorGUILayout.HorizontalScope horizontalScope = new EditorGUILayout.HorizontalScope())
         {
             showBorders = EditorGUILayout.Toggle("Show Gizmos", showBorders, GUILayout.Width(200.0f));
             borderColor = EditorGUILayout.ColorField(borderColor);
         }
         hideUnchecked = EditorGUILayout.Toggle("Hide Unchecked", hideUnchecked);

         GUILayout.Space(12.0f);
         Rect rect = GUILayoutUtility.GetLastRect();
         GUI.color = new Color(0.0f, 0.0f, 0.0f, 0.25f);
         GUI.DrawTexture(new Rect(0.0f, rect.yMin + 6.0f, Screen.width, 4.0f), EditorGUIUtility.whiteTexture);
         GUI.DrawTexture(new Rect(0.0f, rect.yMin + 6.0f, Screen.width, 1.0f), EditorGUIUtility.whiteTexture);
         GUI.DrawTexture(new Rect(0.0f, rect.yMin + 9.0f, Screen.width, 1.0f), EditorGUIUtility.whiteTexture);
         GUI.color = Color.white;

         graphics = GameObject.FindObjectsOfType<MaskableGraphic>();

         using (GUILayout.ScrollViewScope scrollViewScope = new GUILayout.ScrollViewScope(scrollPosition))
         {
             scrollPosition = scrollViewScope.scrollPosition;
             for (int i = ; i < graphics.Length; i++)
             {
                 MaskableGraphic graphic = graphics[i];
                 if (hideUnchecked == false || graphic.raycastTarget == true)
                 {
                     DrawElement(graphic);
                 }
             }
         }
         foreach (var item in graphics)
         {
             EditorUtility.SetDirty(item);
         }
         Repaint();
     }

     private void DrawElement(MaskableGraphic graphic)
     {
         using (EditorGUILayout.HorizontalScope horizontalScope = new EditorGUILayout.HorizontalScope())
         {
             Undo.RecordObject(graphic, "Modify RaycastTarget");
             graphic.raycastTarget = EditorGUILayout.Toggle(graphic.raycastTarget, GUILayout.Width());
             EditorGUI.BeginDisabledGroup(true);
             EditorGUILayout.ObjectField(graphic, typeof(MaskableGraphic), true);
             EditorGUI.EndDisabledGroup();
         }
     }

     [DrawGizmo(GizmoType.Selected | GizmoType.NonSelected)]
     private static void DrawGizmos(MaskableGraphic source, GizmoType gizmoType)
     {
         if (instance != null && instance.showBorders == true && source.raycastTarget == true)
         {
             Vector3[] corners = new Vector3[];
             source.rectTransform.GetWorldCorners(corners);
             Gizmos.color = instance.borderColor;
             for (int i = ; i < ; i++)
             {
                 Gizmos.DrawLine(corners[i], corners[(i + ) % ]);
             }
             if (Selection.activeGameObject == source.gameObject)
             {
                 Gizmos.DrawLine(corners[], corners[]);
                 Gizmos.DrawLine(corners[], corners[]);
             }
         }
         SceneView.RepaintAll();
     }
 }

效果如下：

3.创建UI控件时自动取消RaycastTarget

 using UnityEngine;
 using UnityEditor;
 using UnityEngine.UI;

 public class CancelRaycastTarget {

     [MenuItem("GameObject/UI/Image")]
     static void CreatImage()
     {
         if (Selection.activeTransform)
         {
             if (Selection.activeTransform.GetComponentInParent<Canvas>())
             {
                 GameObject go = new GameObject("Image", typeof(Image));
                 go.GetComponent<Image>().raycastTarget = false;
                 go.transform.SetParent(Selection.activeTransform);
             }
         }
     }

     [MenuItem("GameObject/UI/Text")]
     static void CreatText()
     {
         if (Selection.activeTransform)
         {
             if (Selection.activeTransform.GetComponentInParent<Canvas>())
             {
                 GameObject go = new GameObject("Text", typeof(Text));
                 go.GetComponent<Text>().raycastTarget = false;
                 go.transform.SetParent(Selection.activeTransform);
             }
         }
     }

     [MenuItem("GameObject/UI/Raw Image")]
     static void CreatRawImage()
     {
         if (Selection.activeTransform)
         {
             if (Selection.activeTransform.GetComponentInParent<Canvas>())
             {
                 GameObject go = new GameObject("RawImage", typeof(RawImage));
                 go.GetComponent<RawImage>().raycastTarget = false;
                 go.transform.SetParent(Selection.activeTransform);
             }
         }
     }
 }