GA4 - iOS - Swift - view_item

// Products can be instrumented as an array of items that can be added to prescribed ecommerce events.

//To measure how many times product details are viewed, log a view_item event whenever a user views a product’s details screen.


// A pair of jeggings (product1)
var jeggings: [String: Any] = [
  AnalyticsParameterItemID: "SKU_123",                      //Item ID (context-specific) (NSString).
  AnalyticsParameterItemName: "jeggings",                   //Item Name (context-specific) (NSString).
  AnalyticsParameterItemCategory: "pants",                  //Item category (context-specific) (NSString).
  AnalyticsParameterItemCategory2: "sub-cat1",              //Item sub-category (context-specific) (NSString).
  AnalyticsParameterItemCategory3: "sub-cat2",              //Item sub-category (context-specific) (NSString).
  AnalyticsParameterItemCategory4: "sub-cat3",              //Item sub-category (context-specific) (NSString).
  AnalyticsParameterItemCategory5: "sub-cat4",              //Item sub-category (context-specific) (NSString).
  AnalyticsParameterItemVariant: "black",                   //Item variant (NSString).
  AnalyticsParameterItemBrand: "Google",                    //Item brand (NSString).
  AnalyticsParameterPrice: 9.99,                            //Product price (double as NSNumber).
]
// Prepare ecommerce parameters
var productDetails: [String: Any] = [
  AnalyticsParameterCurrency: "USD",                //Currency of the product or items associated with the event, in 3-letter ISO_4217 format (NSString).
  AnalyticsParameterValue: 9.99                     //A context-specific numeric value which is accumulated automatically for each event type.
]

// Add items array
productDetails[AnalyticsParameterItems] = [jeggings]        //The list of items involved in the e-commerce action. (NSArray).

// Log view item event
Analytics.logEvent(AnalyticsEventViewItem, parameters: productDetails)