问题
How can I see the output from the compiler of from the custom build steps (pre-action or post-action)?
回答1:
Pre-action output at least appears in system.log and is visible in Console.app.
回答2:
You'll find (and you can watch during the build) the complete build output in the Log Navigator. That's the right most icon of the small icons just below the Run and Build buttons.
回答3:
Per my answer here ( Is it normal for Xcode not to detect if a pre-action failed? ) this is an issue that's been discussed in the dev forums. Pre-/post-action script non-zero status doesn't seem to have an affect, nor does the output seem to make it into any logs.
回答4:
EDIT: as pointed out in the comment below this answer only works for Build phase scripts, not pre action and post action scripts.
In Xcode 8 you need need to select your latest build in "Navigator -> Report Navigator". In the main area you will be able to see the complete build log including your output.
Here is a simple "Hello world" echo
回答5:
So I figured out a way to both:
- Show output from pre-build scripts
- Stop the build script in the case of a build error
The basic concept is to send all output from the build event to various files, and then present that output as a part of a target build script (which does show it's output and can be exited or canceled).
Warning Hacks be near
Setup a build script that automagically handles pumping the output to 2 different files... 1 for the regular logs, and one for stderr. Or use mine (I posted on my blog because it seems stack overflow code detection sucks at shell scripts.)
Then you should call that script in the scheme prebuild phase like so:
"${PATH_TO_LOG_SCRIPT}/log_prebuild.sh" "${PATH_TO_PREBUILD_SCRIPT_TO_EXECUTE}/scriptToExecute.sh" 2> "${SOURCE_ROOT}/build/prebuild_error.log"
Then you need to setup a script in prior to the compile phase in the target build phases that checks for the presence of those files, dumps them to the logs, and interrupts the build if there was a failure. Or you could again use mine
Then build and cross your fingers :)
来源：https://stackoverflow.com/questions/5420068/how-to-display-compiler-output-or-custom-build-steps-output-when-building-with-x