In what cases would iOS application would shows splash screen i.e., Default image (other than App Launch) ?
I am forcing a view controller to support landscape mode only
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationLandscapeRight || interfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}
If user is in this view and pushes the application to background and then bring it back up, app shows splash screen for < 1 second..
In another case if I have an UIAlertView open, push the application to background and bring it back up, app shows splash screen for a second.
Do we have any explanation about this in UIKit Documentation, and in what scenarios would multitasking in iOS will show user the Splash screen for a brief period.
Thanks.
Updated Question with an example:
If we go to Settings Application (for the first time) -> iTunes &App Stores -> Tap on AppleId: row -> You will be presented with an alertView -> Push Home button which takes the app to background -> bring the app back up. You will observe Default.png for Settings application for < 1 second before you will be presented with screen you were on before.
The system (SpringBoard) is responsible for managing your app snapshots. When you leave your app, a snapshot is written as a png file inside Library/Caches/Snapshots/com.yourcompany.yourapp/UIApplicationAutomaticSnapshotDefault-Portrait#2x.png
When you relaunch your app, SpringBoard tries to read that file and display it so that you have the impression that your app has woke up very fast. If it can not read that snapshot file, then it will display the Default.png instead.
I have noticed that Default.png is displayed only when you quit and relaunch your app very quickly. If you wait one or two seconds before relaunching your app, the system has time to write the snapshot and the Default.png is not displayed.
Since a system process is managing the display of snapshots, there is absolutely nothing you can do in your app to prevent Default.png to briefly appear.
The Default.png will only be displayed, if the app gets started from scratch. This means the first time, or it was closed completetly since it was opened the last time.
If you just run a standard app, you will see the Default.png at the first start only until it gets closed from the system (because of too less memory) or from the user via the multitasking bar.
Related
I am updating an old app, and I would like the app to run letterbox, NOT full screen on iPhone X. That is, I want the entire app to stay within the Safe Areas and see black bars on the top and bottom. Unfortunately the app uses a Launch Storyboard, which triggers the app to run full screen. The old solution was to use a launch image instead of a launch storyboard, but as of iOS 13 Apple has deprecated launch images. What can I do? The client definitely wants a logo to appear on launch.
What you are asking to do is now illegal. Your app must use a launch storyboard and occupy the entire screen or it will be rejected at the App Store.
The client definitely wants a logo to appear on launch.
Hmmm, it sounds as if you and/or the client don't understand what a launch screen is. A launch screen is merely the outline of the actual app interface, to provide something to fill the nasty pause between the time the user taps the app icon and the time the app's interface is up and running. If the client wants a logo on launch, that would be a view (possibly belonging to a view controller) shown as part of the running app when it starts up.
I'm trying to get my app's splash screen to be displayed correctly instead of a black screen for a few seconds before the splash screen. I have made 3 implementations of the splash screen; issues with each are listed below:
XIB: This only displays the background color of the splash screen for a few seconds and then the rest of the splash is loaded.
XIB + Asset Catalog: For iPhone 5 running iOS 8: if the phone is currently displaying the blue navigation bar and the app is opened from a url while in the background, a black screen will be displayed before the splash.
Storyboard: On all models: this displays a black splash screen before the actual one loads.
Is this an iOS bug or am I implementing something wrong?
You might want to check the logic that is executed when the application is launched - application:didFinishLaunchingWithOptions:. If it takes significant time to execute the code in it, then this might be the problem. It is always recommended to return fast and execute any additional logic on a later moment.
It's so quite simple! I had such bug and I solved it.
You should enable "Enable Initial View Controller" to see splash screen
I'm using an xib for my launch screen in iOS8 and SOMETIMES instead of showing the correct launch screen (which is 3 UILabels over a UIImageView) it shows as BLACK. But not every time. This I can reproduce both on a simulator and a device.
If I remove or hide the underlying ImageView it seems work without this issue.
The image in the ImageView is a .png image 242kb.
Any thoughts? Of course I could just use an image instead of a xib if I have to, but wondering if this is a known issue or how to fix.
The launch screen is generated when the app is installed in the iOS Simulator. We could wait for that process to finish before launching the app, but we instead let that generation happen in the background. If the image hasn't finished generating by the time it is requested by the app launch, only blackness is seen.
This is a known (and accepted) race condition in the iOS Simulator. Blocking until the image finished rendering would add a small amount of delay to the launch sequence every time you clicked Build&Run. If you want to debug the launch screen, you can quit the app (remove it from app switcher) and relaunch it manually (not via build & run).
This may decision may change in the future, but for now it shaves off a little bit of time between when you click "Build & Run" and when the app finishes launching.
I am observing a behavior. I am not sure if it is a normal behavior or not. My steps are as below :
1) start application by pressing application icon. it shows me launch image first and then displays rootviewcontroller.
2) I press home button. and my application goes in minimize state.
3) Now I change the orientation of the iPad and again tap to application icon. It again shows the launch image and then loads the rootview. If I do not change the orientation then it does not shows launch image next time I open the application.
Any suggestion or direction will be thankful.
When I load my iPhone app it always loads a black screen first then pops up the main window. This happens even with a simple empty app with a single window loaded.
I've noticed that when loading, most apps zoom in on the main window (or scale it to fit the screen, however you want to think about it) and then load the content of the screen, with no black screen (see the Contacts app for an example).
How do I achieve this effect?
Add a Default.png to your project. This should be the image you want shown instead of the black launch screen.
Also just to save you some time, there is no way to change this image during the runtime of your application. If you look at Apple's Clock application you can see how depending on the last state of the application, the Default.png changes. You cannot do this in your own app because of permission limits. Also, make sure to read the iPhone HIG for best practices on Default.png use, in short, dont use it as a splash screen like Twitteriffic.
You can also take a screenshot of your app as an aid to creating the Default.png - while holding the Home button, press and release the Lock Sleep/Wake button. The screenshot can be find in your Camery Roll library in the Photos app and can be synced back to your desktop.
When the app transitions from the launch image to the actual app content, it should not be jarring to a user - content (text/images) can be added to the screen, but content should never change. If all this leaves you with is an empty blue header, a white body, and a blue footer - then that's all you should have. If you have a persistent tab bar on the bottom & a localized app (different text descriptions), then then launch image should appear with icons but no text. (See Clock.app & Facebook.app for examples.)
Screenshots can also be taken in XCode using the Screenshot tab in the Organizer window and a plugged-in device.