watchOS 不支持 WebSocket

哎。

1. apple watch上watchOS网络低级别和高级别区别，以及使用tcp/udp或者websocket的限制条件
2. WebSocket connect failed in WatchOS9 beta device, with error”unsatisfied (Path was denied by NECP policy”
3. Is it possible to use Web Sockets with Apple Watch? For example using Starscream
4. Why is Starscream not working anymore on real Apple Watch (WatchOS 6)?
5. Socket Connection doesn’t work on WatchOS 9

See documented Tech Note: TN3135

Only high-level networking is allowed for use in WatchOS, aside from a few low-level networking scenarios listed in the above Tech Note.

Low-level networking will typically always work in the simulator due to using your Mac’s networking capabilities. It also sometimes worked in WatchOS 6-8 due to a bug where restrictions on low-level networking were not working properly, which has been fixed in WatchOS 9.

请参阅技术说明：TN3135

WatchOS 仅允许使用高级网络，除上述技术说明中列出的少数低级网络场景外。

由于模拟器利用了 Mac 的网络功能，低级网络通常始终可以正常工作。在 WatchOS 6 至 8 中，由于低级网络限制存在一个漏洞（该漏洞已在 WatchOS 9 中修复），低级网络有时也可以正常工作。