In iOS do we have something like Gradle Build Flavors on Android.
Basically I want to integrate Applause SDK with my app but I dont want that code to be part of the rel
There are several approaches you can take to build an iOS app in different flavors:
Different versions of a resource file
Use a custom build variable to switch between different versions of a resource file. This article discusses how to build an app with different icons.
For *.strings files and resources linked in *.storyboard files the suffixing approach suggested in the first item did not work for me. So I added a Run Script build phase early in the pipeline. Using a script you are free to do whatever you want before the usual build chain handles your files. This is great for dynamic file generation or advanced file selection logic. As a switch you can (again) use a custom build variable.
Modifiying code
Use a compiler flag as suggested here. These can be checked using the preprocessor.
Alternatively you can (again) check custom build variables. To make them accessible add them as a key in a plist file.
You can make use of Schemes and Build configurations in Xcode. Here's the official documentation: https://developer.apple.com/library/ios/recipes/xcode_help-project_editor/Articles/BasingBuildConfigurationsonConfigurationFiles.html
After you create a build configuration, you should edit your scheme to use that build configuration. For that click on your scheme and select Edit Scheme.
In short, the process is:
#ifdef APP_STORE
//do something
#endif