如果出现问题：
The platform of the target `Pods` (iOS 4.3) is not compatible with `AFNetworking (2.0.3)` which has a minimum requirement of OS X 10.8 - iOS 6.0.
可以修改Podfile为：
platform :ios, '6.0'
使用CocoaPods
转载于:https://www.cnblogs.com/pandas/p/4238118.html