将 Firebase 分析与 SwiftUI 一起使用

Question

I recently installed Firebase Analytics in my SwiftUI app. Everything works great except the automatic screen views. Am I obligated to call AnalyticsEventScreenView for every view I would like to track?

Answer 1

Yes - due to the way SwiftUI views are structured, Analytics only sees NotifyingMulticolumnSplitViewController .

You'll have to send screen views manually (as stated in the docs ), like this:

import SwiftUI
import Firebase

struct ContentView: View {
  var body: some View {
    NavigationView {
      List {
        NavigationLink(destination: OneView()) {
          Text("One")
        }
        NavigationLink(destination: TwoView()) {
          Text("Two")
        }
      }
      .navigationTitle("Choose a screen")
      .onAppear() {
        Analytics.logEvent(AnalyticsEventScreenView,
                           parameters: [AnalyticsParameterScreenName: "\(ContentView.self)",
                                        AnalyticsParameterScreenClass: "\(ContentView.self)"])
      }
    }
  }
}

struct ContentView_Previews: PreviewProvider {
  static var previews: some View {
    ContentView()
  }
}

import SwiftUI
import Firebase

struct OneView: View {
  var body: some View {
    Text("1")
      .onAppear() {
        Analytics.logEvent(AnalyticsEventScreenView,
                           parameters: [AnalyticsParameterScreenName: "\(OneView.self)",
                                        AnalyticsParameterScreenClass: "\(OneView.self)"])
      }
  }
}

struct OneView_Previews: PreviewProvider {
  static var previews: some View {
    OneView()
  }
}

Answer 2

Same Peter's answer but automatically generating the ids

import SwiftUI
import Firebase

struct OneView: View {
  var body: some View {
    Text("1")
      .onAppear() {
        Analytics.logEvent(AnalyticsEventScreenView,
                           parameters: [AnalyticsParameterScreenName: "\(type(of: self))",
                                        AnalyticsParameterScreenClass: "\(type(of: self))"])
      }
  }
}

struct OneView_Previews: PreviewProvider {
  static var previews: some View {
    OneView()
  }
}

Answer 3

Firebase 9.0.0 has introduced new APIs that are specific to SwiftUI and have exited beta. There is now a View extension that implements a ViewModifier that provides you some functionality:

func analyticsScreen(name: String, 
                     class: String = "View", 
                     extraParameters: [String: Any] = [:])

Analytics+SwiftUI.swift

For example:

struct MyView: View {
  var body: some View {
    Text("Hey")
       .analyticsScreen(
           name: "Screen Name", 
           extraParameters: [
              AnalyticsParameterScreenName: "\(type(of: self))",
              AnalyticsParameterScreenClass: "\(type(of: self))"
           ]
       )  
   }
}