Code Sign error: Certificate identity 'iPhone Developer: idf (XR9HN3TD7E)' appears more than once in the keychain. The codesign tool requires there only be one.
原因是证书，下载安装重复了，找到安装证书的位置，删除一个就ok了。
Code Sign Error: Provisioning Profile can't be found.
右键*.xcodeproj文件，显示包内容，texteditor打开project.pbxproj文件，搜索类似
PROVISIONING_PROFILE = "487F3EAC-05FB-4A2A-9EA0-31F1F35760EB";
"PROVISIONING_PROFILE[sdk=iphoneos*]" = "487F3EAC-05FB-4A2A-9EA0-31F1F35760EB";
CodeSign error: code signing is required for product type 'Application' in SDK 'iOS 5.1'
No unexpired provisioning profiles found that contain any of the keychain's signing certificates
Organizer->Devices->Provisioning Profiles 中的App Identifier的com及之后部分是否与TARGETS->Summary->iOS Application Target->Bundle Identifier 相符，特别是后面的项目名称