[__NSSingleEntryDictionaryI length]: unrecognized selector sent to instance 0x281de6360 ??

[bhoomesh950]

+ (NSDictionary *)dictionaryWithJSONString:(NSString *)jsonString { NSParameterAssert(jsonString.length > 0); NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding]; NSError *error = nil; NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error]; if (error) { NSLog(@"Error parsing JSON: %@", error.localizedDescription); } return dict; }
Printing description of jsonString:
{
"{"type":"offer","sdp":"v" = "0\r\no=- 1422369165883867956 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE audio video\r\na=msid-semantic: WMS ARDAMS\r\nm=audio 9 UDP\/TLS\/RTP\/SAVPF 111 103 104 9 102 0 8 106 105 13 127 126\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:gjtPeCzKp2sH71Up\r\na=ice-pwd:FBQKDP6erBMkRr9yXZtzwum5\r\na=fingerprint:sha-256 FA:74:DF:85:15:11:71:DA:60:9C:6D:61:AF:31:35:9D:1A:49:F8:6A:81:64:86:DC:8F:23:44:8A:8D:C4:0E:FE\r\na=setup:actpass\r\na=mid:audio\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=extmap:3 http:\/\/www.webrtc.org\/experiments\/rtp-hdrext\/abs-send-time\r\na=sendrecv\r\na=rtcp-mux\r\na=rtpmap:111 opus\/48000\/2\r\na=fmtp:111 minptime=10; useinbandfec=1\r\na=rtpmap:103 ISAC\/16000\r\na=rtpmap:104 ISAC\/32000\r\na=rtpmap:9 G722\/8000\r\na=rtpmap:102 ILBC\/8000\r\na=rtpmap:0 PCMU\/8000\r\na=rtpmap:8 PCMA\/8000\r\na=rtpmap:106 CN\/32000\r\na=rtpmap:105 CN\/16000\r\na=rtpmap:13 CN\/8000\r\na=rtpmap:127 red\/8000\r\na=rtpmap:126 telephone-event\/8000\r\na=maxptime:60\r\na=ssrc:3467745781 cname:nLI l9g0p5WZuYh0\r\na=ssrc:3467745781 msid:ARDAMS ARDAMSa0\r\na=ssrc:3467745781 mslabel:ARDAMS\r\na=ssrc:3467745781 label:ARDAMSa0\r\nm=video 9 UDP\/TLS\/RTP\/SAVPF 100 101 116 117 96\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:gjtPeCzKp2sH71Up\r\na=ice-pwd:FBQKDP6erBMkRr9yXZtzwum5\r\na=fingerprint:sha-256 FA:74:DF:85:15:11:71:DA:60:9C:6D:61:AF:31:35:9D:1A:49:F8:6A:81:64:86:DC:8F:23:44:8A:8D:C4:0E:FE\r\na=setup:actpass\r\na=mid:video\r\na=extmap:2 urn:ietf:params:rtp-hdrext:toffset\r\na=extmap:3 http:\/\/www.webrtc.org\/experiments\/rtp-hdrext\/abs-send-time\r\na=extmap:4 urn:3gpp:video-orientation\r\na=sendrecv\r\na=rtcp-mux\r\na=rtpmap:100 VP8\/90000\r\na=rtcp-fb:100 ccm fir\r\na=rtcp-fb:100 nack\r\na=rtcp-fb:100 nack pli\r\na=rtcp-fb:100 goog-remb\r\na=rtcp-fb:100 transport-cc\r\na=rtpmap:101 VP9\/90000\r\na=rtcp-fb:101 ccm fir\r\na=rtcp-fb:101 nack\r\na=rtcp-fb:101 nack pli\r\na=rtcp-fb:101 goog-remb\r\na=rtcp-fb:101 transport-cc\r\na=rtpmap:116 red\/90000\r\na=rtpmap:117 ulpfec\/90000\r\na=rtpmap:96 rtx\/90000\r\na=fmtp:96 apt=100\r\na=ssrc-group:FID 1931635208 1598797712\r\na=ssrc:1931635208 cname:nLI l9g0p5WZuYh0\r\na=ssrc:1931635208 msid:ARDAMS ARDAMSv0\r\na=ssrc:1931635208 mslabel:ARDAMS\r\na=ssrc:1931635208 label:ARDAMSv0\r\na=ssrc:1598797712 cname:nLI l9g0p5WZuYh0\r\na=ssrc:1598797712 msid:ARDAMS ARDAMSv0\r\na=ssrc:1598797712 mslabel:ARDAMS\r\na=ssrc:1598797712 label:ARDAMSv0\r\n"}";
}

connection iphone to iphone problem