用途：一个GUI对象在屏幕中飞行，用GameObject.SendMessage告诉GUI对象何时飞行。

使用：把该脚本拖到一个GameObject上，用另一个脚本GameObject.SendMessage发送飞行消息。

unity3d学习GUIFly脚本代码 ：

[javascript] view plaincopy 　　//Attach this to the same as the GUIFly is attached to. 　　// Fly in 　　gameObject.SendMessage(“Fly”, true); 　　// Wait 5 seconds 　　yield new WaitForSeconds(5); 　　// Fly out 　　gameObject.SendMessage(“Fly”, false); 　　[c-sharp] view plaincopy 　　using UnityEngine; 　　using System.Collections; 　　public class GUIFly : MonoBehaviour 　　{ 　　public enum InterpolationType 　　{ 　　Linear, 　　Sinusoidal, 　　Hermite 　　} 　　public Vector3 m_InPosition; 　　public Vector3 m_OutPosition; 　　public float m_TravelTime = 0.5f; 　　public float m_DelayToStartTravelingAfterMessageReceived = 0.1f; 　　public bool m_StartWithInPosition = false; 　　public InterpolationType m_InterpolationType = InterpolationType.Sinusoidal; 　　void Start () 　　{ 　　transform.position = (m_StartWithInPosition) ? m_InPosition : m_OutPosition; 　　} 　　IEnumerator Fly(bool flyIn) 　　{ 　　yield return new WaitForSeconds(m_DelayToStartTravelingAfterMessageReceived); 　　Vector3 targetPosition = (flyIn) ? m_InPosition : m_OutPosition; 　　float startTime = Time.time; 　　Vector3 startPosition = transform.position; 　　while (Time.time < startTime + m_TravelTime) 　　{ 　　switch (m_InterpolationType) 　　{ 　　case InterpolationType.Linear: 　　transform.position = Vector3.Lerp(startPosition, targetPosition, (Time.time - startTime) / m_TravelTime); 　　break; 　　case InterpolationType.Sinusoidal: 　　transform.position = Sinerp(startPosition, targetPosition, (Time.time - startTime) / m_TravelTime); 　　break; 　　case InterpolationType.Hermite: 　　transform.position = Hermite(startPosition, targetPosition, (Time.time - startTime) / m_TravelTime); 　　break; 　　} 　　yield return 0; 　　} 　　transform.position = targetPosition; 　　} 　　void Reset() 　　{ 　　m_InPosition = transform.position; 　　} 　　private static Vector3 Sinerp(Vector3 start, Vector3 end, float value) 　　{ 　　return new Vector3(Sinerp(start.x, end.x, value), Sinerp(start.y, end.y, value), Sinerp(start.z, end.z, value)); 　　} 　　private static Vector3 Hermite(Vector3 start, Vector3 end, float value) 　　{ 　　return new Vector3(Hermite(start.x, end.x, value), Hermite(start.y, end.y, value), Hermite(start.z, end.z, value)); 　　} 　　/* The following functions are also in the Mathfx script on the UnifyWiki, but are included here so the script is self sufficient. */ 　　private static float Sinerp(float start, float end, float value) 　　{ 　　return Mathf.Lerp(start, end, Mathf.Sin(value * Mathf.PI * 0.5f)); 　　} 　　private static float Hermite(float start, float end, float value) 　　{ 　　return Mathf.Lerp(start, end, value * value * (3.0f - 2.0f * value)); 　　} 　　}