折叠所有函数⌘⌥⇧←的快捷方式在Xcode10.1中不再有效？

Question

正如https://stackoverflow.com/a/46020397/3286489所共享的，快捷方式⌘⌥⇧←可用于折叠所有功能。然而，当我在我的Xcode10.1上尝试时，它不能工作。

⌘⌥←可以工作(折叠一个函数)。

这个默认快捷键在Xcode 10.1中被删除了吗？

Answer 1

显然，⌘⌥⇧←只适用于函数折叠。如果代码中没有函数，则什么也看不到。但⌘⌥←适用于类、枚举等。

例如，使用⌘⌥⇧←时，以下代码看不到任何效果

extension UIColor {
  open class var brightRedColor: UIColor {
    return UIColor(red: 255.0/255.0, green: 59.0/255.0, blue: 48.0/255.0, alpha: 1.0)
  }
  open class var brightGreenColor: UIColor {
    return UIColor(red: 76.0/255.0, green: 217.0/255.0, blue: 100.0/255.0, alpha: 1.0)
  }
  open class var brightBlueColor: UIColor {
    return UIColor(red: 0.0, green: 122.0/255.0, blue: 1.0, alpha: 1.0)
  }
}

但在按下⌘⌥⇧←后，确实可以看到效果(包括class func)

class BugFactory {

    // MARK: Properties

    static let bugTints: [UIColor] = [.black, .brightBlueColor, .brightRedColor, .brightGreenColor]
    static let shakeRotations = [Double.pi/16, Double.pi/8, Double.pi/8, Double.pi/24]
    static let shakeDurations = [0.3, 3.0, 0.1, 0.5]
    static let bugSize = CGSize(width: 128, height: 128)

    enum BugType: Int {
        case basic, slow, fast, smooth
    }

    var currentBugType = BugType.basic

    // MARK: Create Bug

    func createBug() -> UIImageView {
        let bug = UIImageView(frame: CGRect(x: -100, y: -100, width: 128, height: 128))
        bug.image = UIImage(named: "spider")
        bug.tintColor = BugFactory.bugTints[currentBugType.rawValue]

        // add simple "shake" key-frame animation
        // for explanation, see http://www.objc.io/issue-12/animations-explained.html
        let shakeAnimation = CABasicAnimation(keyPath: "transform.rotation")
        shakeAnimation.toValue = 0.0
        shakeAnimation.fromValue = BugFactory.shakeRotations[currentBugType.rawValue]
        shakeAnimation.duration = BugFactory.shakeDurations[currentBugType.rawValue]
        shakeAnimation.repeatCount = Float.infinity
        shakeAnimation.autoreverses = true
        shakeAnimation.isRemovedOnCompletion = false
        bug.layer.add(shakeAnimation, forKey: "shake")

        return bug
    }

    // MARK: Shared Instance

    class func sharedInstance() -> BugFactory {

        struct Singleton {
            static var sharedInstance = BugFactory()
        }

        return Singleton.sharedInstance
    }
}