经过了上次实习的洗礼，如今面对各种报错已经心平气和了很多。整理了一下今天下午因为换证书报出的三个错误。
报错一：
Signing Identity: "iPhone Developer: Justinjing (6ZM8N7CJE9)"
Provisioning Profile: "iOS Team Provisioning Profile: com.Justinjing.*"
(1bea6a7e-8631-486e-889e-4b062337ae5e)
/usr/bin/codesign --force --sign CGDBA25FC97FA851693DEEB23A01AD91B2D00526 --resource-rules=/Users/justinjing/Library/Developer/Xcode/DerivedData/PAChat-gmruiapdstkomzhdovxaqijjeyrt/Build/Products/Debug-iphoneos/PAChat.app/ResourceRules.plist --entitlements /Users/leeping/Library/Developer/Xcode/DerivedData/PAChat-gmruiapdstkomzhdovxaqijjeyrt/Build/Intermediates/PAChat.build/Debug-iphoneos/PAChat.build/PAChat.app.xcent /Users/justinjing/Library/Developer/Xcode/DerivedData/PAChat-gmruiapdstkomzhdovxaqijjeyrt/Build/Products/Debug-iphoneos/PAChat.app
CGDBA25FC97FA851693DEEB23A01AD91B2D00526: no identity found
Command /usr/bin/codesign failed with exit code 1
解决：
查看Xcode下当前用的profile名字，如图：
去到目录 Users ▸ username ▸ Library▸ MobileDevice ▸ Provisioning Profiles
找到改文件并删除，重新编译运行即可成功。
报错二：
解决：
iPhone上已经装了包标识符一样的 App，删掉再运行。
报错三：
"An App ID with Identifier 'com.example.app.extention' is not available. Please enter a different string."
解决：
