Target 'AFNetworking' of project 'Pods' was rejected as an implicit dependency for 'libAFNetworking.a' because its architectures 'x86_64' didn't contain all required architectures 'i386 x86_64'

=== 筆記 ===
環境
Mac OS 10.10.5
XCode 7.1

iOS Project使用到AFNetworking, 透過CocoaPods安裝,
嘗試編譯時的出現警告：

現象

原因

pod install 的時候預設編譯的SDK變成OSX 

解決方法

選擇Pods專案>Build Settings>Base SDK 選擇 iOS