I followed the instruction of
platform :ios, '8.0'
pod 'Alamofire', '~> 3.0'
Updating local specs repositories
CocoaPods 1.0.0.beta.6 is available.
To update use: `gem install cocoapods --pre`
[!] This is a test version we'd love you to try.
For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.
Installing Alamofire (3.3.0)
Generating Pods project
Integrating client project
[!] Please close any current Xcode sessions and use `cocoapods-test.xcworkspace` for this project from now on.
Pod installation complete! There is 1 dependency from the Podfile and 1 total pod installed.
No such module 'Alamofire'
I was having this exact same problem. Please make sure that you are on Xcode 7.3 and using Swift 2.2.
You can check your Swift version using
xcrun swift -version. Updating Xcode to 7.3 should also automatically update Swift.
Updating Xcode resolved this issue for me.