将Google跟踪代码管理器与Xamarin Google Analytics（分析）组件一起使用会导致错误

Question

I'm trying to implement tracking using Google Tag Manager in an iOS app built with Xamarin, but I fail to get a container. I end up with this error in my application log: "GoogleTagManager error: notifier must be non-nil".

I used the Google Tag Manager Getting Started guide on the Google Developers website to fabricate this code piece.

public class TagManagerService : NSObject, ITAGContainerOpenerNotifier
{
    TAGContainer container;
    readonly TAGDataLayer dataLayer;
    readonly TAGManager tagManager;

    public TagManagerService()
    {
        tagManager = TAGManager.GetInstance;
        dataLayer = tagManager.DataLayer;

        #if DEBUG
        tagManager.Logger.LogLevel = TAGLoggerLogLevelType.Verbose;
        #endif

        TAGContainerOpener.OpenContainer(Constants.TagManagerContainerId, tagManager, TAGOpenType.PreferFresh, 0, this);
    }

    public void ContainerAvailable(TAGContainer container)
    {
        this.container = container;
    }
}

Answer 1

This bug was fixed on latest version of Google Analytics library 3.0.10.3 according to Xamarin Dev team .

You can check the library page here for more instructions.

Answer 2

If you have to do take it further for enhanced ecommerce implementation, which you should be doing if wants to strength app conversion, check out my blog post on how to do it.

The key is on the proper object structure for nested values on gtm like below sample code

NSMutableArray products = new NSMutableArray ();
        if (LIST != null && LIST.Count > 0) {
            foreach (var b in LIST) {
                NSDictionary p = new NSDictionary ("name", b.name, "id", b.id,
                    "price", b.total, "category", b.category, "quantity", b.quantity);

                products.Add (NSObject.FromObject (p));
            }

            NSDictionary actionField = new NSDictionary ("id", "value", "revenue", "value", "tax", "value", "shipping", "value", "coupon","value");
            NSDictionary purchase = new NSDictionary ("purchase", new NSDictionary ("products", NSObject.FromObject(products) , "actionField", NSObject.FromObject(actionField)));

            NSDictionary data = new NSDictionary ("event", "purchase", "ecommerce", NSObject.FromObject(purchase));

            manager.DataLayer.Push (data);
        }