GA4 - iOS - Swift - select_item

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

//Once a user selects a particular product from the list, log a select_item event with the chosen product in an items array parameter.

// 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 selectedItem: [String: Any] = [
  AnalyticsParameterItemListID: "L001",                             //The ID of the list in which the item was presented to the user (NSString).
  AnalyticsParameterItemListName: "Related products",               //The name of the list in which the item was presented to the user (NSString).
]

// Add items array for selected product (for example, jeggings)
selectedItem[AnalyticsParameterItems] = [jeggings]                  //The list of items involved in the transaction. (NSArray).

// Log select item event to Firebase Analytics
Analytics.logEvent(AnalyticsEventSelectItem, parameters: selectedItem)