线程 1：断点 1.1 Xcode Swift

Question

真的不知道如何解决这个问题。每当游戏启动时，它就会崩溃并给我这个输出。我查看了有关此问题的其他几篇文章，但它们没有帮助。

错误发生在“让敌人球”行我评论问题出现的地方

@objc func spawnEnem() {

        let enemyBall = SKSpriteNode(imageNamed: "enemyBall") #Thread 1: breakpoint 1.1 issue HERE


        self.addChild(enemyBall)
        enemyBall.size = CGSize(width: 25.0, height: 25.0)
        enemyBall.physicsBody = SKPhysicsBody(circleOfRadius: enemyBall.size.width/2)
        enemyBall.physicsBody?.affectedByGravity = true


        // Physics of our enemy
        enemyBall.physicsBody = SKPhysicsBody(circleOfRadius: enemyBall.size.width / 2)
        enemyBall.physicsBody?.categoryBitMask = PhysicsCatagroy.EnemyHere // setting enemyBall to our physics
        enemyBall.physicsBody?.contactTestBitMask = PhysicsCatagroy.smallBall | PhysicsCatagroy.mainBall // if our enemy ball hits the small ball or main ball run this
        enemyBall.physicsBody?.collisionBitMask = PhysicsCatagroy.smallBall | PhysicsCatagroy.mainBall // allows enemy Ball to collide with these small ball and main ball
        enemyBall.physicsBody?.isDynamic = false // we dont want enemy effected by gravity
        enemyBall.name = "Enemy"

    switch randomPosNum {

        case 0:
            enemyBall.position.x = 0

            let posY = arc4random_uniform(UInt32(frame.size.height))
            enemyBall.position.y = CGFloat(posY)
            break
        case 1:
            enemyBall.position.y = 0

            let posX = arc4random_uniform(UInt32(frame.size.width))
            enemyBall.position.x = CGFloat(posX)
            break
        case 2:
            enemyBall.position.y = frame.size.height

            let posX = arc4random_uniform(UInt32(frame.size.width))
            enemyBall.position.x = CGFloat(posX)
            break
        case 3:
            enemyBall.position.x = frame.size.width

            let posY = arc4random_uniform(UInt32(frame.size.height))
            enemyBall.position.y = CGFloat(posY)

            break
        default:


            break
        }
               enemyBall.run(SKAction.move(to: mainBall.position, duration: 3)) // moves enemy ball to the player ball



    }

Answer 1

您有一个处于活动状态的断点：

Press CMD + 8

要查看活动断点，请单击左侧出现的任何内容，然后单击删除按钮，它应该如下所示：

然后尝试再次运行它。

断点是调试代码的一种方式，它基本上是一种在特定点停止代码以查看执行的内容、执行顺序以及分配给它们的数据的变量。