相关疑难解决方法(0)

我收到此错误：

致命错误：对类“MyProject.AccordionLayer”使用未实现的初始化程序“init(layer:)”

使用以下代码。在我的视图控制器中：

override func viewDidLoad() {
    let view = self.view as! AccordionView!
    view.launchInitializationAnimations()
}

在我看来：

required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)

    for var i = 0; i < self.accordions.count; ++i {
        var layer = AccordionLayer(accordion: self.accordions[i])
        layer.accordion = self.accordions[i]
        layer.frame = CGRectMake(0, CGFloat(i) * self.getDefaultHeight(), self.frame.width, self.getDefaultHeight())
        self.layer.addSublayer(layer)
        layer.setNeedsDisplay()
        layers.append(layer)
    }
}

func launchInitializationAnimations() {
    for layer in self.layer.sublayers {
        var animation = CABasicAnimation(keyPath: "topX")
        animation.duration = 2.0
        animation.fromValue = CGFloat(0.0)
        animation.toValue = CGFloat(200.0)
        layer.addAnimation(animation, forKey: "animateTopX")
    } …