2020-07-28 11:12:40.252726+0800 野火通[3909:131440] Task <81849406-FE21-4174-A6A0-11A629710DFA>.<1> load failed with error Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLStringKey=http://172.28.3.77:80/fs/3/2020/07/28/10/PhPZPZbb-3-1595903962-N938EzKn_video_1595903954276.mp4, NSErrorFailingURLKey=http://172.28.3.77:80/fs/3/2020/07/28/10/PhPZPZbb-3-1595903962-N938EzKn_video_1595903954276.mp4, _NSURLErrorRelatedURLSessionTaskErrorKey=(

    "LocalDataTask <81849406-FE21-4174-A6A0-11A629710DFA>.<1>"

), _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <81849406-FE21-4174-A6A0-11A629710DFA>.<1>, NSLocalizedDescription=cancelled} [-999]

1.官方的iOS demo，现在IM、app、turn服务器修改为公司内部的服务器。