On iOS images can be loaded from Internet or File.

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/

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

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

Remark: on iOS bothImageService.Instance.LoadFileFromApplicationBundle andImageService.Instance.CompiledResource have the same effect asImageService.Instance.LoadFile.

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)=>{returnSomeMethodWhichReturnsStream(token);}).Into(_imageView);

WebP is supported on iOS usingWebP.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.