解决方案：Targets->Build Settings->Combined(All)搜索ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES,选中
选项，按下电脑的delete键，立即恢复为正常模式。
> Pod installation complete! There are 5 dependencies from the Podfile and 29 total pods installed. [!] The `BITBluetoothUpdateManager [Debug]` target overrides the `ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES` build setting defined in `Pods/Target Support Files/Pods-BITBluetoothUpdateManager/Pods-BITBluetoothUpdateManager.debug.xcconfig'. This can lead to problems with the CocoaPods installation - Use the `$(inherited)` flag, or - Remove the build settings from the target. [!] The `BITBluetoothUpdateManager [Release]` target overrides the `ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES` build setting defined in `Pods/Target Support Files/Pods-BITBluetoothUpdateManager/Pods-BITBluetoothUpdateManager.release.xcconfig'. This can lead to problems with the CocoaPods installation - Use the `$(inherited)` flag, or - Remove the build settings from the target. w1:BITBluetoothUpdateManager jiaguoshang$ pod update --verbose --no-repo-update
