iOS app testing. App installation failed. No code signature found

In my case, I have created an unsigned IPA file and for this i had made some changes in SDKSetting.plist file (changed CODE_SIGNING_REQUIRED = NO) and it should be always YES if you are running application on the device.

To resolve this follow the below steps: Steps to create unsigned IPA (Tested on Xcode 9.4.1)

Step 1: Open finder > Go to Folder.. as below screen

and then copy and past the below line:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.*.sdk/SDKSettings.plist

Open iPhoneOS.sdk as showing in below image:

Step 2: Copy the SDKSettings plist in another folder because you can't make changes here:

Step 3: Make the change in duplicate

set CODE_SIGNING_REQUIRED to YES

Step 4: Now replace duplicate Plist with the original one (Both names must be the same). This will also ask admin permission to change.

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If you will update your Xcode then the problem will also disappear because updated xcode will come with default SDKSetting.plist

If "code sign on copy" fails, then check if you are modifying the frameworks in a run script after the "Embed Frameworks" phase.

If you are, then move the Run script to a position before the "Embed Frameworks" phase.

I had this problem, this is what I did to resolve it:

• Run "clean" in Xcode
• Close Xcode
• Remove all data in ~/Library/Developer/Xcode/DerivedData
• Remove all xcuserdata folders in your project (check in your xcodeproj and project.xcworkspace directories)

Only if you have Cocoapods in your project:

• Run pod deintegrate.
• Remove your .xcworkspace if it was created by CocoaPods.
• Run pod install or pod update

Now you can open your fresh Xcode.

Hope this help you.

In my case the problem was created by adding a new cocoa touch framework.

In my case, the problem was unsigned frameworks.

Xcode 11 or above:

Go to Build Phases, expand Embedded Frameworks and select all Code Sign on Copy checkboxes.

Xcode 10 or earlier:

Build Phases > Copy Files > Code Sign on Copy (select all checkboxes)