Posts in Category "Launch Images"

Launch Images on iOS with Adobe AIR


To make an impression of a super-quick response and to give the application suitable time to load completely, iOS introduced the concept of a launch image. A launch image is the first interaction of an application with the user; so it becomes vital to have a properly displayed image at start up. The launch image is displayed while the application is loading, and as per iOS human interface guidelines, it’s one of the must-have requirements for an application.

For Adobe AIR applications, a launch image must remain visible until the AIR runtime is completely initialized. To accomplish this, AIR runtime displays the same launch image as displayed by iOS until the application is ready for use.

To support an application on all iOS devices, one should include launch images of various sizes and resolutions as per the following naming scheme.

Naming scheme

Basename + screen size modifier + orientation + scale + device + .png

Basename is the name specified in UILaunchImageFile key in the InfoAdditions element in the application descriptor. Usually it is given as the value, Default.

Screen size modifier when multiplied by the scale factor of the device, gives the actual dimensions of the device.  For example, screen modifier for iPhone 5s is 568h, which, when multiplied by scale factor of 2 gives 1136h – the actual height of iPhone 5s in pixels.

Orientation– different launch images can be displayed on an iPad and iPhone 6 plus, based on their orientation, at the time of application launch.

Scale factor for non-retina display devices is 1x and for retina devices it is 2x. The recently launched iPhone 6 plus has a scale factor of 3x.

Device portion is provided in applications that can run on both iPhone and iPad. Its value can either be ~iphone or ~ipad.

With the introduction of the new iPhone 6 and iPhone 6 plus in the market, there has not been enough clarity about all the images that need to be included while packaging applications for iPhone 6 and iPhone 6 plus. The following table lists combination of launch images that can be provided to have a properly working application.


Devices Resolution  (pixels) Launch image name Orientation


640×960 Default~iphone.png Portrait
iPhone 4,4s 640×960 Default@2x~iphone.png Portrait
iPhone 5,5c,5s 640×1136 Default-568h@2x~iphone.png Portrait
iPhone 6 750×1334 Default-375w-667h@2x~iphone.png Portrait
iPhone 6+ 1242×2208 Default-414w-736h@3x~iphone.png Portrait
iPhone 6+ 2208×1242 Default-Landscape-414w-736h@3x~iphone.png Landscape


iPad 1,2 768×1024 Default-Portrait~ipad.png Portrait
iPad 1,2 768×1024 Default-PortraitUpsideDown~ipad.png Upside down portrait
iPad 1,2 1024×768 Default-Landscape~ipad.png Left landscape
iPad 1,2 1024×768 Default-LandscapeRight~ipad.png Right landscape
iPad 3,Air 1536×2048 Default-Portrait@2x~ipad.png Portrait
iPad 3,Air 1536×2048 Default-PortraitUpsideDown@2x~ipad.png Upside down portrait
iPad 3,Air 2048×1536 Default-LandscapeLeft@2x~ipad.png Left landscape
iPad 3,Air 2048×1536 Default-LandscapeRight@2x~ipad.png Right landscape

Number of images to include may vary according to the application requirement. If an application is built only for an iPhone, then iPad images can be skipped and vice versa.

On iPhone 6 and iPhone 6 plus, newly introduced display modes (Standard and Zoomed) makes the situation a bit tricky. In Standard mode, both devices display launch image as per the table shown above. In zoomed mode, however, the launch image of its predecessor device is displayed, which means on iPhone 6 plus, image meant for iPhone 6 i.e. Default-375w-667h@2x~iphone.png is displayed, likewise  on iPhone 6 launch image of iPhone 5 is displayed.

Launch Images


How to package launch images:

To include launch images in your application, all launch images are required to be placed at the top-most level or base location of your project hierarchy. For example if the base location is the src folder, then all launch images should be placed as shown in the following screenshot.

Demo Project

Project hierarchy


However, if you wish to package your iOS application using the command line then launch images can be added as assets in packaging command. For example, to package a Demo app with all iPhone launch images then the same can be done using the following command.

adt -package -target <target> -provisioning-profile <Profile> -storetype pkcs12 -keystore <Certificates.p12> -storepass <password> Demo.ipa Demo-app.xml Demo.swf  Default~iphone.png Default@2x~iphone.png Default-568h@2x~iphone.png Default-375w-667h@2x~iphone.png Default-414w-736h@3x~iphone.png Default-Landscape-414w-736h@3x~iphone.png

Known Issues:

Currently the following known issues exist with launch images in Adobe AIR SDK version

  1. 3945071 : [iPhone 6 +] An inverted launch image is displayed for a split second when the device is kept at rotated right Landscape orientation (Aspect Ratio is landscape and Auto Orients is false).
  2. 3945046 : [iPhone 6 +] An inverted launch image is displayed, if the device is kept in upside-down position and (Auto orient is true and Aspect ratio landscape).
  3. 3945056 : [iPhone 6 +] If a landscape image is not provided for iPhone 6 +, Stretched Portrait launch image is displayed when application is launched in landscape mode.

For more information on iOS Launch image you can refer to Apple’s iOS Human Interface Guidelines.

Launch Images for AIR Applications on iOS

Apple expects all its iOS applications to have launch images for all supported devices and resolutions to enhance the user experience at application launch.  In general, an iPhone application should have a Portrait launch image and an iPad application should have a launch image as per the launch orientation of the application. As mentioned here, every application must include launch image for different sizes and resolution. Looking at the sizes closely, we notice that Apple expects fullscreen launch images for iPhone whereas it expects non fullscreen launch images for iPad. This size recommendation by Apple is irrespective of the fact whether the application is meant to be fullscreen or not. Continue reading…