Unity3D内置有GUI，
首先，使用GUI实现一个按钮，并且点击实现触发，
void OnGUI()
{
//GUI.Button (new Rect (10,10,50,50), "nihaoa ");
if(GUI.Button(new Rect (50, 50, 50, 50),"Button")) {
Debug.Log("wo shi yi ge an niu"); } }
这里屏幕上会创建一个按钮，点击按钮，会出现下面那句话：
文本输入框的使用：
注意这里的赋值要赋值给自己，不然每一帧显示，会把前面的值刷掉的
using UnityEngine;
using System.Collections; public class getbutton : MonoBehaviour { // Use this for initialization public Rect rec;
public string text;
void Start () {
text = "请输入";
} // Update is called once per frame
void Update () { } void OnGUI()
{ text = GUI.TextField(new Rect(0, 0, 100, 100), text); } }
复选框：
using UnityEngine;
using System.Collections; public class getbutton : MonoBehaviour { // Use this for initialization public bool toogbaleT = true;
public bool toogbaleM = false;
void Start () { } // Update is called once per frame
void Update () { } void OnGUI()
{ toogbaleT = GUI.Toggle(new Rect(0, 0, 50, 50), toogbaleT, "体育");
toogbaleM = GUI.Toggle(new Rect(55, 55, 50, 50), toogbaleM, "美术"); } }
可以实现，选择和取消的效果，每一次进行点击，都会刷新toogbaleT值来决定显示的效果:
进度条的实现：
using UnityEngine;
using System.Collections; public class getbutton : MonoBehaviour { // Use this for initialization public float hsliaervalue = 0f; void Start () { } // Update is called once per frame
void Update () { } void OnGUI()
{ hsliaervalue = GUI.HorizontalSlider(new Rect(140, 210, 100, 30), hsliaervalue, 0, 10); } }
效果图：
