To use Objective-C in your YouTube project, you can follow these steps:

  1. Create a new project in Xcode: Open Xcode and select "Create a new Xcode project." Choose the "App" template and select "Single View App." Fill in the necessary details and choose Objective-C as the language.

  2. Set up the UI: In the storyboard file, you can design the user interface for your YouTube app. Add the necessary views, buttons, and labels to create the desired layout.

  3. Implement YouTube functionality: To integrate YouTube functionality into your app, you can use the YouTube Data API. This API allows you to search for videos, retrieve video details, and perform other YouTube-related tasks.

  4. Install the YouTube Data API SDK: You can install the YouTube Data API SDK using CocoaPods. Open Terminal and navigate to your project directory. Run the command pod init to create a Podfile. Open the Podfile and add the following line: pod 'GoogleAPIClientForREST/YouTube'. Save the file and run pod install to install the SDK.

  5. Set up API credentials: To use the YouTube Data API, you need to set up API credentials. Go to the Google Cloud Console, create a new project, enable the YouTube Data API, and generate API credentials (API key or OAuth client ID).

  6. Make API requests: In your Objective-C code, you can use the YouTube Data API SDK to make API requests. For example, you can use the GTLRYouTubeQuery_SearchList class to search for videos based on keywords. You can also use other classes provided by the SDK to perform various YouTube-related tasks.

Please note that this is a high-level overview of using Objective-C in a YouTube project. For more detailed instructions and code examples, you can refer to the official documentation and resources provided by YouTube and Google.