出现error的过程：在执行另外一个xcode项目重置了code sign。回到原来的项目的时候出现这个error
修复方法：
targe－build settings－code signing identity－choose iOS Developer
然后Provision File选择相应的file
參考链接：
https://developer.apple.com/legacy/library/documentation/ToolsLanguages/Conceptual/YourFirstAppStoreSubmission/ProvisionYourDevicesforDevelopment/ProvisionYourDevicesforDevelopment.html
