Only add logger function in app delegate once and get logs from every screen:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
// Ensure swizzling happens at app launch to log screens
UIViewController.swizzleViewDidAppear
//// rest of your code...........
Create a logger File "ViewContronller+Extension.swift"
import UIKit
import Foundation
import FirebaseAnalytics
extension UIViewController {
/// Tracks the screen view event using Firebase Analytics.
/// - Parameters:
/// - screenName: Custom name for the screen. If not provided, the view controller's class name is used.
/// - screenClass: Optional custom class name. Defaults to the view controller's class.
func trackScreenView(screenName: String? = nil, screenClass: String? = nil) {
let name = screenName ?? String(describing: type(of: self))
let className = screenClass ?? String(describing: type(of: self))
Analytics.logEvent(AnalyticsEventScreenView, parameters: [
AnalyticsParameterScreenName: name,
AnalyticsParameterScreenClass: className
])
}
/// Returns the name of the current screen, which is the view controller's class name.
var currentScreenName: String {
return String(describing: type(of: self))
}
/// Returns the class name of the current screen.
var currentScreenClass: String {
return NSStringFromClass(type(of: self))
}
/// Logs the screen view event using Firebase Analytics.
func logScreenViewEvent() {
print("FireBase Log: CSreenName \(currentScreenName), CScreenClass: \(currentScreenClass)")
Analytics.logEvent(AnalyticsEventScreenView, parameters: [
AnalyticsParameterScreenName: currentScreenName,
AnalyticsParameterScreenClass: currentScreenClass
])
}
}
extension UIViewController {
// Swizzle the `viewDidAppear` method
static let swizzleViewDidAppear: Void = {
let originalSelector = #selector(UIViewController.viewDidAppear(_:))// original fuinction
let swizzledSelector = #selector(swizzled_viewDidAppear(_:))// Swizzled Function
guard let originalMethod = class_getInstanceMethod(UIViewController.self, originalSelector),
let swizzledMethod = class_getInstanceMethod(UIViewController.self, swizzledSelector) else { return}
method_exchangeImplementations(originalMethod, swizzledMethod)// Swicth the functions
}()
// New implementation of `viewDidAppear`
@objc func swizzled_viewDidAppear(_ animated: Bool) {
swizzled_viewDidAppear(animated)// Call the original `viewDidAppear` (actually the swizzled method)
logScreenViewEvent()// Log the screen view event
}
}
// Ensure swizzling happens at app launch
extension UIApplication {
private static let runOnce: Void = {
UIViewController.swizzleViewDidAppear
}()
override open var next: UIResponder? { // calling original functionality after logging
UIApplication.runOnce
return super.next
}
}
