在unity3d里，简易又快速的让物体进入Screen

//放置一个Object在屏幕的右下角:

transform.ScreenPlacement(ScreenPosition.LowerRight);

//放置一个Object到屏幕的右下角,且距离屏幕右侧60像素,距离底部20像素:
transform.ScreenPlacement(ScreenPosition.LowerRight, new Vector2(60,20));