Unity3D编辑器扩展（三）——使用GUI绘制窗口

前两篇分别讲解了创建菜单https://www.cnblogs.com/xiaoyulong/p/10115053.html和创建窗口https://www.cnblogs.com/xiaoyulong/p/10120565.html

这一篇我们讲解使用 GUI 来绘制我们的窗口，使窗口内容更丰富、美观

绘制窗口我们一般会使用下面四个类：GUI、GUILayout、EditorGUI、EditorGUILayout。

这四个类大同小异，基本上没什么差别，和我们经常使用的 UGUI 和 NGUI 相比，UGUI 和 NGUI 有图形化的操作，而这四个类是纯代码操作。

GUI、EditorGUI 和 GUILayout、EditorGUILayout 的区别是：前者是固定布局，布局需要我们写代码控制，后者是自动布局。

GUI、GUILayout 和 EditorGUI、EditorGUILayout 的区别是：前者更多的用在平常调试中，后者在编辑器中使用。前者也可以使用在编辑器中。

其他的也不多说了，全是一些 API 的使用，下面我就用 EditorGUI 和 EditorGUILayout 写个小例子，给大家看一下

代码：

 using UnityEngine;
 using UnityEditor;

 public class EditorGUILayoutTest : EditorWindow
 {
     private Vector3 startPoint;//起点
     private Vector3 endPoint;//终点
     private float distance = 0f;//起点到终点的距离

     private bool val;
     private Color color = Color.red;

     private AnimationCurve curveX = AnimationCurve.Linear(, , , );
     private AnimationCurve curveY = AnimationCurve.Linear(, , , );
     private AnimationCurve curveZ = AnimationCurve.Linear(, , , );

     private int sliderValue = ;
     private bool showClose = true;
     private bool showToggleLeft = true;
     private string textfieldtest = "textfieldtest";
     private string password = "pwd123456";

     private float minVal = -10.0f;
     private float minLimit = -20.0f;
     private float maxVal = 10.0f;
     private float maxLimit = 20.0f;

     [MenuItem("MyWindow/WindowTest")]
     private static void Init()
     {
         EditorGUILayoutTest window = (EditorGUILayoutTest)EditorWindow.GetWindow(typeof(EditorGUILayoutTest));
         window.Show();
     }

     private void OnGUI()
     {
         //Vector3类型数据的显示
         startPoint = EditorGUILayout.Vector3Field("Start Point:", startPoint);
         endPoint = EditorGUILayout.Vector3Field("End Point:", endPoint);
         //只读的标签
         EditorGUILayout.LabelField("Distance:", Vector3.Distance(startPoint, endPoint).ToString("f2"));
         //勾选框
         val = EditorGUILayout.Toggle("Can Jump", val);
         //是否开启禁用功能。false表示禁用关闭，true表示开启禁用--灰色状态
         EditorGUI.BeginDisabledGroup(val);//
         //float类型文本Text
         EditorGUILayout.FloatField("跳跃高度：", 100.0f);
         //结束禁用
         EditorGUI.EndDisabledGroup();
         EditorGUILayout.FloatField("跳跃频率：", 1.85f);
         //Bounds输入框
         EditorGUILayout.BoundsField("BoundsField", new Bounds(new Vector3(, , ), new Vector3(, , )));
         //颜色选择框
         color = EditorGUILayout.ColorField("颜色:", color);
         //按钮
         if (GUILayout.Button("Close"))
         {
             this.Close();
         }
         //带有阴影的Label
         EditorGUI.DropShadowLabel(new Rect(, , position.width, ), "带有阴影的Label");
         //动画曲线
         curveX = EditorGUI.CurveField(new Rect(, , position.width - , ), "Animation on X", curveX);
         curveY = EditorGUI.CurveField(new Rect(, , position.width - , ), "Animation on Y", curveY);
         curveZ = EditorGUI.CurveField(new Rect(, , position.width - , ), "Animation on Z", curveZ);
         //数字输入
         EditorGUI.DelayedDoubleField(new Rect(, , position.width - , ), "DelayedDoubleField1", 25.0);
         EditorGUI.DelayedFloatField(new Rect(, , position.width - , ), "DelayedFloatField", 25.0f);
         EditorGUI.DelayedIntField(new Rect(, , position.width - , ), "DelayedIntField", );
         EditorGUI.DelayedTextField(new Rect(, , position.width - , ), "DelayedTextField");
         //绘画矩形
         EditorGUI.DrawRect(new Rect(, , position.width - , ), Color.green);
         //滑动条。输入框(值不能滑动): 注意左边必须要有值接收这个值，否则不能滑动
         sliderValue = EditorGUI.IntSlider(new Rect(, , position.width - , ), sliderValue, , );
         //帮助盒子信息框
         EditorGUI.HelpBox(new Rect(, , position.width - , ), "HelpBox帮助盒子", MessageType.Info);
         //Toggle 开关
         showClose = EditorGUI.Toggle(new Rect(, , position.width - , ), "Toggle", showClose);
         showToggleLeft = EditorGUI.ToggleLeft(new Rect(, , position.width - , ), "ToggleLeft", showToggleLeft);
         textfieldtest = EditorGUI.TextField(new Rect(, , position.width - , ), "TextField", textfieldtest);
         password = EditorGUI.PasswordField(new Rect(, , position.width - , ), "密码框:", password);
         //最大值和最小值滑块
         EditorGUI.MinMaxSlider(new Rect(, , position.width - , ), ref minVal, ref maxVal, minLimit, maxLimit);
     }

     private void OnInspectorUpdate()
     {
         this.Repaint();
     }
 }

效果图：