I understand, Its a HIG violation to play around with the default launch icons and splash screens, but I have requirement such that, I need to display the splash screen only for the first time, Is it possible to implement it ?
One simple solution, I can think of is : displaying as an imageView on top of UIwindow and then removing it based on a timer. Am looking for other options.
My advice is to rework your view hierarchy so that the first view mimics the splash screen you wish to show (A view controller with a uiimage embedded should work fine for what you've described). Then push the "main screen" over top of that view after your specific period of time. A little code to ensure that this happens only on the first run with some persistent storage and you should be good to go.
I do not advise working with UIWindow directly. Doing so can lead to all sorts of headaches.
That is to simple.
But you aren't need to manipulate the launch image, but an image loaded by your app.
To prevent to launch the second time you can set a flag in the internal storage.
Make sure to use a lazy load / initalization technique and display the image fast as much is possible, than do the initializations.
I hope it helps!
If you use iOS6, you can use restoration feature.
At first run your app will show launch image. All other runs it'll show last state screenshot.
So you know its a HIG violation but looking for some workaround.
You have to have a launch image while uploading the app and showing on first launch.
I assume you dont care about app review in appstore.
Lets think
Launch image has to be in main bundle. And the main bundle is readonly for your code.
I have some workaround but it may work only for second time launch to show the launch image and then no again.
Add your launch image with any name
Add a symlink to your app bundle with name Default.png, which shows the file in 3. step
Copy that launch image to your app directory folder (your symlink in app bundle shows the file) on first launch.
Launch second time the app and see the launch image
Delete the copied image.
When your app can not find a png file which showed by your symlink it can not show launch image
PS: Personally I did not try that but may work.
Related
So I am new to iOS development and I have a question about the launch screen.
My app will have an image (that loads when the app opens from the internet) this can change anytime the image is updated on the website, so what is the done thing when designing a launch screen as the image could be different to what is on the launch screen?
Thanks
In Apple's Human Interface Guidelines, they suggest that the launch screen should match the first screen of your app. In the example they give, the only parts of the launch screen are the non-dynamic parts (the UI around the web content).
Design a launch screen that’s nearly identical to the first screen of your app. If you include elements that look different when the app finishes launching, people can experience an unpleasant flash between the launch screen and the first screen of the app.
The launch screen is presented before your app loads, and it should be used for static content only.
If there are any UI elements around the image that is displayed, show those in your launch screen. If not, choose a neutral background color that works well with the theme of your app.
Omit the image. A launch image should be a bare outline of what the screen will certainly contain. It might be no more than the correctly-colored background. It is just to cover the gap between nothing and something.
Read the Guidelines: https://developer.apple.com/ios/human-interface-guidelines/graphics/launch-screen/ Look at the picture on the left. That's a launch screen — basically empty.
LaunchScreen image is always the same..
You can set it in LaunchScreen.storyboard
The launch screen is used to display something whilst your app is initialising, making network requests or whatever.
You shouldn't be looking to load dynamic content here as if a user is on a very slow connection then they wont see anything until your image has loaded. This is why it doesn't have a view controller associated with it. it should be static.
You should only really be loading your logo or something in here, you could just use the company name. it will only show for a short amount of time. then when assets change, submit the changes to store
I've designed a launch screen using story board. It's supposed to have 3 images. 2 of these are static, where as, i need to update one at run time (after downloading that from server).
My understanding is that we can not add code for launch screen as there is no controller for this at backend.
What i want to do is to use some default place-holder for the first time. Download & cache that dynamic image at some other point in application. And when user use the app for the 2nd time, show the cached image.
Any solution? Can i update xcassets at run time? Or can i update the image using keypath?
Update:
Just found that launch screen and splash screen are 2 different things (Link). Adding content in launch screen dynamically is not possible. Whereas, using splash screen (without any need) is not recommended.
This is not possible, the story board used at launch time is in the main bundle of the application which is readonly and can not be changed.
Also you (edit) can't run any code on startup, since your app is not running.
I have a launch image with text, that I'd like to internationalize (I know that Apple doesn't like launch images with text though...).
It would be great, if I could do this in code, because then the footprint of the app will be much smaller.
Is it possible to do so and how would I access the launch image? I know the the app icon can't be created dynamically by code, thats why I guess the launch image might follow the same rule.
Thanks.
If you mean the Default.png, no you can't.
As you mentioned, you can localize them but it will raise your app size.
One possible solution is to make a really quick app start and a launch image without a text and right after your app launch (-applicationDidFinishLaunching may be appropriate) you display a pseudo splashscreen with your localized text for n seconds.
But keep in mind this isn't nice nor something apple wants.
This can not be done, since the launch image is in the application bundle which is readonly.
You could however present a second screen just after launching, if you make sure you do not do anything in the application:didFinishLaunchingWithOptions: but show you seconds splashscreen it will only show the default.png for a very short time.
The purpose of launch images is to fake that the app is starting to give time to the app to fully load but I have this app of mine that is so fast to load that the launch image just is visible for less than 0.1 seconds. I have tested the app without the launch image and it loads fast than with a launch image.
When I submit the app to Apple without the launch image it fails validation.
This is ridiculous. Is there a way to solve that?
thanks.
The general rule of thumb is to use a launch image that looks like the first screen of your app with text removed, so it looks like a blank slate of your interface. Once your app starts rendering, it will be obvious to the user that it's reached that point.
Many times games will have a splash screen, especially since they sometimes load resources during that time. So those will usually either have a launch image that is their splash screen, where once rendering it starts it makes some animation occur, or they will sometimes start with a black launch image because the logo/splash will fade in.
As you said, the app fails validation without the launch image. Also when Apple first came out with the iPhone 5, the way you added support for the iPhone 5 screen size was by adding a launch image at that size. So in that case Apple is actually using the presence of the launch image to determine if you support the screen size or not. In other words, you need launch images, and it does help with the user experience, even if it is only visible for a split second.
There is no way to solve it - you must have a launch image.
You could use a launch image that looks a lot like your first page, so it doesn't look so jarring when it briefly flashes up.
Last I checked when you don't have a launch image for a debug build iOS uses a default image. If I remember right it is black. So you could create an all black image and use that.
Ive personally never used a launch image and have gotten all of my apps approved. Maybe you're failing validation because of something else?
you do not need a launch image. This is not causing you to fail validation
I'm using Trigger.IO's toolkit to add the launch images. After doing so, the app fails to remove them from view after initially starting up the app. After hitting home and then going back to the app, the launch image disappears after launch.
The app isn't actually freezing after launch but just keeping the launch image at the forefront. I used a partially transparent image initially, and it appeared just to have a high z-index. I could use the app, but the launch image remained on screen over the top of everything.
As of platform version v1.4.20 you can control the launchimage visibility (http://docs.trigger.io/en/v1.4/release-notes.html#v1-4-20).
We've seen some instances of very early usage of the Forge APIs causing the launchimage not to show. In most cases, leaving the launchimage to hide itself manually is fine; if you're having problems or want more control over the launchimage, you can use forge.launchimage.hide.
Very odd, the problem seems to have dissipated even though I have not attempted to address it directly considering it was merely a config file change.
I'll report back if the problem surfaces again, but all is well currently!
Try add to use this code line
[window setRootViewController:mainController];
For full help, we need a some your codes