故事板初始化和deinit

Question

通过故事板（NS或UI）初始化ViewController时，您是否需要保留对故事板的引用，或者在完成故事板后可以忽略它并将其删除？

class ViewController: NSViewController {

    var secondarySB: NSStoryboard? = nil

    @IBAction
    func loadAndKeep(_ sender: NSButton) {
        //keeping a reference
        secondarySB = NSStoryboard.init(name: NSStoryboard.Name.init(rawValue: "Secondary"), bundle: nil)
        let vc = secondarySB?.instantiateInitialController() as! Secondary
        self.view.addSubview(vc.view)
    }
    @IBAction
    func load(_ sender: NSButton) {
        //ignoring the storyboard after I get the viewcontroller
        let sb = NSStoryboard.init(name: NSStoryboard.Name.init(rawValue: "Secondary"), bundle: nil)
        let vc = sb.instantiateInitialController() as! Secondary
        self.view.addSubview(vc.view)
    }
}

Answer 1

您不需要保留对故事板的引用，但您确实需要将实例化的视图控制器添加为子视图控制器。