[SWIFT]subView 레이어 순서 변경

if let effectWebViewIndex = self.view.subviews.firstIndex(of: self.effectBrigeWebView),
   let gameWebViewIndex = self.view.subviews.firstIndex(of: self.gameBrigeWebView) {
                    
	log(direction: .ETC, ofType: self, datas: "effect Index : \(effectWebViewIndex) / game Index : \(gameWebViewIndex)")
    // 레이어 인덱스 변경                 
	self.view.exchangeSubview(at: effectWebViewIndex, withSubviewAt: gameWebViewIndex)
}