小编Дми*_*син的帖子

无法pip install Twisted [windows_platform]使用 Python 3.8.0 在 Windows 10 上安装 Twisted with 。错误：

ERROR: Command errored out with exit status 1:
     command: 'c:\users\darkfox\appdata\local\programs\python\python38\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\darkfox\\AppData\\Local\\Temp\\pip-install-m3igdq78\\Twisted\\setup.py'"'"'; __file__='"'"'C:\\Users\\darkfox\\AppData\\Local\\Temp\\pip-install-m3igdq78\\Twisted\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\darkfox\AppData\Local\Temp\pip-install-m3igdq78\Twisted\pip-egg-info'
         cwd: C:\Users\darkfox\AppData\Local\Temp\pip-install-m3igdq78\Twisted\
    Complete output (83 lines):
    Traceback (most recent call last):
      File "c:\users\darkfox\appdata\local\programs\python\python38\lib\urllib\request.py", line 1317, in do_open
        h.request(req.get_method(), req.selector, req.data, headers,
      File "c:\users\darkfox\appdata\local\programs\python\python38\lib\http\client.py", line 1230, in request
        self._send_request(method, url, body, headers, encode_chunked)

   //delete fragment

      File "c:\users\darkfox\appdata\local\programs\python\python38\lib\ssl.py", line 1309, …

ScrollView 加载数据后不更新。只有在我切换到另一个屏幕并返回后，ScrollView 才能成功显示数据。 https://youtu.be/0q3R6LaKbnE

对于异步图像加载，请使用：https : //github.com/dmytro-anokhin/url-image

import Combine
import SwiftUI

class NewsAPI: ObservableObject {

    @Published var articles: Articles = [Article]()

    init() {
        guard let url: URL = URL(string: "https://newsapi.org/v2/top-headlines?country=ru&apiKey=376a97643c6c4633afe57427b71e8ebd") else { return }
        URLSession.shared.dataTask(with: url) { (data, response, error) in
            do {
                guard let json = data else { return }
                let welcome = try JSONDecoder().decode(ModelNews.self, from: json)
                DispatchQueue.main.async {
                    self.articles = welcome.articles!
                }
            }
            catch {
                print(error)
            }
        }
        .resume()
    }
}

struct CardList: View {

    @ObservedObject …

我创建了一个能够通过以下方法删除行的列表：.onDelete (perform:)。

List {
   ForEach(itemList.dataLocation) { item in
      NavigationLink(destination: ListDetails(name: item.nameDB)) {
           ListItem(name: item.nameDB)
      }
   }
   .onDelete(perform: delete)
   .onMove(perform: move)
}


func delete(at offsets: IndexSet) {
        itemList.dataLocation.remove(atOffsets: offsets)
        session.deleteData(id: //id row) //this problem
}

如何将已删除字符串的值传递给函数？建议仍然从该行获取数据。提前致谢！

我遇到了这样的问题，有没有人有任何想法如何解决它？Xcode 11.2，SwiftUI

.onAppear(perform: self.sessionChat.loadMsgInChatRoom(chatRoom: chatRoom)) //then an error

func loadMsgInChatRoom(chatRoom: String) {
        let db = Firestore.firestore()
        db.collection("chatRoom").document(chatRoom).collection("msg")
            .addSnapshotListener { (querySnapshot, err) in
            if err != nil {
                print((err?.localizedDescription)!)
                return
            }
            for i in querySnapshot!.documentChanges {
                if i.type == .added {
                    let user = i.document.get("user") as! String
                    let msg = i.document.get("msg") as! String
                    let idUser = i.document.get("idUser") as! String
                    let dateMsg = i.document.get("dateMsg") as! String
                    let id = i.document.documentID

                    self.msgs.append(dataMessges(id: id, user: user, msg: msg, idUser: idUser, dateMsg: dateMsg))
                }
            } …