[!] Pods written in Swift can only be integrated as frameworks; add `use_frameworks!` to your Podfile or target to opt into using it. The Swift Pod being used is: FBSnapshotTestCase

可能是要添加的这个库 不支持swift导致
解决办法：在podfile里面添加 use_frameworks！

platform :ios,'8.0'

pod 'Alamofire','~> 1.1'
pod 'Taplytics'
pod 'MBProgressHUD'
pod 'Atlas'
use_frameworks!
就是在加入你需要的那些库之后最后再加一句use_frameworks!