How to add your own icon to a dockerhub image - dockerhub

When opening kitematic, you get a nice overview of recommended and popular Docker images, each of those with its own app icon, etc.
My question is, where you can set this "branding" properties in the dockerhub (icon and side color...)

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Xcode Asset Catalog not showing

I’m a new developer to Xcode and I’m trying to create my first app. However when I want to add to my asset catalog, I’m not finding the import button or when I drag and drop a image , it’s not going into a folder nor can I find a way to create a folder. I just have this blank empty space.
This is what a normal asset catalog looks like in YT tutorials:
This is what I get:
I tried looking into view, I’ve seen an Apple dev link that didn’t really help. It called for File>New> Asset catalog but it just creates this image icon as seen in my screenshot
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App Store rejects because of app icon size

Appstore rejects app upload and shows this error:
Invalid Image Path - No image found at the path referenced under key
'CFBundleIcons': 'AppIcon20x20'
Can anyone share what the issue is? I had implemented appicon using this.
Use https://makeappicon.com website to make app icons it will automatically generate app icons of all sizes required.
This is my first post on StackOverflow so bear with me.
I created this automator workflow, it generates all icon sizes needed for the App Store currently⟨sept 2022)
https://github.com/saxjax/app-icon-creator.git
1- Open in automator and save.
2- Create a squared image 1024x1024 or larger using preview.
3- right click on the image, select "To Icon"
follow the prompts.
The script consists of blocks of 4 for each icon size:
1-Get value
2-Duplicate
3-Scale
4-Rename
If you need a particular size, just copy paste that quadruple and change the pixel size and the name accordingly.
Feel free to manipulate and share the code however you like.
In the future from Xcode 14 and out you only need to provide one 1024x1024 icon in your assets catalog.

Its just impossible to add an action extension icon

I've been literally trying for two weeks to get an icon for an action extension to appear, but absolutely nothing works.
I've seen past questions such as this iOS 8 Action Extension icon sizes and this Why isn't my iOS8 Application Action Extension App Icon showing up? but they are of no use.
I've created an Xcode template project purely to try every combination of things mentioned in the other questions, still without avail.
1) The first thing that's mentioned is that the action extension should have its own asset catalog, ok here it is:
2) Secondly that it should contain an app icon image set, here that is:
3) Thirdly people say they had to add its target membership to the extension and to the app. Here that is too (in all of these things, I've tried variations such the membership being just the extension, just the app, both)
4) Fourthly, people mention they had to add it to the compile sources, here that is, as well as it being copied in the bundle resources:
5) Some say it also needs to be copied in the container app's bundle, here that is, and for good measure its been added as a compile resource of that too:
6) One person says it was necessary to add the container apps assets to the extension bundle, I can't see how that would work as the icons in the container app are colored and not matching the requirements of the extension icons, but what the hell, might as well try everything right, and while we're at it lets add assets everywhere:
7) The asset icon itself is important, colored icons are not displayed, but I tried it anyway. A simple black and white image is described as the white parts appearing as grey but I've tried that anyway. Trying unsupported icons was just desperation and experimentation, of course I'm actually using an icon with a transparent background. When posted here it appears on this webpage as all white of course, but the non-black parts are actually fully transparent and have an alpha of 0:
But despite trying many combinations of all the various steps above, this is what it looks like on the device:
This is using iOS 10.n, latest 10.7 (it hasn't worked with any beta) and Xcode 8.6. If I download an app from the app store that uses action extensions then their icons are appearing, so there's no issue with the 10 beta. The issue is either something building the app with Xcode beta, or some step I've missed out - if that is the case, then what?
Finally found out the solution - in order to get it to work its additionally necessary to set the Asset Catalog compiler options of Build Settings section of the extension to specify the name of the app icon set within the asset catalog:
How to set an action icon really is the most appallingly badly documented aspect of iOS, totally shockingly awful.

App loading Image

sometimes when I start my App it shows me a black screen until its loaded.
Where is the place to add an Image or whatever to show that in instead of that nasty black screen?
Thanks in advance,
Philip
The black screen simply means that there is no launch image set for your app. The newest and in my opinion easiest way to add these is to use an Asset catalog.
If you created your app in a recent version of xCode, an asset catalog named Images.xcassets is automatically created for you.
Navigate to the same by clicking on it and then simply drag and drop your image into the same.
Here's a screenshot:
I would also strongly recommend that you maintain all graphics used in your app via this Asset catalog. The big advantage with using this process is you don't have to worry about the usual naming conventions you would need if you included graphics outside of an asset catalog - for e.g. You no longer have to name retina images as #2x
Something really simple in fact. Go to Xcode, Tap the project on the top, on the drop down menu on the top left select the target, then click General and select images at where it says Launch Images

Calling UIBarButton icons as images in iOS

I would like to use the system folder icon (UIBarButtonSystemItemOrganize) as the image on the left side of a table cell. Is there any way to call this icon in such a way that it can be used in cell.imageView.image?
No, you have to provide your own images. There are numerous free and paid icon sets that available provide similar icons.

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