iPad Pro launch image and App icon

Apple commented on this issue: "Latest beta (7.2b3) added 83.5@2x app icon slot to asset catalogs, and Developer relations reported in a radar comment that they no longer support launch images and will not be adding the iPad pro launch image size to asset catalogs."

Taken from here.

Use Launch Screen storyboard.

You can also disable Launch Screen File and Launch Images Source from project General settings and use the old way - define all Launch Images in Info.plist.

Info.plist:

<key>UILaunchImages</key><array>    <dict>        <key>UILaunchImageMinimumOSVersion</key>        <string>8.0</string>        <key>UILaunchImageName</key>        <string>DefaultPro-Landscape</string>        <key>UILaunchImageOrientation</key>        <string>Landscape</string>        <key>UILaunchImageSize</key>        <string>{1366, 1024}</string>    </dict>...</array> 

More info about UILaunchImages in Info.plist in this post:How do I create launch images for iPhone 6 / 6 Plus Landscape Only Apps?

You should use Launch Screen Files for iPad Pro instead of Launch Images.First, from iPad Pro, iOS don't support Launch Images, so you can not find the right sizes for iPad Pro's launch images in Xcode 7.1.Second, if you don't use Launch Screen File, you app running on iPad Pro will be scaled, which is so called 'Display Zoom'.