OnGUI 用于渲染和处理 GUI 事件。
OnGUI 是唯一可以实现 "即时模式" GUI (IMGUI) 系统以渲染和处理 GUI 事件的函数。您的 OnGUI 实现可能会在每一帧中被调用多次（每个事件调用一次）。有关 GUI 事件的更多信息，请参阅 Event 参考。如果 MonoBehaviour 的 enabled 属性设置为 false，则不会调用 OnGUI()。
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { void OnGUI() { if (GUI.Button(new Rect(10, 10, 150, 100), "I am a button")) { print("You clicked the button!"); } } }
有关更多信息，请参阅 GUI 脚本指南。
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