下面分享一下unity3d 进度条 scrollbar的代码，供大家参考学习。

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class BloodBarTest : MonoBehaviour {
5.  
6.  public GUISkin theSkin;
7.  public float bloodValue = 0.0f;
8.  private float tmpValue;
9.  private Rect rctBloodBar;
10.  private Rect rctUpButton;
11.  private Rect rctDownButton;
12.  private bool onoff;
13.  
14.  // Use this for initialization
15.  void Start () {
16.   rctBloodBar = new Rect (20,20,20,200);
17.   rctUpButton = new Rect (50,20,40,20);
18.   rctDownButton = new Rect (50,50,40,20);
19.   tmpValue = bloodValue;
20.  }
21.  
22.  void OnGUI (){
23.   GUI.skin = theSkin;
24.   if (GUI.Button (rctUpButton,"加血")){
25.    tmpValue = -1.0f;
26.   }
27.   if (GUI.Button (rctDownButton,"减血")){
28.    tmpValue += 0.1f;
29.   }
30.   if (bloodValue > 0.0f) tmpValue = 0.0f;
31.   if (bloodValue < -1.0f) tmpValue = -1.0f;
32.   bloodValue = Mathf.Lerp(bloodValue,tmpValue,0.05f);
33.   //~ Debug.Log (bloodValue + " " + tmpValue);
34.   GUI.VerticalScrollbar(rctBloodBar, 1.0f, bloodValue,0.0f, 1.0f,GUI.skin.GetStyle("verticalScrollbar"));
35.  }
36.  
37.  // Update is called once per frame
38.  void Update () {
39.  
40.  }
41. }