tvOS use of multi-layered images

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When the button or cell in Apple TV gets focus, there are some interesting shadow animations. This effect can be easily achieved through parallax images.

apple TV Human-Computer Interaction guide describes tvOS in the uiimage supports two proprietary stacked picture formats, LSR and LCR. The LSR is mainly used to directly put into the project resources, and LCR is mainly placed on the server, at run time on demand load. On the production of stacked images, Apple provides us with three ways to do this:

• A plugin for photoshop named "Parallaxexporter_apps". This plugin seems to support only Photoshop 2014 and Photoshop 2015.

• A separate "Parallax previewer" application allows you to create parallax images directly.

• The assets.xcassets of Xcode is created directly.

When making parallax images, what we need to do is to prepare a picture for each layer. You can refer to the Apple TV HMI guide for a dimension relationship between each layer of images, which you can refer to in the tvOS Programming Guide.

It is important to note that the LSR files that we make must be placed in the assets.xcassets. If you pull directly into a project like a normal picture, UIImage the imageNames: method does not load successfully.

Can load LSR files in Assets.xcassets//Cannot load other LSR files in mainbundle let image = UIImage (imagenamed: "Test")

LSR files in Assets.xcassets can be loaded//cannot load other LSR files in mainbundle UIImage *image = [UIImage imagenamed: @ "Test"];

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tvOS use of multi-layered images