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For example, achievement images in Game Center are parallax images. Create and export.lsr files using Xcode or the Parallax Previewer app. Creating LSR Images with the Parallax Previewer App. Download the previewer app to create and preview.lsr images. Figure 7-1 shows the Parallax Previewer app. It has the following sections. Hello everyone, I need to be be able to use 'Parallax Previewer' an Apple developper app in order to view layered images using Apple Proprietary LSR format, on a macOS Yosemite. ScrollMe is a multipurpose theme and is perfect for business, web agency, personal blog, portfolio, photography, magazine, parallax one page and freelancer. ScrollMe has powerful features and provides a easier way to configure the front page with live preview from a customizer panel. Algomystic The Parallax view App is the Live Wallpaper App; Available for both Android & iOS smartphones this Allows you to change your phone’s normal Vanilla wallpaper to interesting Parallax live wallpaper. In simple words, you can say that it is the 3D live wallpaper app that offers a 3D tunnel effect to your phone’s Home Screen.

Creating Layered Images

Layered images are required for app icons and optional for other focusable UI elements. If your interface uses UIKit views and the focus API, UI elements that specify the appropriate layers automatically get the parallax effect treatment when they’re in focus. Focusable UI elements should contain a layered image.

Important

You must supply a layered image with a minimum of two layers for your app icon.

At runtime, UIKit understands two different formats that include layered effects. It can read layered images either from asset catalogs or a new layered image file format (.lsr). These formats are supported throughout the system in places where other image formats are supported. For example, achievement images in Game Center are parallax images. Create and export .lsr files using Xcode or the Parallax Previewer app.

Creating LSR Images with the Parallax Previewer App

Download the previewer app to create and preview .lsr images. Figure 7-1 shows the Parallax Previewer app. It has the following sections:

Layered image area. Contains each layer that makes up the image.
Viewing area. Combines and displays the layers.
View size. Changes the size of the image for viewing purposes only.
Position area. Adjusts the position of the selected image layer.
Plus and minus icons. Adds or deletes an image layer.
Size area. Adjusts the size of the selected image layer.
Play button. Animates the image to show the parallax effect.
Apple TV icon checkbox. Check to add the Apple TV icon shadow effect.
Background. Click to change the background for the viewing area.

To create an .lsr image:

Import a separate .png or .jpeg file for each layer in the image.
Adjust the size and positioning of the layers as appropriate.
Click File -> Export -> LSR to create a new LSR file.

Creating LSR Images Within Xcode

In Xcode, drag existing .png files into your app’s asset catalog to create an image stack. Each .png file represents a different layer for a layered image. To export a layered image in .lsr format, click the Export button in the upper right corner of the Xcode window. Figure 7-2 shows an app icon image.

You can also drag existing .lsr files directly into your asset catalog and they will be included in your app bundle. When the project is compiled, the image stacks and .lsr images in your asset catalogs are transformed into the .car file format and bundled with your app.

Creating an LCR Image

Xcode uses .lsr files or asset catalogs to specify layered image files. These files are processed and included in the app bundle. If you want to load an arbitrary file that is not stored in the app bundle (or on-demand resources), then you need to process it manually into an .lcr file. Use the layerutil command-line tool included with Xcode to create .lcr images. The layerutil tool converts .lsr files into .lcr files.

Open the Terminal and use the following command to create a new .lcr image.

xcrun —-sdk appletvos layerutil —-c <filename.lsr>

The resulting .lcr image will have the same name as the LSR file. You can use the —-o <new_filename.lcr> option to create an .lcr file with a different basename.

Incorporating Layered Images

To incorporate layered images in your app:

Create a UIImage object.
You load the image differently depending on whether the image is included in your app bundle or whether you have downloaded the image.
1. Bundle—Load images using imageNamed:.
2. Downloaded file—Load images using imageWithContentsOfFile:.
Create a new UIImageView object using the loaded images.
If the UIImageView is part of another view, set adjustsImageWhenAncestorFocused to YEStrue on the UIImageView.

When the view comes into focus, the layered images will display correctly.

Parallax Scroll is a fancy design concept in modern app design to create an interactive ‘Parallax’ effect on mobile or desktop apps.

Here is a list of 10 best Parallax Scroll components for React and React Native apps that let you make an element (typically background images) scroll at a different speed than the document as you scroll the web app or swipe through the mobile app. Have fun with it.

Originally Published Dec 19 2017, updated Jan 22 2021

Best React Parallax Components:

1. react-simple-parallax

A simple React Component for the parallax effect on the front layer.

2. React Scroll Parallax Component

React components to create parallax scroll effects for banners, images or any other DOM elements.

3. Parallax Scroll Effect For Images & Backgrounds – react-parallax

A highly customizable React parallax library to apply smooth parallax scroll effects on images or backgrounds.

4. React Parallax Component – PLX

Lightweight and powerful React component, for creating on scroll effects aka. parallax.

5. React Springy Parallax Component

A springy, composable parallax-scroller for React.

Best React Native Parallax Components:

1. Sticky Parallax Header For React Native

A simple React Native library to create a sticky, parallax scrolling, fully customizable header for your iOS and Android apps.

2. React Native Parallax FlatList Component

A drop in replacement for FlatList that allows for a Parallax effect on images.

3. react-native-parallax-scrollview

A ScrollView Component For React Native that comes with a parallax scrolling effect when swiping.

4. React Native Parallax Scroll Component

A ScrollView-like component that has a parallax background, a parallax foreground and a fixed or sticky header. Can be nested within other views. Works on iOS and Android.

5. ScrollView-Like React Native Component With Parallax Support