The version of CocoaPods used to generate the lockfile is higher than the version of

执行pod install时，提示如下信息：

The version of CocoaPods used to generate the lockfile (1.2.0.beta.1) is higher than the version of the current executable (1.1.1). Incompatibility issues may arise

解决方法：

执行：pod repo update 命令更新资源库即可。