【发布时间】：2021-07-09 15:18:02
【问题描述】：
我正在尝试从联系人列表中查看联系人的详细信息。这是该视图的 WIP。我收到错误消息；
在调用中缺少参数“data”、“detailedData”的参数
在ContactDetail_Previews 结构中与ContactDetail() 一致。
我想我理解这是因为变量 data 和 detailData 中缺少某些内容，但我的困惑来自于我如何将类似的代码用于所有联系人的实际列表视图，而没有此类错误。我已将整个列表视图的代码粘贴在详细视图的代码下方。
任何帮助将不胜感激！
联系方式代码：
import SwiftUI
struct ContactDetail: View {
var data: Response_Detailed.Contact_Detailed
@ObservedObject var detailedData: getData_Detailed
var body: some View {
VStack {
Text(data.first_name + " " + data.last_name)
Text(data.phone_number)
Text(data.birthday)
Text(data.address)
Text(data.updated_date)
Text(data.create_date)
.onAppear {
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
self.detailedData.updateDetailed_Data()
}
}
}
}
}
class getData_Detailed: ObservableObject {
@Published var data = [Response_Detailed.Contact_Detailed]()
@Published var id = 1
init() {
updateDetailed_Data()
}
func updateDetailed_Data() {
let url = "DATABASE_LINK\(id)"
let session = URLSession(configuration: .default)
session.dataTask(with: URL(string: url)!) { (data, _, err) in
if err != nil {
print((err?.localizedDescription)!)
return
}
do {
let json = try JSONDecoder().decode(Response_Detailed.self, from: data!)
let oldData = self.data
DispatchQueue.main.async {
self.data = oldData + json.data
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
let data = try! encoder.encode(json)
print(String(data: data, encoding: .utf8)!)
}
}
catch {
print(error.localizedDescription)
}
}.resume()
}
}
struct ContactDetail_Previews: PreviewProvider {
static var previews: some View {
ContactDetail()
}
}
struct Response_Detailed: Codable {
struct Contact_Detailed: Codable, Identifiable {
public let id: Int
public let first_name: String
public let last_name: String
public let birthday: String
public let phone_number: String
public let create_date: String
public let updated_date: String
public let address: String
}
public let data: [Contact_Detailed]
enum CodingKeys : String, CodingKey {
case data = "data"
}
}
联系人列表查看代码：（注意与NavigationLink 相同的错误。
import SwiftUI
struct ContentView: View {
var body: some View {
NavigationView {
HStack {
ContactsList()
.navigationBarTitle("Contacts")
.toolbar {
ToolbarItem(placement: .navigationBarTrailing) {
Image(systemName: "plus")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 20.0)
}
}
}
}
}
}
struct ContactsList: View {
@ObservedObject var listData = getData()
var body: some View {
List(0..<listData.data.count, id: \.self) {i in
NavigationLink(destination: ContactDetail()) {
if i == self.listData.data.count - 1 {
cellView(data: self.listData.data[i], isLast: true, listData: self.listData)
}
else {
cellView(data: self.listData.data[i], isLast: false, listData: self.listData)
}
}
}
}
}
struct cellView: View {
var data: Response.Contact
var isLast: Bool
@ObservedObject var listData: getData
var body: some View {
VStack(alignment: .leading, spacing: 12) {
if self.isLast {
Text(data.first_name + " " + data.last_name)
.fontWeight(/*@START_MENU_TOKEN@*/.bold/*@END_MENU_TOKEN@*/)
.font(.title2)
.padding(/*@START_MENU_TOKEN@*/[.leading, .bottom, .trailing], 5.0/*@END_MENU_TOKEN@*/)
.onAppear {
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
self.listData.updateData()
}
}
}
else {
Text(data.first_name + " " + data.last_name)
.fontWeight(/*@START_MENU_TOKEN@*/.bold/*@END_MENU_TOKEN@*/)
.font(.title2)
.padding(/*@START_MENU_TOKEN@*/[.leading, .bottom, .trailing], 5.0/*@END_MENU_TOKEN@*/)
}
}
.padding(.top, 10)
}
}
class getData: ObservableObject {
@Published var data = [Response.Contact]()
@Published var limit = 15
@Published var skip = 0
init() {
updateData()
}
func updateData() {
let url = "DATABASE_LINK?skip=\(skip)&limit=\(limit)"
let session = URLSession(configuration: .default)
session.dataTask(with: URL(string: url)!) { (data, _, err) in
if err != nil {
print((err?.localizedDescription)!)
return
}
do {
let json = try JSONDecoder().decode(Response.self, from: data!)
let oldData = self.data
DispatchQueue.main.async {
self.data = oldData + json.data
self.limit += 15
self.skip += 15
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
let data = try! encoder.encode(json)
print(String(data: data, encoding: .utf8)!)
}
}
catch {
print(error.localizedDescription)
}
}.resume()
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
struct Response: Codable {
struct Contact: Codable, Identifiable {
public let id: Int
public let first_name: String
public let last_name: String
public let updated_date: String
}
struct Pagination_Data: Codable {
public let skip: Int
public let limit: Int
public let total: Int
}
public let data: [Contact]
public let pagination: Pagination_Data
enum CodingKeys : String, CodingKey {
case data = "data"
case pagination = "pagination"
}
}
【问题讨论】：