从Xcode 6 Beta 6升级到Xcode 6.0.1后编译错误

Question

I have a problem since I upgraded from Xcode 6 Beta 6 to Xcode 6.0.1.

With Xcode 6.0.1, I have 62 errors but none with the beta.

Example:

    balloonro.physicsBody = SKPhysicsBody (circleOfRadius: balloonro.size.width/2)
    balloonro.physicsBody.dynamic = true
    balloonro.physicsBody.categoryBitMask = balloonCategory | pinkCategory
    balloonro.physicsBody.contactTestBitMask = flechetteCategory
    balloonro.physicsBody.collisionBitMask = balloonCategory
    balloonro.physicsBody.mass = 1
    balloonro.physicsBody.restitution = 1
    balloonro.physicsBody.allowsRotation = true

On all lines, Xcode 6.0.1 said:

'SKPhysicsBody?' does not have a member named 'restitution/mass/dynamic/etc.'

What can I do to fix this?

Answer 1

SKPhysicsBody? is optional value. You have to unwrap it or use optional chaining. For exmaple,

balloonro.physicsBody?.dynamic = true