解决XCode8 日志 Protocol not available, dumping backtrace问题

一 问题描述

nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available, dumping backtrace:
        [x86_64] libnetcore-856.1.8
    0   libsystem_network.dylib             0x000000010b23380e __nw_create_backtrace_string + 123
    1   libnetwork.dylib                    0x000000010c032194 nw_socket_add_input_handler + 3002
    2   libnetwork.dylib                    0x000000010c00fdb8 nw_endpoint_flow_attach_protocols + 3768
    3   libnetwork.dylib                    0x000000010c00edd5 nw_endpoint_flow_setup_socket + 563
    4   libnetwork.dylib                    0x000000010c00db34 -[NWConcrete_nw_endpoint_flow startWithHandler:] + 2612
    5   libnetwork.dylib                    0x000000010c028d11 nw_endpoint_handler_path_change + 1261
    6   libnetwork.dylib                    0x000000010c028740 nw_endpoint_handler_start + 570
    7   libnetwork.dylib                    0x000000010c040003 nw_endpoint_resolver_start_next_child + 2240
    8   libdispatch.dylib                   0x000000

二 问题解决

1. 到 Edit Scheme (快捷键 command + shift + <)

2.选择 Arguments 选项 -> 环境变量

3.添加变量 OS_ACTIVITY_MODE = disable