在主线程上接收@Published

Question

我有以下代码给我以下错误消息：

  class Variables: ObservableObject {
    @Published var isNotificationsEnabled: Bool = false
  }

  @EnvironmentObject var v: Variables

  func notificationsEnabled() {
    let current = UNUserNotificationCenter.current()

    current.getNotificationSettings(completionHandler: { (settings) in
        if settings.authorizationStatus == .notDetermined {
          v.isNotificationsEnabled = false
        } else if settings.authorizationStatus == .denied {
            // Notification permission was previously denied, go to settings & privacy to re-enable
          v.isNotificationsEnabled = false
        } else if settings.authorizationStatus == .authorized {
            // Notification permission was already granted
          v.isNotificationsEnabled = true
        }
    })
  }

Publishing changes from background threads is not allowed; make sure to publish values from the main thread (via operators like receive(on:)) on model updates.

我能做些什么来解决这个问题？ 我无法更改已发布的变量

Answer 1

将if包装在DispatchQueue.main.async中