From cc57761da91c6e8814156c2e1f3110b2bd8b0910 Mon Sep 17 00:00:00 2001
From: CloudWebRTC <duanweiwei1982@gmail.com>
Date: Fri, 21 May 2021 20:37:06 +0800
Subject: [PATCH] Fix crash when appName is not set.

---
 ios/Classes/CallKeep.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ios/Classes/CallKeep.m b/ios/Classes/CallKeep.m
index 681a52c..498e3d7 100644
--- a/ios/Classes/CallKeep.m
+++ b/ios/Classes/CallKeep.m
@@ -580,7 +580,11 @@ + (CXProviderConfiguration *)getProviderConfiguration:(NSDictionary*)settings
 #ifdef DEBUG
     NSLog(@"[CallKeep][getProviderConfiguration]");
 #endif
-    CXProviderConfiguration *providerConfiguration = [[CXProviderConfiguration alloc] initWithLocalizedName:settings[@"appName"]];
+    NSString *appName = @"Unknown App";
+    if (settings != nil) {
+        appName = settings[@"appName"];
+    }
+    CXProviderConfiguration *providerConfiguration = [[CXProviderConfiguration alloc] initWithLocalizedName:appName];
     providerConfiguration.supportsVideo = YES;
     providerConfiguration.maximumCallGroups = 3;
     providerConfiguration.maximumCallsPerCallGroup = 1;