Question

这个问题与这个已回答的问题有关

fatal error: NSArray element failed to match the Swift Array Element type

但还有一个问题。

我正在尝试解析一些JSON输入并拥有以下两个类

class EndDiskMeridian:NSObject {
    var dispUcoefficients:Array<Double>
    var dispVcoefficients:Array<Double>
    var dispWcoefficients:Array<Double>

    init(dict: NSDictionary) {
        dispUcoefficients = dict["DispUcoefficients"] as Array<Double>
        dispVcoefficients = dict["DispVcoefficients"] as Array<Double>
        dispWcoefficients = dict["DispWcoefficients"] as Array<Double>
    }
}

class EndDisk:NSObject {
    var numberOfDivisions:Int!
    var meridians:Array<EndDiskMeridian>!

    init(dict:NSDictionary) {
        numberOfDivisions = dict["numberOfDivisions"] as Int
        meridians = dict["meridians"] as Array<EndDiskMeridian>
    }
}

问题是，当我从dict添加EndDiskMeridians时，它永远不会到达EndDiskMeridian类中的init函数。

当我去访问dispUcoefficients时，我在运行时得到“致命错误nsarray元素无法匹配swift数组元素类型”错误。

当它们包含一系列双打时，我应该如何设置经络？

Answer 1

EndDiskMeridian无法存储在字典中，因此您必须自己构建一个并将字典传递给它。

以下代码适用于游乐场：

import Foundation

class EndDiskMeridian:NSObject {
    var dispUcoefficients:Array<Double>
    var dispVcoefficients:Array<Double>
    var dispWcoefficients:Array<Double>

    init(dict: NSDictionary) {
        dispUcoefficients = dict["DispUcoefficients"] as Array<Double>
        dispVcoefficients = dict["DispVcoefficients"] as Array<Double>
        dispWcoefficients = dict["DispWcoefficients"] as Array<Double>
    }
}

class EndDisk:NSObject {
    var numberOfDivisions:Int!
    var meridians:Array<EndDiskMeridian> = []

    init(dict:NSDictionary) {
        numberOfDivisions = dict["numberOfDivisions"] as Int
        let meridians = dict["meridians"] as NSArray
        for subdict in meridians {
            let endDiskMeridian = EndDiskMeridian(dict: subdict as NSDictionary)
            self.meridians.append(endDiskMeridian)
        }
    }
}

let dict = ["EndDisk" : ["numberOfDivisions": 2, "meridians": [["DispUcoefficients": [1.0, 2.0], "DispVcoefficients": [3.0, 4.0], "DispWcoefficients": [5.0, 6.0]]]]]

let endDisk = EndDisk(dict: dict["EndDisk"]!)

致命错误nsarray元素无法匹配swift数组元素类型

1 个答案: