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Application Icons in Xamarin.iOS

The following topics will be covered in detail:

Application, Spotlight, and Settings Icons

In the same way that a Xamarin.iOS app can use image assets for UI controls and as document icons, image assets can be used to provide Application Icons. The following screenshots from an iPad illustrates the three uses of icons in iOS:

  • Application Icon - Every iOS app must define an application icon. This is the icon that the user will tap from the iOS home screen to launch the app. Additionally, this icon is used by Game Center, if applicable. Example:

    Application Icon

  • Spotlight Icon - Whenever the user enters the name of an app in a Spotlight Search, this icon is displayed. Example:

    Spotlight Icon

  • Settings Icon - If the user enters the Settings app on their iOS device, this icon will be displayed at the end of the Settings list for the app. Example:

    Settings Icon

The following image asset sizes and resolutions will be needed to support all of the icon types required by an Xamarin.iOS app targeting iOS 5 through iOS 9 (or greater):

iPhone Icon Sizes

  • iPhone: iOS 9 & 10 (iPhone 6 & 7 Plus)

    Icon 3x
    Application Icon 180x180
    Spotlight 120x120
    Settings 87x87
  • iPhone: iOS 7 & 8

    Icon 1x 2x
    Application Icon 60x601 120x120
    Spotlight 40x402 80x80
    Settings - -
  • iPhone: iOS 5 & 6

    Icon 1x 2x
    Application Icon 57x57 114x114
    Spotlight 29x29 58x58
    Settings 29x293, 4 58x583, 4

iPad Icon Sizes

  • iPad: iOS 9 & 10

    Icon 2x (iPad Pro)
    Application Icon 167x1676
    Spotlight 120x1206
    Settings 58x585
  • iPad: iOS 7 & 8

    Icon 1x 2x
    Application Icon 76x76 152x152
    Spotlight 40x40 80x80
    Settings - -
  • iPad: iOS 5 & 6

    Icon 1x 2x
    Application Icon 72x72 144x144
    Spotlight 50x50 100x100
    Settings 29x293, 5 58x583, 5
  1. Both Visual Studio for Mac and Xcode no longer support setting 1x image for iOS 7.
  2. Setting a 1x image for iOS 7 is not supported when using Asset Catalogs.
  3. iOS 7 & 8 use the same image sizes as iOS 5 & 6.
  4. Uses the same images and sizes as the Spotlight Icon.
  5. Uses the same size icons as the iPhone.
  6. Only supported with Asset Catalog Image Sets.

For more information about icons, please see Apple's Icon and Image Sizes documentation.

Managing Icons with Asset Catalogs

For icons, a special AppIcon image set can be added to the Assets.xcassets file in the app's project. All version of the image required to support all resolutions are included in the xcasset and grouped together. A special editor in Visual Studio for Mac allows the developer to include and setup these images graphically.

To use an Asset Catalog, follow these steps:

  1. Double-click the Info.plist file in the Solution Explorer to open it for editing.

  2. Scroll down to the iPhone Icons section.

  3. Click the Migrate to Asset Catalog button:

    Ensure AppIcon is selected

  4. From the Solution Explorer, double-click the Assets.xcassets file to open it for editing:

    The Assets.xcassets file in the Solution Explorer

  5. Select AppIcon from the list of assets to display the Icon Editor:

    The AppIcon editor

  6. Either click on given icon type and select an image file for the required type/size or drag in an image from a folder and drop it on the desired size.

  7. Click the Open button to include the image in the project and set it in the xcasset.

  8. Repeat for all images required.

This is the preferred method of including and managing image assets that will be used to provide Application, Spotlight and Settings icons for an app.

iTunes Artwork

If using the Ad-Hoc method of delivering the app (either for corporate users or for beta testing on real devices), the developer also needs to include a 512x512 and a 1024x1024 image that will be used to represent the app in iTunes.

To specify the iTunes Artwork, do the following:

  1. Double-click the Info.plist file in the Solution Explorer to open it for editing.

  2. Scroll to the iTunes Artwork section of the editor:

    Scroll to the iTunes Artwork section of the editor

  3. For any missing image, click on the thumbnail in the editor, select the image file for the desired iTunes artwork from the Open File dialog box and click the OK button.

  4. Repeat this step until all needed images have been specified for the app.