问题
I'm using XCode 6.2 and I have a project with several targets and with no tests.
I'm trying to include now XCTest for one of the targets. To do so, I add a new "Cocoa Touch Testing Bundle" and select the target that I want as a host.
When trying to launch the test with Cmd+U, the simulator launches, opens the app for some milliseconds and then it closes, launching this message:
IDEBundleInjection.c: Error 4 loading bundle '/Users/pepito/Library/Developer/Xcode/DerivedData/Flight-gpauuftblwwxtvevnylzllkypkjy/Build/Products/Debug-iphonesimulator/target Tests.xctest': The bundle “target Tests” couldn’t be loaded because its executable couldn’t be located.
When I check the folder specified there, there is a just the Info.plist file, but there is no executable.
I have tried adding a branch new app target, which added automatically tests for it. The same error happens there when trying to run the tests.
If I create tests for a target in a brand new XCode project, then it works fine.
回答1:
I got this error today because I forgot to add sources to the "Compile Sources" build phase in my test target.
回答2:
I finally managed to solve the problem. It was related to the compiler selected by default for the XCTest target. It had selected "Unsupported Compiler" and I changed to "Default compiler (Apple LLVM 6.1)" and it started working again.
回答3:
In my case, target's iOS Deployment Target in Build Settings was lower than target device's version. Hope that helps someone.
来源：https://stackoverflow.com/questions/29662266/xctest-the-bundle-target-tests-couldn-t-be-loaded-because-its-executable-coul