http://blog.****.net/chenyufeng1991/article/details/48976639
错误：no symbols for paired Apple Watch
错误：No debugging symbols are available for the OS version installed on *** Watch.Verify that your internet connection is functional,then disconnect and reconnect the companion device to retry downloading symbols.
错误：Installing Symbols for watchOS 2.0
我的解决不是网络问题，而是要从网上下载的东西有问题：
参考了：http://blog.****.net/holydancer/article/details/9219333
iOS Provisioning Profiles 的配置无效了
要选择调试的设备为自己的手机。