UE4 signing key not found

1、Project Setting -> IOS -> automatic signing 勾上。

2、删除Provision文件：

Windows：C:\Users\>\AppData\Local\Apple Computer\MobileDevice\Provisioning Profiles

Mac ： ~/Library/MobileDevice/Provisioning Profiles

进入Mac方法：Open finder on your mac, and click on Go -> Go to Folder ... Just paste this paste into the search bar and hit Open. It will show the list of provisioning profiles present in Xcode. Delete all provisioning profiles.

3、删除证书：

Windows：To be more specific: It's opening windows command line (Win+R), input "certmgr.msc". At least it works on win10. the certifications located in "Certificates->Personal->Certificates" in certmgr panel

Mac：keychin直接删除