Launch screen on iPad

Question

I have an iPhone app. When I run it on the iPad everything looks great (but small) except for the launch screen that also is small (not full screen) and not really proportional.

I have read the documentation, but I'm not sure where I've gone wrong. I have added Default-Portrait.png and Default-Landscape.png, but it doesn't change anything.

I don't really mind about how it is, more than I don't want it to be rejected in App Store because of that.

Edit: My info.plist (if you see other weird things, please let me know. I'm submitting today)

<key>CFBundleDevelopmentRegion</key>
<string>en</string>
<key>CFBundleDisplayName</key>
<string>${PRODUCT_NAME}</string>
<key>CFBundleDocumentTypes</key>
<array/>
<key>CFBundleExecutable</key>
<string>${EXECUTABLE_NAME}</string>
<key>CFBundleIconFile</key>
<string></string>
<key>CFBundleIconFiles</key>
<array>
    <string>Icon.png</string>
    <string>Icon@2x.png</string>
    <string>Icon-72.png</string>
    <string>Icon-Small-50.png</string>
    <string>Icon-Small.png</string>
    <string>Icon-Small@2x.png</string>
    <string>Icon-72.png</string>
    <string>Icon-72.png</string>
</array>
<key>CFBundleIdentifier</key>
<string>com.xx.xxx</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>${PRODUCT_NAME}</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLName</key>
        <string></string>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>fb1234</string>
        </array>
    </dict>
</array>
<key>CFBundleVersion</key>
<string>1.0</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>NSMainNibFile</key>
<string>MainWindow</string>
<key>SHKFacebookKey</key>
<string>1234</string>
<key>SHKFacebookSecret</key>
<string>1234</string>
<key>SHKMyAppName</key>
<string>xxx</string>
<key>SHKMyAppURL</key>
<string>http://itunes.apple.com/xxx</string>
<key>UIInterfaceOrientation</key>
<string>UIInterfaceOrientationPortrait</string>
<key>UIInterfaceOrientation~ipad</key>
<string>UIInterfaceOrientationPortrait</string>
<key>UIStatusBarHidden</key>
<true/>
<key>UISupportedInterfaceOrientations</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UTExportedTypeDeclarations</key>
<array/>
<key>UTImportedTypeDeclarations</key>
<array/>

Answer 1

Make sure to add these into your Info.plist file

<key>UISupportedInterfaceOrientations~ipad</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
</array>

Even of your orientations work properly without, it's absolutely imperative to have these to select a proper launch screen.

BTW You won't be rejected. It's just a matter of good programming ethics.