如何初始化包含另一个结构数组的结构？
我想创建一个发票条目，其中的所有属性和项目都具有一个 InvoiceItem 数组。
此外，当发票仍为草稿时，项目可以为空。
从服务器读取带有发票数据和项目的 JSON 响应工作正常。
关于我拥有的 View Controller 的保存操作:
var invoice: Invoice?
var client: Client?
var invoiceItems : [InvoiceItem] = [InvoiceItem]()
@IBAction func saveInvoice(_ sender: Any) {
...
invoice = Invoice(invoice_id: invoice?.invoice_id, client_id: client_id, tax: 0.00, date_issue: dateIssue, due_date: dueDate,
amount_paid: 0.00,
date_transaction: "0000-00-00",
voided: 0,
note: "",
invoice_number: "",
status: "",
items: invoiceItems
)
override func viewDidLoad() {
...
invoiceItems = (invoice?.items)!
...
}
我收到此错误:无法将类型“[InvoiceItem]”的值转换为预期的参数类型“InvoiceItem”，在线:项目:invoiceItems
struct InvoiceItem: Codable {
var invoice_detail_id: Int!
let description: String!
let unit_price: Decimal!
let quantity: Decimal!
init(invoice_detail_id: Int! = nil, description: String, unit_price: Decimal, quantity: Decimal) {
self.invoice_detail_id = invoice_detail_id
self.description = description
self.unit_price = unit_price
self.quantity = quantity
}
}
struct Invoice: Codable {
var invoice_id: Int!
let client_id: Int!
let tax: Decimal!
let date_issue: String!
let due_date: String!
let amount_paid: Decimal!
let date_transaction: String!
let voided: Int!
let note: String!
let invoice_number: String!
let status: String!
let items: [InvoiceItem]!
init(invoice_id: Int! = nil, client_id: Int! = nil,tax: Decimal, date_issue: String, due_date: String, amount_paid: Decimal, date_transaction: String, voided: Int, note: String, invoice_number: String, status: String, items: InvoiceItem) {
self.invoice_id = invoice_id
self.client_id = client_id
self.tax = tax
self.date_issue = date_issue
self.due_date = due_date
self.amount_paid = amount_paid
self.date_transaction = date_transaction
self.voided = voided
self.note = note
self.invoice_number = invoice_number
self.status = status
self.items = [items]
}
}
最佳答案
您的发票初始化有 items: InvoiceItem 作为参数。项目的类型是 InvoiceItem，不是 InvoiceItem 的数组。
将类型更改为 InvoiceItem 的数组。
编辑:
在您的 Invoice init 中，您有:
self.items = [items]
您试图将 InvoiceItem 数组传递给定义为 items: InvoiceItem 的参数。
那显然不行，所以我告诉你将参数类型更改为 InvoiceItem 的数组。
现在您已将 InvoiceItem 数组包装在数组中。所以你有一个由 InvoiceItem 组成的数组。
将该行代码更改为:
self.items = items
关于arrays - Swift - 将结构数组传递给另一个结构的初始化，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49034286/