swift - '(键 : String, 值:任何 )' is not convertible to ' [字符串:任何]'

Question

我正在尝试重构这段代码:

var indices = [String:[Int:Double]]()
apps.forEach { app in indices[app] = [Int:Double]()}
    
var index = 0
timeSeries.forEach { entry in
    entry.apps.forEach{ (arg: (key: String, value: Double)) in
        let (app, value) = arg
        indices[app]?[index] = value
    }
        
    index += 1
}

所以我有签名:

var parameters = timeSeries.map{ entry in entry.apps as [String:Any] }
var indices = getIndices(with: apps, in: parameters) as? [String:[Int:Double]] ?? [String:[Int:Double]]()

和方法:

func getIndices(with source: [String], in entryParameters: [[String:Any]]) -> [String:[Int:Any]] {
    var indices = [String:[Int:Any]]()
    source.forEach { item in indices[item] = [Int:Any]() }
    
    var index = 0
    entryParameters.forEach { (arg: (key: String, value: Any)) in
        let (key, value) = arg
        indices[key]?[index] = value
        
        index += 1
    }

    return indices
}

但这(仅在方法中，而不是原始方法中，效果很好)给出:'(key: String, value: Any)' is not convertible to '[String : Any]'在 entryParameters 行

我必须使用 Any 的原因是因为另一个来源是 [String:[Int:Bool]]

编辑:更多细节:

时间序列是[TimeSeriesEntry]

// this will need to be defined per-model, so in a different file in final project
struct TimeSeriesEntry: Codable, Equatable {
    let id: String
    let uid: String
    let date: Date
    let apps: [String:Double]
    let locations: [String:Bool]
    
    func changeApp(app: String, value: Double) -> TimeSeriesEntry {
        var apps = self.apps
        apps[app] = value
        
        return TimeSeriesEntry(id: self.id, uid: self.uid, date: self.date, apps: apps, locations: self.locations)
    }
}

注意事项:

更改调用签名，感谢印象。问题依然存在。

Answer 1

问题是 entryParameters 中的每个值都是一个字典，所以当您执行 entryParameters.forEach 时，您在闭包中得到的字典类型不是 (key, value )。

当你在这个字典上调用forEach时，你会得到(key,value)。所以你的方法应该看起来像这样:

func getIndices(with source: [String], in entryParameters: [[String:Any]]) -> [String:[Int:Any]] {
    var indices = [String:[Int:Any]]()
    source.forEach { item in indices[item] = [Int:Any]() }

    var index = 0
    entryParameters.forEach { entry in
        entry.forEach {(arg: (key: String, value: Any)) in
            let (key, value) = arg
            indices[key]?[index] = value
        }

        index += 1
    }

    return indices
}