Not able to identified actual issue, During updating coco pod getting a message "Re-creating CocoaPods due to major version update." (that was come only once) and pod updation is successful. After on build i am getting the error. Command /bin/sh failed with exit code 1. Below is some detail also which i am getting
Code Signing /Users/Gaurav/Library/Developer/Xcode/DerivedData/Appname-******/Build/Products/Debug-iphoneos/Appname.app/Frameworks/Alamofire.framework with Identity iPhone Developer: Account Name (Account Id)
/usr/bin/codesign --force --sign ***************** --preserve-metadata=identifier,entitlements "/Users/UserName/Library/Developer/Xcode/DerivedData/Appname-***************/Build/Products/Debug-iphoneos/Appname.app/Frameworks/Alamofire.framework"
/Users/Username/Library/Developer/Xcode/DerivedData/Appname-************/Build/Products/Debug-iphoneos/Appname.app/Frameworks/Alamofire.framework: bundle format unrecognized, invalid, or unsuitable
I'm using iOS 8 as deployment target and Xcode 7.3.1 I have checked code signing identity that doesn't have any issue. I have reinstall again all pod and Alamofire also but not abel to identified issue.
Clean the project, and deleting the derived data (~/Library/Developer/Xcode/DerivedData/) fixed it for me