ionic cordova resources should generate Default-2436h.png and Default-Landscape-2436h.png for iOS
In general it's best to try to generate all the expected launch images: https://github.com/apache/cordova-ios/blob/master/bin/templates/project/__PROJECT_NAME__/Images.xcassets/LaunchImage.launchimage/Contents.json
Original issues:
I'll post this here but if this is just a support question, then I apologize. In running ionic cordova resources ios I found cases depending on the base splash.png image that the command would not complete and not all images were created properly. Here are the details:
1) Created a new Ionic V4 project.
2) Ran ionic cordova resources ios using the default ionic splash.png image - this ran successfully.
3) Replaced splash.png with a new image, just a solid color background - this ran successfully.
4) Added text to this splash.png image and reran - this ran successfully.
5) Added a small image to this same splash image and reran - not all files were created successfully!!
Here is a screen shot of the splash image with the image added and one of the files that resulted.

Not sure what to try next. When this happens the command just sits idling w/out completing and w/out errors message.
ionic cordova resources ios
✔ Collecting resource configuration and source images - done!
✔ Filtering out image resources that do not need regeneration - done!
✔ Uploading source images to prepare for transformations: 2 / 2 complete - done!
â ™ Generating platform resources: 10 / 13 complete
@kinggolf The resources server is notoriously flakey. I just kicked it. Would you mind trying again? If it's generating the same images, try making a modification to the png and trying again.
@dwieeb Thanks. Just re-running still did work completely. I moved the photo of the muffin down in the overall splash.png image and it worked! I probably should be using LaunchStoryboard anyway. Appreciate the response.
Any update on this issue? Not having the iPhone-X splash screens causes issues with in-app-browser: https://github.com/apache/cordova-plugin-inappbrowser/issues/306
Would love to see a solution for this issue. I guess this has been around since iPhone X which was released over a year ago.
This was resolved by this PR: https://github.com/ionic-team/cordova-res/pull/26
Available in latest cordova-res.
npm i -g ionic@latestcordova-res: npm i -g cordova-res@latestionic cordova resources
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Would love to see a solution for this issue. I guess this has been around since iPhone X which was released over a year ago.