用icon composer製作的新版圖標檔案能套用至ios18以下嗎？要怎麼同時兼容適配ios18 ios17 ios16 ios26的圖標呢？

Icon Composer, introduced in Xcode 26, allows you to create icons that are compatible across multiple iOS versions, including iOS 18, iOS 17, and iOS 16. The tool is designed to streamline the process of creating icons that adapt to different platforms and appearance modes, such as dark and tinted modes. This means you can create a single icon file that works across various iOS versions and platforms.

To ensure compatibility with different iOS versions, you should:

1. Use vector-based design tools to create scalable graphics.
2. Export your design layers and import them into Icon Composer.
3. Utilize the app's features to adjust for different appearance modes and platforms.
4. Save the icon file and integrate it into your Xcode project.

For more detailed guidance on using Icon Composer, you can refer to the session Create icons with Icon Composer (00:00:00).