The answer was found
on stackoverflow as follows, after making sure that your Base
SDK was set to the "Latest
iOS" you needed to Edit
Scheme [Product > Edit Scheme > Build> Destination (drop down list) > iPhone/iPad/Device]
Xcode 4: The selected run destination is not valid for this action
本文介绍了一个在iOS开发中常见的构建问题及其解决方案。当遇到构建失败时，确保将基础SDK设置为最新的iOS版本，并且在产品方案中正确配置了构建目标。
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