From 9a63697d7e6b6420a27b2351841e974f9c42cc8c Mon Sep 17 00:00:00 2001
From: SAITO Tomomi <t-saito@project-flora.net>
Date: Tue, 1 Aug 2017 10:03:38 +0900
Subject: [PATCH] Prevent crash if build with Xcode 9.0.

Since Xcode 9.0, the app crashes when calling decisionHandler twice or more in -[WKWebViewJavascriptBridge webView:decidePolicyForNavigationAction:decisionHandler:].
---
 WebViewJavascriptBridge/WKWebViewJavascriptBridge.m | 1 +
 1 file changed, 1 insertion(+)

diff --git a/WebViewJavascriptBridge/WKWebViewJavascriptBridge.m b/WebViewJavascriptBridge/WKWebViewJavascriptBridge.m
index 47667df6..73c923db 100644
--- a/WebViewJavascriptBridge/WKWebViewJavascriptBridge.m
+++ b/WebViewJavascriptBridge/WKWebViewJavascriptBridge.m
@@ -147,6 +147,7 @@ - (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigati
             [_base logUnkownMessage:url];
         }
         decisionHandler(WKNavigationActionPolicyCancel);
+        return;
     }
     
     if (strongDelegate && [strongDelegate respondsToSelector:@selector(webView:decidePolicyForNavigationAction:decisionHandler:)]) {