解决方法
Xcode控制台输出记录在系统日志中.您可以使用grep从控制台搜索系统日志：
# view last 2000 lines of the system log sudo tail -n2000 /private/var/log/system.log # search system log for YourApp sudo grep YourApp /private/var/log/system.log # watch the system log as it's being written and filter for YourApp sudo tail -f /private/var/log/system.log | grep YourApp