From e8821c3d5f434aeb022d8fb9d6ab0b5c99be34c9 Mon Sep 17 00:00:00 2001
From: 2betop <2betop.cn@gmail.com>
Date: Thu, 10 Dec 2020 19:17:30 +0800
Subject: [PATCH] =?UTF-8?q?iframe=20=E9=97=AE=E9=A2=98=E4=BF=AE=E5=A4=8D?=
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---
 src/renderers/IFrame.tsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/renderers/IFrame.tsx b/src/renderers/IFrame.tsx
index 47c9acd1d..8d3d8aa0f 100644
--- a/src/renderers/IFrame.tsx
+++ b/src/renderers/IFrame.tsx
@@ -135,7 +135,7 @@ export default class IFrame extends React.Component<IFrameProps, object> {
 
   @autobind
   postMessage(type: string, data: any) {
-    (this.IFrameRef.current as HTMLIFrameElement).contentWindow?.postMessage(
+    (this.IFrameRef.current as HTMLIFrameElement)?.contentWindow?.postMessage(
       {
         type: `amis:${type}`,
         data
@@ -162,6 +162,7 @@ export default class IFrame extends React.Component<IFrameProps, object> {
 
     if (
       typeof finalSrc === 'string' &&
+      finalSrc &&
       !/^(\.\/|\.\.\/|\/|https?\:\/\/|https?\%3A\%2F\%2F)/.test(finalSrc)
     ) {
       return <p>请填写合法的 iframe 地址</p>;