process was already running or is hung in the debugger

[问题描述:]

编译无法上真机
错误提示
Couldn't register XXX(授权文件名称) with the bootstrap server. Error: unknown error code.
This generally means that another instance of this process was already running or is hung in the debugger.

[解决办法]
重启iphone

[导致问题的原因]
错误的插拔数据线,在debug联机状态,没有停止debug而直接拔掉数据线.