尝试初始化子类

Question

我有一个类ECGView，有一个子类，InjuryView。当我运行代码时，控制台显示“lldb”，并在InjuryView子类的init方法中抛出以下错误：线程1：EXC_BAD_INSTRUCTION（代码= EXC_I386_INVOP，子代码= 0x0）。

我对编程比较陌生，而且我无法弄清楚为什么会抛出这个错误。任何帮助将不胜感激，谢谢！

class ECGView {
    var title: String
    var normalImage: UIImage
    var markedImageByComponents: [MarkedAnatomyComponent]
    var steps: [UIImage]
    var stepDescriptions: [String]
    var sectionNames: [[String]]
    var attribution: String
    var injuryList: [[InjuryView]]
    var numberOfPages: Int = 0
    var anatomyOverlay: Bool = false
    var currentStep: Int = 0
    var section: Bool = true

    init(title: String, normalImage: UIImage, markedImageByComponents: [MarkedAnatomyComponent] = [], steps: [UIImage] = [], stepDescriptions: [String] = [], sectionNames: [[String]] = [], attribution: String, injuryList: [[InjuryView]] = []){
        self.title = title
        self.normalImage = normalImage
        self.markedImageByComponents = markedImageByComponents
        self.steps = steps
        self.stepDescriptions = stepDescriptions
        self.sectionNames = sectionNames
        self.attribution = attribution
        self.injuryList = injuryList
    }
}

class InjuryView: ECGView{
    var injuryImage: UIImage
    var injuryComponents: [MarkedAnatomyComponent]
    var injuryTitle: String
    var shortInjuryTitle: String
    var injuryAttribution: String
    var overviewText: String
    var findingsText: String
    var managementText: String
    var otherTitle: String
    var otherText: String
    var normalToggle: Bool = false
}

此处抛出错误＆gt;

init(injuryImage: UIImage = #imageLiteral(resourceName: "Placeholder.jpg"), injuryComponents: [MarkedAnatomyComponent], injuryTitle: String = "", shortInjuryTitle: String = "", injuryAttribution: String, overviewText: String, findingsText: String, managementText: String, otherTitle: String = "", otherText: String = ""){
    self.injuryImage = injuryImage
    self.injuryComponents = injuryComponents
    self.injuryTitle = injuryTitle
    self.shortInjuryTitle = shortInjuryTitle
    self.injuryAttribution = injuryAttribution
    self.overviewText = overviewText
    self.findingsText = findingsText
    self.managementText = managementText
    self.otherTitle = otherTitle
    self.otherText = otherText
    super.init(title: "", normalImage: #imageLiteral(resourceName: "Blank.png"), attribution: "")
    self.title = title
    section = false
}

如果有更多帮助，请点击此处截图：

Answer 1

更改此init行：

init(title: String, normalImage: UIImage, markedImageByComponents: [MarkedAnatomyComponent] = [], steps: [UIImage] = [], stepDescriptions: [String] = [], sectionNames: [[String]] = [], attribution: String, injuryList: [[InjuryView]] = []){

为：

init(title: String, normalImage: UIImage, markedImageByComponents: [MarkedAnatomyComponent] = [], steps: [UIImage] = [], stepDescriptions: [String] = [], sectionNames: [[String]] = [[]], attribution: String, injuryList: [[InjuryView]] = [[]]){

因为您有这种类型的数组，所以需要使用[[]]而不是[]清除它。