Source

On iOS images can be loaded from Internet or File.

Internet

When the image is loaded from internet the image is cached on disk (by default 30 days but there is an optional TimeSpan so you can choose yours).

ImageService.Instance.LoadUrl(urlToImage).Into(_imageView);

On iOS9 you will need to configure ATS (App Transport Security) to load from non HTTPS websites: by default ATS prevents requests to non HTTPS website. This is easily configurable: http://ste.vn/2015/06/10/configuring-app-transport-security-ios-9-osx-10-11/

File

when you want to load the image from a file or application bundle:

ImageService.Instance.LoadFile(fullPathToImage).Into(_imageView);

Remark: on iOS both ImageService.Instance.LoadFileFromApplicationBundle and ImageService.Instance.CompiledResource have the same effect as ImageService.Instance.LoadFile.

Stream

The image can be loaded from an existing Stream. Pleas note: In this case the image is only cached in memory when custom key is provided. Please note that the Stream is automatically closed.

ImageService.Instance.LoadStream((token) => { return SomeMethodWhichReturnsStream(token); }).Into(_imageView);

WebP image format

WebP is supported on iOS using WebP.Touch (included as a Nuget dependency). WebP.Touch is a wrapper around official WebP lib from Google. Requested URL or requested file must end with .webp to be correctly decoded.