show
fun showCustomContents(promotionCustomType: Promotion.PromotionCustomType, contentsKey: String, listener: Promotion.PromotionViewListener)
외부 컨텐츠를 사용하기 위해서 커스텀 웹 뷰 노출
Show custom Webview to use external content.
Parameters
promotion
PromotionCustomType Type
contents
ID of the custom web page set in the back office.
listener
API call result listener