小编Had*_*adi的帖子

我正在使用Xcode 7 beta 2并关注raywenderlich.com的Breakout教程来学习SpriteKit.这是我尝试使用unarchiveFromFile加载GameScene时出现的错误.

GameScene.type没有名为unarchiveFromFile的成员.

这是代码:

func didBeginContact(contact: SKPhysicsContact) {
    // 1. Create local variables for two physics bodies
    var firstBody: SKPhysicsBody
    var secondBody: SKPhysicsBody

    // 2. Assign the two physics bodies so that the one with the lower category is always stored in firstBody
    if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask {
        firstBody = contact.bodyA
        secondBody = contact.bodyB
    } else {
        firstBody = contact.bodyB
        secondBody = contact.bodyA
    }

    // 3. react to the contact between ball and bottom
    if firstBody.categoryBitMask == BallCategory …