[flutter][brandpay] 초기화 오류

This method should not be called on the main thread as it may lead to UI unresponsiveness.

This method should not be called on the main thread as it may lead to UI unresponsiveness.

@override
Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("Tosspayments Flutter Sample")),

        body: WebView(
            initialUrl: "#### 웹뷰 URL을 설정하세요 #####",
            onPageStarted: (url) {},
            onPageFinished: (url) {},
            navigationDelegate: (request) async {
                Uri uri = Uri.parse(request.url);
                String finalUrl = request.url;

             
                        launchUrlString(finalUrl); 
             
                return NavigationDecision.prevent;
            },
            javascriptMode: JavascriptMode.unrestricted,
        ),
    );
}

@override
Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("Tosspayments Flutter Sample")),

        body: WebView(
            initialUrl: "#### 웹뷰 URL을 설정하세요 #####",
            onPageStarted: (url) {},
            onPageFinished: (url) {},
            navigationDelegate: (request) async {
                Uri uri = Uri.parse(request.url);
                String finalUrl = request.url;

             
                        launchUrlString(finalUrl); 
             
                return NavigationDecision.prevent;
            },
            javascriptMode: JavascriptMode.unrestricted,
        ),
    );
}

const _prepare = useCallback(async () => {
        try {
            let brandpay = await loadBrandPay(
                process.env.NEXT_PUBLIC_TOSS_CLIENT_KEY!,
                userId,
                {
                    redirectUrl: process.env.NEXT_PUBLIC_TOSS_CALLBACK_URL,
                    ui: {
                        highlightColor: "#26C2E3",
                        buttonStyle: "full",
                    },
                    windowTarget: "iframe",
                }
            );
            brandpayRef.current = brandpay;
            await brandpay.addPaymentMethod("카드");
        } catch (error: any) {
            console.log("error======>", error);
        }
    }, [userId]);

const _prepare = useCallback(async () => {
        try {
            let brandpay = await loadBrandPay(
                process.env.NEXT_PUBLIC_TOSS_CLIENT_KEY!,
                userId,
                {
                    redirectUrl: process.env.NEXT_PUBLIC_TOSS_CALLBACK_URL,
                    ui: {
                        highlightColor: "#26C2E3",
                        buttonStyle: "full",
                    },
                    windowTarget: "iframe",
                }
            );
            brandpayRef.current = brandpay;
            await brandpay.addPaymentMethod("카드");
        } catch (error: any) {
            console.log("error======>", error);
        }
    }, [userId]);

 let brandpay = await loadBrandPay(
                process.env.NEXT_PUBLIC_TOSS_CLIENT_KEY!,
                userId,

 let brandpay = await loadBrandPay(
                process.env.NEXT_PUBLIC_TOSS_CLIENT_KEY!,
                userId,

var brandpay = BrandPay(clientKey, customerKey, {
  redirectUrl: 'http://example.com',
  ui: {
    highlightColor: '#26C2E3',
    buttonStyle: 'full',
    labels: {
      oneTouchPay: '내 상점 원터치결제',
    },
  },
  windowTarget: 'iframe'
})

var brandpay = BrandPay(clientKey, customerKey, {
  redirectUrl: 'http://example.com',
  ui: {
    highlightColor: '#26C2E3',
    buttonStyle: 'full',
    labels: {
      oneTouchPay: '내 상점 원터치결제',
    },
  },
  windowTarget: 'iframe'
})

var brandpay = BrandPay(clientKey, customerKey, {
  redirectUrl: 'http://example.com',
  ui: {
    highlightColor: '#26C2E3',
    buttonStyle: 'full',
    labels: {
      oneTouchPay: '내 상점 원터치결제',
    },
  },
  windowTarget: 'iframe'
})

var brandpay = BrandPay(clientKey, customerKey, {
  redirectUrl: 'http://example.com',
  ui: {
    highlightColor: '#26C2E3',
    buttonStyle: 'full',
    labels: {
      oneTouchPay: '내 상점 원터치결제',
    },
  },
  windowTarget: 'iframe'
})

controller.runJavaScript(
        "window.dispatchEvent(new CustomEvent('customerEventHandler', { detail: { userId: '$userId' } }));",
      );

controller.runJavaScript(
        "window.dispatchEvent(new CustomEvent('customerEventHandler', { detail: { userId: '$userId' } }));",
      );