Unity - UGUI - 限制弹出的UI始终保持在屏幕内

目的点击某个物品时在物品位置弹出信息UI使UI不会超过屏幕外侧始终保持在屏幕内/// summary /// 传入ui设置位置的节点rect /// 要求这个节点的rect的height和width决定整个ui的宽高 /// 并且锚点在正中心 /// /summary /// param nametargetUIRootRect/param /// param namefollowTargetUIPos目标世界坐标对应的UI坐标/param void FormatLimitUIInScreen(RectTransform targetUIRootRect, Vector3 followTargetUIPos) { //先将ui的位置设置到目标位置 targetUIRootRect.transform.position followTargetUIPos; //再修正ui位置到屏幕内 var rectPos targetUIRootRect.anchoredPosition; if (Mathf.Abs(rectPos.y) targetUIRootRect.rect.height / 2 Screen.height / 2) { if (rectPos.y 0) { rectPos.y Screen.height / 2 - targetUIRootRect.rect.height / 2; } else { rectPos.y -Screen.height / 2 targetUIRootRect.rect.height / 2; } } if (Mathf.Abs(rectPos.x) targetUIRootRect.rect.width / 2 Screen.width / 2) { if (rectPos.x 0) { rectPos.x Screen.width / 2 - targetUIRootRect.rect.width / 2; } else { rectPos.x -Screen.width / 2 targetUIRootRect.rect.width / 2; } } targetUIRootRect.anchoredPosition rectPos; }