出错：OBJC_CLASS$_CMMotionManager", referenced from:
解决方案：需要添加coreMotion.framework
屏幕快照 2017-03-28 上午10.14.22.png出错： "_kVTCompressionPropertyKey_MaxKeyFrameInterval", referenced from:
AgoraRTC::H264VideoToolboxEncoder::ConfigureCompressionSession() in AgoraRtcEngineKit(libAgoraRTCEngine.a-arm64-master.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
解决方案：需要添加VideoToolbox.framework