我有一个名为bombtower的局部变量。代码如下:ifcheckMark.contains(touchLocation){letbombTowerLevel1=SKSpriteNode(imageNamed:"bombtowertrial2")bombTowerLevel1.name="bombtower"//changelatermaybebombTowerLevel1.position=bombTowerGhost.positionbombTowerLevel1.zPosition=1//changelaterforhealthbombTowerLevel1.setScale(f