Implement Google Analytics in ios swift

Question

I am following the Analytics for iOS (developers.google.com/analytics/devguides/collection/ios/v3/?ver=swift) guide and I\'ve got errors in my Swift code Project that I can\'t f

Answer 1

There are two options for implementation with Google Analytics using CocoaPods.

1. pod 'Google/Analytics'
2. pod 'GoogleAnalytics'

There are pros and cons between them.

pod 'Google/Analytics'

• need google configuration file(GoogleService-Info.plist)
• simple bridging header file. Just add #import in bridging header file.
• add import Googlein every file you want to implement google analytics.

pod 'GoogleAnalytics'

• no google configuration file(GoogleService-Info.plist)
• more complex bridging header file.

I prefer to use pod 'GoogleAnalytics' but I'll explain how to solve this issue using pod 'Google/Analytics' because the google official site recommends pod 'Google/Analytics'.

1. bridging header

You just need one line of code for google analytics.

#import 

Don't forget to set target-build setting for Objective-C-Bridging-Header. You have to provide correct path to enable Objective-C-Bridging-Header.

Set Target-Build Setting-Objective-C-Bridging-Header $(SRCROOT)/$(PRODUCT_NAME)/projectName_Bridging_Header.h

2. AppDelegate.swift

import Google

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?)
-> Bool { self.setupGoogleAnalytics()
..
     self.setupGoogleAnalytics()
..
 }

func setupGoogleAnalytics() {

    // Configure tracker from GoogleService-Info.plist.
    let configureError:NSError?
    GGLContext.sharedInstance().configureWithError(&configureError)
    assert(configureError == nil, "Error configuring Google services: \(configureError)")

    let gai = GAI.sharedInstance()
    gai.trackUncaughtExceptions = true  // report uncaught exceptions
    gai.logger.logLevel = GAILogLevel.Verbose  // remove before app release
}

3. SomeViewController.swift

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(true)

    if let default_tracker = GAI.sharedInstance().defaultTracker {
        #if DEBUG

            print("default tracker")

        #endif
    }

    //        let tracker = GAI.sharedInstance().defaultTracker
    let tracker = GAI.sharedInstance().trackerWithTrackingId("tracking_ID")
    tracker.set(kGAIScreenName, value: screenName)
    let builder = GAIDictionaryBuilder.createScreenView()
    tracker.send(builder.build() as [NSObject : AnyObject])

}

Why do I use trackerWithTrackingId instead of defaultTracker property? You could got an error if you use defaultTracker :

fatal error: unexpectedly found nil while unwrapping an Optional value

defaultTracker property's initial value is nil, but it will be set after trackerWithTrackingId method is called. But it doesn't work perfectly sometimes. To avoid this issue, I recommend that use trackerWithTrackingId method directly.

I make the sample project using pod 'GoogleAnalytics'. You can get an idea from it. Good luck.

Test Env

GoogleAnalytics 3.14

Xcode 7.2.1