The platform of the target `Pods` (iOS 4.3) is not compatible 错误

一：使用 cocoaPod错误

 The platform of the target `Pods` (iOS 4.3) is not compatible with `AFNetworking (1.3.2)` which has a minimum requirement of OS X 10.7 - iOS 5.0.

二：解决方案

    打开项目中 Podfile 文件   修改其 iOS平台为对应平台