问题[swift]

初学程序员，感谢您的帮助，指定一个值为[Int:Double]的字典，通过函数返回一个值为[Int:Int]的字典，其中key为常量值， value值比最初指定的值减少了10倍。尝试使用dictionary.values / 10并分配给所有值，但给出错误 func food(set: [Int: Double]) -> [Int: Int] { userPoints varpoints = userPoints varvaluesArray = [points.values]valuesArray.map { Int($0)/10 } } } userPoints - 封装

func food(set: [Int: Double]) -> [Int: Int] {

userPoints
var points: [Int: Double] = userPoints
var valuesArray = [points.values]
var points2: [Int: Int] = points.mapValues(Int.init)
return points2
}

打印（食物.point2）

我这样做了，但被输出和打印结果卡住了

我有一些数据数组，首先，我将字符串日期值转换为日期类型，然后创建一个字典，其中这些相同的日期作为键。但我需要的值不是从中获取这些日期的模型，而是一组相应的行（标题）。我怎样才能实现这个？

    static var newModels = [NewNewsRecordModel]()
    static var sortedMassWithSections = [SectionModel]()
    static var models: [NewsRecordModel]

    func translate() {
        for model in Transducer.models {
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
            if let date = dateFormatter.date(from: model.publishedAt) {
                let newModel = NewNewsRecordModel(title: model.title, publishedAt: date)
                Transducer.newModels.append(newModel)
            }
        }
    }
    
    func sortingByDictionaryToMass() {
        let calendar = Calendar.current
        let dict = Dictionary(grouping: Transducer.newModels) { (model) -> Date in
            let components = calendar.dateComponents([.year, .month, .day], from: model.publishedAt)
            let finalDate = calendar.date(from: components)
            return finalDate!
        }
        
        for element in dict {
            // Need to translate values from NewNewsRecordModel into String
            let sectionModel = SectionModel(sectionTitle: element.key, cell: element.value)
            Transducer.sortedMassWithSections.append(sectionModel)
            // Need to sort sortedMassWithSections by first element in two-dimensional array
        }
        
    }

struct NewNewsRecordModel {
    let title: String
    var publishedAt: Date
}

struct SectionModel {
    let sectionTitle: Date
    let cell: [NewNewsRecordModel]
}

struct NewsRecordModel {
    let title: String
    var publishedAt: String
}

我有一个包含多个文件的项目。问题如下：是否可以在没有完全编译的情况下运行一个单独的文件，以便检查其中某个方法的功能？

我有一个协议（无法更改！即使通过例外）

protocol CalorieCountProtocol {
     var calories: Int { get }
     func description() -> String
}

我正在尝试实现这样的枚举：

enum SomeEnum: CalorieCountProtocol {
    case calories(Int)
    func description() -> String {
        switch self {
        case .calories(10):
            return "wtf where elon musk its just 10 calories"
        default:
            return "yeeeeah its elon musk"
        }
    }
}

let someEnumTest: SomeEnum = SomeEnum.calories(10)

但我收到错误：

Type 'SomeEnum' does not conform to protocol 'CalorieCountProtocol'

Xcode 建议将卡路里作为变量添加到枚举中，但我不能在枚举中这样做？

请告诉我如何做到当从 Picker 字段中选择某个值时，Text 字段中的结果会自动更改。我写了代码，但它给出了一个错误 Type '()' cannot conform to 'View'。这是代码：

import SwiftUI

struct ContentView: View {
    
    @State private var years: [String] = ["2010", "2011", "2012"]
    @State private var selectedYearIndex = 2
    @State private var resultText = ""
    
    
    var body: some View {
        
        switch selectedYearIndex {
        case 0:
            self.resultText = "Hello"
        case 1:
            self.resultText = "Hi"
        case 2:
            self.resultText = "Bye"
        default:
            self.resultText = "No"
        }
        
        VStack {
            Text("Result Text:")
            Spacer()
            Text("\(resultText)")
            Spacer()
            
            Picker("Choose a Year", selection: $selectedYearIndex) {
                
                ForEach(0..<years.count) {
                    Text("\(years[$0])").font(.title)
                }
                
            }
            
        }
    }
}