IOS xcode 8 have 2 library appear in red
<p>Hi I have an IOS project which has 2 library missing (appear in red, can not show in Finder) the project still build successfull but when I delete 2 libs, The build will stop.</p>

<p>Any what is this 2 libs any can we safety delete them? </p>

<p><a href="https://i.stack.imgur.com/vs7sj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vs7sj.png" alt="enter image description here"></a></p>