iOS 获取打印日志

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iOS 获取 这串日志 怎么获取 [SYS][DEBUG][2018-07-03 18:11:20.086][tool.c:679 GizWifiSDKSendJsonToClient][write to clientFd 14 in <coreDataCommon.c:7085 GizWifiSDKNotifyDeviceAttrStatusChanged> success, formatJsonStr: ]

{"cmd":2006,"mac":"5CCF7F36553C","did":"F8G***nt2","productKey":"969734669e8544f3aa4dfebe87f03ac5","attrStatus":{"enumData":{"Study_Code":{"value":1,"displayName":"传感器学习"}},"data":{"Heartbeat_value":"19"}}}

[SYS][DEBUG][2018-07-03 18:11:20.003][GizMessageQueue.m:621 GizMessageBlhndNVrNntzBMHH][recv data:]

{"cmd":1036,"sn":9,"errorCode":0}