来自外部 XIB 的 DidSet 崩溃

Question

我有一个外部 XIB，即 @IBDesignable。在显示此 XIB 的视图中，我有此插座。

  @IBOutlet weak var digitizingButton: DigitizingButton! {
    didSet {
      digitizingButton.buttonIsBeingTouched = {[weak self] in
        // bla bla
      }
    }
  }

崩溃于

digitizingButton.buttonIsBeingTouched = {[weak self] in

EXC_BAD_ACCESS (code 2)

DigitizingButton 加载如下：

 required init?(coder decoder: NSCoder) {
    super.init(coder: decoder)
    self.loadViewFromNib()
  }

  override init(frame: CGRect) {
    super.init(frame: frame)
    self.loadViewFromNib()
  }


  /** Loads instance from nib with the same name. */
  func loadViewFromNib() {
    let bundle = Bundle(for: type(of: self))
    let nib = UINib(nibName: .init(String(describing: type(of: self))), bundle: bundle)

    let myView = nib.instantiate(withOwner: self, options: nil)[0] as! UIView

    self.view = myView
    self.addSubview(myView)
  }

知道发生了什么事吗？提前致谢。

Answer 1

尝试改变你的初始化方法。

将 xib 文件的第一个视图中的 IBOutlet 添加到 swift 文件：

@IBOutlet var containerView: UIView!

然后按如下方式编辑您的 loadViewFromBib 方法：

  func loadViewFromNib() {
    Bundle.main.loadNibNamed("DigitizingButton", owner: self, options: nil)
    addSubview(containerView)
    containerView.frame = self.bounds
    containerView.autoresizingMask = [.flexibleHeight, .flexibleWidth]

    // Other initialization here
  }

来自外部 XIB 的 DidSet 崩溃

Crash on DidSet from external XIB

swift

ibdesignable

swift5