如何通过iphone触屏选中Unity3D场景中的GameObject对象代码？ 1.去camera的api里面看，有将2D的touch点产生一条从屏幕出发的ray，再用这个进行3D的碰撞，进而选取obj。 2.最简单的方法是对物体先赋予Collider，任意一种碰撞器皆可。然后赋予一个脚本，脚本里写OnMouseDown就行，直接支持触摸。 
代码如下： - <p style="border: 0px; border-image-source: initial; border-image-slice: initial; border-image-width: initial; border-image-outset: initial; border-image-repeat: initial;"><font color="#616161" face="微软雅黑"><span style="font-size: 14px; line-height: 30px;">Ray ray = mCamera.ScreenPointToRay (new Vector3 (touch.position.x, touch.position.y,0));</span></font></p><p style="border: 0px; border-image-source: initial; border-image-slice: initial; border-image-width: initial; border-image-outset: initial; border-image-repeat: initial;"><font color="#616161" face="微软雅黑"><span style="font-size: 14px; line-height: 30px;">RaycastHit[] hits;</span></font></p><p style="border: 0px; border-image-source: initial; border-image-slice: initial; border-image-width: initial; border-image-outset: initial; border-image-repeat: initial;"><span style="font-size: 14px; line-height: 30px;"><font color="#616161" face="微软雅黑"></font></span></p><p style="border: 0px; border-image-source: initial; border-image-slice: initial; border-image-width: initial; border-image-outset: initial; border-image-repeat: initial;"><font color="#616161" face="微软雅黑"><font color="#616161" face="微软雅黑"><span style="font-size: 14px; line-height: 30px;">hits = Physics.RaycastAll (ray, 50);</span></font></font></p>
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