Environment variables and arguments passed on launch are not working once I compile the app

Question

The thing is that I set some defaults before I run the app under specific target:

This is how I check if my target runs or not:

if NSProcessInfo.processInfo().arguments.contains("DIFF") {}

or

if NSProcessInfo.processInfo().environment["DIFF"] != nil {}

but they works only after I compile the app on device. Once I close the app, and run again from the icon app on device, it doesn't work any more. Why?

Craig Siemens · Accepted Answer · 2022-07-07 20:33:00Z

22

Those arguments are only passed to the app when it is launched by Xcode using your scheme. When the app is launched by the user tapping the the icon, the arguments will not be passed.

Documentation for Specify Launch Arguments and Environment Variables

edited Jul 7, 2022 at 20:33

answered Feb 18, 2016 at 22:12

Craig Siemens

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7 Comments

Bartłomiej Semańczyk Over a year ago

I need to make it working every time. What should I do then?

Craig Siemens Over a year ago

It depends on what your goal is. You could just remove your if statement if you want the code to always run.

Bartłomiej Semańczyk Over a year ago

No, I have two targets. This code need to be executed everytime FOR THAT TARGET, even when I run the app from the app icon.

Taku Over a year ago

@CleverError Is there a documentation or reference on this? -Thanks

Craig Siemens Over a year ago

@benrudhart I added a link to the documentation I could find.

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