Xcode报错App Installation failed, No code signature found.

这个问题是最近在xcode 9.3上发现的

<^^>网上查了一下

1,打开终端 执行 

sudo chmod -R 777 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk 

2,然后打开/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/SDKSettings.plist,修改CODE_SIGNING_REQUIRED字段为YES。保存然后重启xcode 

(自己操作了一遍看了CODE_SIGNING_REQUIRED本来就是YES,我就重启了一下xcode,然后就没事了,哈哈,自己经验分享一下!)

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