解决The version of CocoaPods used

执行pod install时，提示如下信息

The version of CocoaPods used to generate the lockfile (1.1.1) is higher than the version of the current executable (1.0.0). Incompatibility issues may arise.

这是因为当前CocoaPods版本低了

解决方法：

执行：pod repo update 命令更新资源库即可。