MonoBehaviour.OnMouseDrag 当鼠标拖动

function OnMouseDrag () : void

Description描述

OnMouseDrag is called when the user has clicked on a GUIElement or Collider and is still holding down the mouse.

当用户鼠标拖拽GUIElement(GUI元素)或Collider(碰撞体)时调用 OnMouseDrag 。

OnMouseDrag is called every frame while the mouse is down.

OnMouseDrag在鼠标按下的每一帧被调用。

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void OnMouseDrag() {
		renderer.material.color -= Color.white * Time.deltaTime;
	}
}

// Darken the material color while user holds down the mouse.
// 在用户按下鼠标的过程中材质颜色渐黑
function OnMouseDrag () {
	renderer.material.color -= Color.white * Time.deltaTime ;
}

This function is not called on objects that belong to Ignore Raycast layer.

OnMouseOver can be a co-routine, simply use the yield statement in the function. This event is sent to all scripts attached to the Collider or GUIElement .

这个函数不会在属于Ignore Raycast的层上调用。

它可以被作为协同程序，在函数体内使用yield语句，这个事件将发送到所有附在Collider或GUIElement的脚本上。

IMPORTANT: This function has no effect on iPhone.

注意:此函数在iPhone上无效。