Platform-specific settings in Unity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What are platform-specific settings in Unity?

Platform-specific settings in Unity are options and configurations that allow your game to behave differently or optimize performance depending on the device or operating system it runs on, like Android, iOS, or Windows.

beginner

How do you access platform-specific settings in Unity Editor?

You open the Build Settings window (File > Build Settings), select the platform you want (like Android or iOS), then click on Player Settings to see and change platform-specific options.

beginner

Why is it important to use platform-specific settings?

Because different devices have different hardware and software capabilities, using platform-specific settings helps your game run smoothly and look good on each device by adjusting things like graphics quality, input methods, and permissions.

beginner

What is an example of a platform-specific setting in Unity?

An example is setting the default screen orientation differently for Android and iOS, like portrait mode for phones and landscape for tablets, so the game fits the device better.

intermediate

Can you write a simple Unity C# code snippet to check the platform at runtime?

Yes! You can use:

if (Application.platform == RuntimePlatform.Android) {
    Debug.Log("Running on Android");
} else if (Application.platform == RuntimePlatform.IPhonePlayer) {
    Debug.Log("Running on iOS");
}

Where do you find platform-specific settings in Unity?

A In the Scene view

B In the Player Settings under Build Settings

C In the Animation window

D In the Console window

Platform-specific settings are found in Player Settings, which you access through Build Settings.

Which Unity class helps detect the platform at runtime?

A BuildSettings

B PlatformManager

C RuntimeSettings

D Application

The Application class provides the platform property to detect the current platform.

Why might you set different graphics quality for different platforms?

A Because devices have different hardware capabilities

B To make the game harder

C To change the game story

D To change the player controls

Different devices have different hardware, so adjusting graphics quality helps performance.

Which of these is NOT a platform Unity supports for platform-specific settings?

A Photoshop

B iOS

C Android

D Windows

Photoshop is not a platform for Unity games.

What is the correct way to check if the game is running on iOS in Unity C#?

A if (Application.platform == RuntimePlatform.WindowsPlayer)

B if (Application.platform == RuntimePlatform.Android)

C if (Application.platform == RuntimePlatform.IPhonePlayer)

D if (Application.platform == RuntimePlatform.LinuxPlayer)

RuntimePlatform.IPhonePlayer is the correct enum value for iOS.

Explain what platform-specific settings are in Unity and why they matter.

Think about how games run differently on phones and computers.

Describe how to detect the current platform your Unity game is running on using code.

Look for a way to ask the game 'where am I running?'

Practice

1. What is the main purpose of using platform-specific settings in Unity?

easy

A. To disable all graphics features

B. To increase the game's file size

C. To make the game work well on different devices

D. To make the game run only on Windows

Solution

1. Step 1: Understand platform-specific settings

   Platform-specific settings allow customizing game behavior for different devices.

2. Step 2: Identify the main goal

   The goal is to ensure the game works well on all targeted platforms.

3. Final Answer:

   To make the game work well on different devices -> Option C

4. Quick Check:

   Platform-specific settings = device compatibility [OK]

Hint: Think about device compatibility and performance [OK]

Common Mistakes:

• Confusing platform-specific settings with increasing file size
• Assuming settings limit the game to one platform
• Believing settings disable features globally

2. Which of the following is the correct way to write platform-specific code for Android in Unity?

easy

A. #if UNITY_ANDROID
// Android code
#endif

B. #if ANDROID
// Android code
#endif

C. #if PLATFORM_ANDROID
// Android code
#endif

D. #if UNITY_MOBILE
// Android code
#endif

Solution

1. Step 1: Recall Unity platform symbols

   Unity uses symbols like UNITY_ANDROID for Android platform checks.

2. Step 2: Match the correct syntax

   #if UNITY_ANDROID is the correct directive for Android-specific code.

3. Final Answer:

   #if UNITY_ANDROID // Android code #endif -> Option A

4. Quick Check:

   Use UNITY_ANDROID for Android platform [OK]

Hint: Use UNITY_ prefix for platform symbols [OK]

Common Mistakes:

• Using incorrect symbols like ANDROID or PLATFORM_ANDROID
• Assuming UNITY_MOBILE covers Android specifically
• Missing #endif to close the directive

3. What will be the output when running this Unity C# code on iOS platform?

#if UNITY_IOS
Console.WriteLine("Running on iOS");
#else
Console.WriteLine("Running on other platform");
#endif

medium

A. Running on other platform

B. No output

C. Compilation error

D. Running on iOS

Solution

1. Step 1: Check platform directive

   The code uses #if UNITY_IOS, which is true on iOS platform.

2. Step 2: Determine executed code

   Since UNITY_IOS is defined, it prints "Running on iOS".

3. Final Answer:

   Running on iOS -> Option D

4. Quick Check:

   UNITY_IOS true prints iOS message [OK]

Hint: Match platform symbol with current device [OK]

Common Mistakes:

• Confusing UNITY_IOS with UNITY_IPHONE
• Expecting else block to run on iOS
• Thinking code causes compilation error

4. Identify the error in this Unity C# code snippet for platform-specific compilation:

#if UNITY_STANDALONE
Debug.Log("Standalone platform");
#else
Debug.Log("Other platform");

medium

A. Missing #endif to close the #if directive

B. Wrong platform symbol UNITY_STANDALONE

C. Debug.Log cannot be used in platform directives

D. No error, code is correct

Solution

1. Step 1: Check #if directive syntax

   The code starts with #if but does not have a matching #endif.

2. Step 2: Understand preprocessor rules

   Every #if must be closed with #endif to avoid compilation errors.

3. Final Answer:

   Missing #endif to close the #if directive -> Option A

4. Quick Check:

   #if must end with #endif [OK]

Hint: Always close #if with #endif [OK]

Common Mistakes:

• Assuming UNITY_STANDALONE is invalid
• Thinking Debug.Log is disallowed inside #if
• Ignoring missing #endif causes errors

5. You want to write code that runs only on Windows or macOS but not on mobile platforms. Which directive correctly achieves this in Unity?

hard

A. #if UNITY_STANDALONE
// code
#endif

B. #if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX
// code
#endif

C. #if UNITY_ANDROID || UNITY_IOS
// code
#endif

D. #if UNITY_MOBILE
// code
#endif

Solution

1. Step 1: Identify platforms to include

   Windows and macOS correspond to UNITY_STANDALONE_WIN and UNITY_STANDALONE_OSX.

2. Step 2: Combine platform symbols correctly

   Use logical OR (||) to include both platforms in one directive.

3. Final Answer:

   #if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX // code #endif -> Option B

4. Quick Check:

   Use || to combine Windows and macOS platforms [OK]

Hint: Use || to combine multiple platforms [OK]

Common Mistakes:

• Using UNITY_STANDALONE alone includes all standalone platforms
• Confusing mobile symbols with desktop platforms
• Using && instead of || for platform combination