What is the preprocessor macro to test whether an application extension is being built?

ios, ios-app-extension, ios8, preprocessor

Solution

You can define your own macro.

In the project settings use the dropdown in the topbar to select your extension target:

Then:

- Click `Build Settings`

- Find (or search) `Preprocessor Macros` under `Apple LLVM 6.0 - Preprocessing`

- Add `TARGET_IS_EXTENSION` or any other name of your choice in both the debug and release sections.

Then in your code:

#ifndef TARGET_IS_EXTENSION
    // Do your calls to UIApplication
#endif

Problem

This question is based purely on publicly released documents regarding the introduction of application extensions in iOS. With the introduction of app extensions in iOS 8, it is now possible to "extend custom functionality and content beyond your app and make it available to users while they’re using other apps". In my implementation of my extension, I am including some classes from my actual app in my extension (models, etc). The problem is that these classes make calls to `UIApplication`, which is not available in an app extension, and the compiler tells me so. I thought an easy solution to this would to be enclose any calls to `UIApplication` in an `#if` directive. For example, if I wanted to only include code if I was running on a simulator, I would use: ``` #if TARGET_IPHONE_SIMULATOR // Code Here #endif ``` Is there a similar defined macro when the target is an application extension?

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