nullable return for GetLocalDescription/GetRemoteDiscription (darwin).

cloudwebrtc · cloudwebrtc · commit 2a9ec030a2ff · 2021-07-02T10:25:03.000+08:00
diff --git a/common/darwin/Classes/FlutterWebRTCPlugin.m b/common/darwin/Classes/FlutterWebRTCPlugin.m
@@ -574,8 +574,12 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult) result
         RTCPeerConnection *peerConnection = self.peerConnections[peerConnectionId];
         if(peerConnection) {
             RTCSessionDescription* sdp = peerConnection.localDescription;
-            NSString *type = [RTCSessionDescription stringForType:sdp.type];
-            result(@{@"sdp": sdp.sdp, @"type": type});
+            if(nil == sdp){
+                result(nil);
+            }else{
+                NSString *type = [RTCSessionDescription stringForType:sdp.type];
+                result(@{@"sdp": sdp.sdp, @"type": type});
+            }
         } else {
             result([FlutterError errorWithCode:[NSString stringWithFormat:@"%@Failed",call.method]
                                        message:[NSString stringWithFormat:@"Error: peerConnection not found!"]
@@ -587,8 +591,12 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult) result
         RTCPeerConnection *peerConnection = self.peerConnections[peerConnectionId];
         if(peerConnection) {
             RTCSessionDescription* sdp = peerConnection.remoteDescription;
-            NSString *type = [RTCSessionDescription stringForType:sdp.type];
-            result(@{@"sdp": sdp.sdp, @"type": type});
+            if(nil == sdp){
+                result(nil);
+            }else{
+                NSString *type = [RTCSessionDescription stringForType:sdp.type];
+                result(@{@"sdp": sdp.sdp, @"type": type});
+            }
         } else {
             result([FlutterError errorWithCode:[NSString stringWithFormat:@"%@Failed",call.method]
                                        message:[NSString stringWithFormat:@"Error: peerConnection not found!"]
