你好，我在真机上运行多条用例，每次运行十几条用例之后就会出现连接超时，看 xcode 里面显示获取不到真机活动列表，以前完全没接触过 ios 测试，大佬帮忙看看呢，是哪里的问题呀，怎么解决呀
用例报错信息：
requests.exceptions.ReadTimeout: HTTPConnectionPool(host='localhost', port=8100): Read timed out. (read timeout=60.0)
xcode 信息：
t = 7350.54s App event loop idle notification not received, will attempt to continue.
t = 7350.54s App animations complete notification not received, will attempt to continue.
2020-04-16 17:37:03.908945+0800 WebDriverAgentRunner-Runner[6400:1970311] Enqueue Failure: Failed to get system application: Timed out while fetching attributes 'XC_kAXXCAttributeSystemAppApplication' for Device system-wide element. WebDriverAgentRunner/UITestingUITests.m 38 1
2020-04-16 17:38:08.913791+0800 WebDriverAgentRunner-Runner[6400:1970311] Enqueue Failure: Failed to get list of active applications: Timed out while fetching attributes 'XC_kAXXCAttributeFocusedApplications' for (null). WebDriverAgentRunner/UITestingUITests.m 38 1