Ta的回复 ：Has anybody found a solution to this problem? I have been facing this issue. The funny thing is I use the same NSMutableURLRequest to call an api which works fine and i get response. But when when I call a different api on another server it doesn't work and I don't get any response. Hence these in my error logs: 2018-05-14 10:59:28.426097+0000 MyVoda[3570:476772] [BoringSSL] Function boringssl_session_errorlog: line 2871 [boringssl_session_read] SSL_ERROR_ZERO_RETURN(6): operation failed because the connection was cleanly shut down with a close_notify alert 2018-05-14 10:59:28.426259+0000 MyVoda[3570:476772] TIC Read Status [1:0x6040001768c0]: 1:57 2018-05-14 10:59:28.426609+0000 MyVoda[3570:476772] [BoringSSL] Function boringssl_session_errorlog: line 2871 [boringssl_session_read] SSL_ERROR_ZERO_RETURN(6): operation failed because the connection was cleanly shut down with a close_notify alert 2018-05-14 10:59:28.426840+0000 MyVoda[3570:476772] Task <EBAE4678-4757-4C39-9556-69B335D81965>.<1> HTTP load failed (error code: -1005 [4:-4]) 2018-05-14 10:59:28.427053+0000 MyVoda[3570:476054] Task <EBAE4678-4757-4C39-9556-69B335D81965>.<1> finished with error - code: -1005 error is Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." UserInfo={NSUnderlyingError=0x60400024ca80 {Error Domain=kCFErrorDomainCFNetwork Code=-1005 "(null)" UserInfo={NSErrorPeerAddressKey=<CFData 0x608000099230 [0x110c31bb0]>{length = 16, capacity = 16, bytes = 0x100201bb5057462e0000000000000000}, _kCFStreamErrorCodeKey=-4, _kCFStreamErrorDomainKey=4}}, NSErrorFailingURLStringKey="myapi" NSErrorFailingURLKey="myapi", _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-4, NSLocalizedDescription=The network connection was lost.}. Can any body help?