nw_socket_set_common_sockopts X

nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available, dumping backtrace:
0 libsystem_network.dylib 0x000000010badf80e __nw_create_backtrace_string + 123

1 libnetwork.dylib 0x000000010c6e4194 nw_socket_add_input_handler + 3002

2 libnetwork.dylib 0x000000010c6c1db8 nw_endpoint_flow_attach_protocols + 3768

3 libnetwork.dylib 0x000000010c6c0dd5 nw_endpoint_flow_setup_socket + 563

4 libnetwork.dylib 0x000000010c6bfb34 -[NWConcrete_nw_endpoint_flow startWithHandler:] + 2612

5 libnetwork.dylib 0x000000010c6dad11 nw_endpoint_handler_path_change + 1261

6 libnetwork.dylib 0x000000010c6da740 nw_endpoint_handler_start + 570

7 libnetwork.dylib 0x000000010c6f2003 nw_endpoint_resolver_start_next_child + 2240

解决：
在xcode,进入菜单product-scheme-edit scheme 添加环境变量 OS_ACTIVITY_MODE 为 disable 即可，如下图

20161109214327_0.gif