用鼠标在屏幕上拖动多张图片

会飞的鱼

以前看过一段代码，说的是用鼠标在屏幕上拖动图片，但这段代码的扩展性不是很好，拖动任何位置，图片都会移动，且只能拖动一张图片。代码如下：

var Tu : Texture2D;

private var first = Vector2.zero;

private var second = Vector2.zero;

private var tempx : float = 0;

private var tempy : float = 0;

function OnGUI () {

 GUI.DrawTexture (Rect (tempx, tempy, 50, 50),Tu);

 if(Event.current.type == EventType.MouseDown){

 first = Event.current.mousePosition ;

 }

 if(Event.current.type == EventType.MouseDrag){

 second = Event.current.mousePosition ;

 tempx += (second.x-first.x);

 tempy += (second.y-first.y);

 first = second;

 }

}

下面贴一段我修改后的代码，这段代码可以实现鼠标必须点击在图片上才能拖动图片，且可以拖动多张图片。拖动某一张图片时，其他图片不会收影响。利用这个思想，你可以实现其他的很多功能，不仅仅是拖动图片，例如可以实现判断图片是否拖入某一正确区域等等(拼图游戏可以用上述方法实现)。

var Tu : Texture2D;

var Tu1 : Texture2D;

private var first = Vector2.zero;

private var second = Vector2.zero;

private var tempx : float = 0;

private var temp1x : float = 500;

private var tempy : float = 0;

private var temp1y : float = 0;

var IsTu : int = 0;

var IsTu1 : int = 0;

function Update () {

}

function OnGUI () {

 GUI.DrawTexture (Rect (tempx, tempy, 50, 50),Tu);

 GUI.DrawTexture (Rect (temp1x, temp1y, 50, 50),Tu1);

 if(Event.current.type == EventType.MouseDown){

 first = Event.current.mousePosition ;

 }

 if(first.x > tempx && first.x < (tempx+50) && first.y > tempy && first.y < (tempy+50) ){

 IsTu = 1;

 }

 if(first.x > temp1x && first.x < (temp1x+50) && first.y > temp1y && first.y < (temp1y+50) ){

 IsTu1 = 1;

 }

 if(Event.current.type == EventType.MouseDrag && IsTu == 1){

 second = Event.current.mousePosition ;

 tempx += (second.x-first.x);

 tempy += (second.y-first.y);

 first = second;

 IsTu = 0;

 }

 if(Event.current.type == EventType.MouseDrag && IsTu1 == 1){

 second = Event.current.mousePosition ;

 temp1x += (second.x-first.x);

 temp1y += (second.y-first.y);

 first = second;

 IsTu1 = 0;

 }

}



lyj19810816 发表



来自unity3d中文学习社区