遇到问题:

Cannot create __weak reference in file using manual reference counting

所在文件:
NSObject+RACPropertySubscribing.h
RACKVOChannel.h

iOS-RAC: Cannot create __weak reference in file using manual reference counting_系统

解决办法:

Build Settings ->
Apple LLVM 8.1 - Language - Objective C ->
Weak Referances in Manual Retain Release -> Yes

iOS-RAC: Cannot create __weak reference in file using manual reference counting_系统_02