在9月18日开始更新了xcode最新版本后，大多数朋友也更新了，但是不幸的是有些朋友会遇到下面的问题
CodeSign /Users/Justinjing/Library/Developer/Xcode/DerivedData/PAChat-gmruiapdstkomzhdovxaqijjeyrt/Build/Products/Debug-iphoneos/GodTVPlay.app
cd /Users/Justinjing/Desktop/project/PAChat
export CODESIGN_ALLOCATE=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/codesign_allocate
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
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
看到这个日志好多朋友会头痛，因为大片的log，很迷茫，不用怕，其实也很简单，我们要抓住关键，
CGDBA25FC97FA851693DEEB23A01AD91B2D00526: no identity found
也就是找不到对于的profile文件，这个很纳闷我的keychian里面又com.Justinjing.*"的profile文件为什么还报错呢？
纳闷之下，我就用“iphone配置使用工具”打开了看了看发现了二个同样的com.Justinjing.*，
仔细一看一个是过期的，罪魁祸首找到了，
我就删除了过期的profile，然后重启xcode，bulid成功。