I have a struct and I keep getting a extra arguments at positions error after I have added a decoder.I get the error on the return line. Any help would be appreciated. This issue only started happening as soon as I added the decoder to the struct so I am guesing now when I try to create a new instance of an Absence I need to do it slightly differently? I am quite new to SwiftUI Here is the code:

我有一个结构体，在我添加了一个解码器之后，我一直在位置错误处得到一个额外的参数。我在返回行上得到错误。任何帮助将不胜感激。这个问题只是在我将解码器添加到结构体后才开始发生，所以我猜现在当我尝试创建一个Absence的新实例时，我需要稍微改变一下？我是SwiftUI的新手，下面是代码：

struct Absence: Codable, Identifiable, Hashable {
    var id: Int
    var userId: Int
    var start: Date
    var end: Date
    var active: Bool
    var modifiedBy: Int
    var modified: Date
    
    // Custom initializer to handle date conversion
    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        id = try container.decode(Int.self, forKey: .id)
        userId = try container.decode(Int.self, forKey: .userId)
        active = try container.decode(Bool.self, forKey: .active)
        modifiedBy = try container.decode(Int.self, forKey: .modifiedBy)
        
        // Custom date decoding
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "MM/dd/yyyy" // Modify the date format as needed
        
        if let startDateString = try? container.decode(String.self, forKey: .start),
           let startDate = dateFormatter.date(from: startDateString) {
            start = startDate
        } else {
            start = Date() // Provide a default date if decoding fails
        }
        
        if let endDateString = try? container.decode(String.self, forKey: .end),
           let endDate = dateFormatter.date(from: endDateString) {
            end = endDate
        } else {
            end = Date() // Provide a default date if decoding fails
        }
        
        if let modifiedString = try? container.decode(String.self, forKey: .modified),
           let modifiedDate = dateFormatter.date(from: modifiedString) {
            modified = modifiedDate
        } else {
            modified = Date() // Provide a default date if decoding fails
        }
    }
    
    static func sampleData() -> Absence {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "MM/dd/yyyy" // Modify the date format as needed

        let startString = "01/01/2021"
        let endString = "01/02/2021"
        let modifiedString = "01/03/2021" // Change this to the appropriate date string

        let startDate = dateFormatter.date(from: startString) ?? Date()
        let endDate = dateFormatter.date(from: endString) ?? Date()
        let modifiedDate = dateFormatter.date(from: modifiedString) ?? Date()

        return Absence(id: 1, userId: 1, start: startDate, end: endDate, active: true, modifiedBy: 1, modified: modifiedDate)
    }}
    ```

Currently your init(...) only takes a single Decoder parameter, but you are calling Absence(id: 1, ...)
with many more parameters, that is the reason for the error.

当前您的初始化(...)只接受单个解码器参数，但您调用的是缺勤(id：1，...)对于更多的参数，这就是错误的原因。

So add another init(...) with the parameters you desire, such as:

因此，添加另一个init(...)具有您所需的参数，例如：

 init(id: Int, userId: Int, start: Date, end: Date, active: Bool, modifiedBy: Int, modified: Date) {
     self.id = id
     self.userId = userId
     self.start = start
     self.end = end
     self.active = active
     self.modifiedBy = modifiedBy
     self.modified = modified
 }

Note that, if you did not have init(from decoder: Decoder) ... you would automatically
get a memberwise initializer, if you have not defined any other custom initializers. See also the docs

请注意，如果您没有init（来自decoder：Decoder）.如果你没有定义任何其他的自定义初始化器，你会自动得到一个memberwise初始化器。另见文档