ios 自有证书打包失败

急，我用自有证书打包ios app，显示这个错误，该怎么办？

xcode build 开始

xcodebuild -sdk iphoneos8.1 -project 安装包制作目录Pandora.xcodeproj TARGETED_DEVICE_FAMILY="1,2"
Build settings from command line:
SDKROOT = iphoneos8.1
TARGETED_DEVICE_FAMILY = 1,2

=== BUILD TARGET Pandora OF PROJECT Pandora WITH THE DEFAULT CONFIGURATION (Release) ===

Check dependencies
Code Sign error: No codesigning identities found: No codesigning identities (i.e. certificate and private key pairs) that match the provisioning profile specified in your build settings (“forElearning”) were found.
CodeSign error: code signing is required for product type 'Application' in SDK 'iOS 8.1'

BUILD FAILED

The following build commands failed:
Check dependencies
(1 failure)