出现Unable to satisfy the following requirements:

之前正常运行的项目今天打开运行出现库引用失败的问题，于是便pod insatll，但是又是各种下列问题，写上SDK的版本好也不好用。
✗ pod install

Analyzing dependencies
[!] The version of CocoaPods used to generate the lockfile (1.1.0.beta.1) is higher than the version of the current executable (1.0.1). Incompatibility issues may arise.
[!] Unable to satisfy the following requirements:

  • AFNetworking required by Podfile
  • AFNetworking (= 3.1.0) required by Podfile.lock

Specs satisfying the AFNetworking, AFNetworking (= 3.1.0) dependency were found, but they required a higher minimum deployment target.

于是乎便Google出了这个http://blog.csdn.net/l2i2j2/article/details/51184386
按此修改后，再pod install就好了

图片说明
添加上platform :ios, '8.0'，重新安装即解决问题