cocoapods添加库后报错 apple mach-o linker error

添加新库后老是报错误
Undefined symbols for architecture arm7:
  "_OBJC_CLASS_$_****", referenced from: someFile
ld: symbol(s) not found for architecture arm7

后来在Pods项目中设置了 Active Architecture Only    -->     NO
Set Architectures to armv7 armv7s, Build Active Architecture Only to NO, for every target in the project, including every one in Pods

编译通过

注意一点就是每次pod install 或者 pod update 后都要重新改一次，特别麻烦