当用新的（1。2。2）替换旧的Parse框架（1.6.3）时，我得到了构建错误：
Undefined symbols for architecture armv7:
"_BFTaskMultipleExceptionsException", referenced from:
___53+[PFObject(Private) deleteAllAsync:withSessionToken:]_block_invoke226 in Parse(PFObject.o)
___65+[PFObject(Private) _deepSaveAsync:withCurrentUser:sessionToken:]_block_invoke319 in Parse(PFObject.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
我检查了推荐的库，我清理了项目并重新启动了XCode（v 6.1.1）
如何摆脱这个错误？