I want to animate a set of images in my Launch Screen, but I do not know how. I have seen some tutorials telling me to put code in the App Delegate (DidFinishLaunchingWithOptions) and nothing has worked.
Could someone help me animate my Launch Screen?
I am supposing that you do quite a bit of work on launch, and you do not want your user to stare at a static image while this work is going on. What you need to do is do the work in the background (using gcd). This way, the launch screen will be gone quickly. However, you are not ready of course: hence your need for animations. So what I do is add my own equivalent of the start screen on top of my first visible UIView, do my animations and then tear down my start up screen. If you want to see what I do in action, try it out with my App (The Opera Player)
Related
Apps set to Screen time are strongly constrained by their behavior.
If the screen time starts while the app is running, the nature of the app causes problems in operation.
Normally, the setting screen is called by the following code, but I do not know how to call Screen Time.
UIApplication.sharedApplication().openURL(settingsURL)
Do you know how to do that? Or tell me if there is another way around it.
I have used the LaunchScreen.storyboard file in my swift file to create a launch screen, however I only see the launch screen when I load the app onto my phone. After that, even when I kill the app I don't see the launchscreen again. I want it so that it shows every time the app is booted, so after it's been removed from the background like most other apps that exist. I there a setting that i need to toggle, or am I doing something wrong?
What you want can be achieved from the initial ViewController instead of Launch Screen.
Reason: Launch Screen timing is not fixed and can have a very short appearance if the app has recently been in the memory.
I would recommend you to use the welcome graphic/animation on the initial View Controller and move to the intended View Controller after a set timer by using a segue.
Edit: Additionally, in case of a graphic, you can put that on the Launch screen as well, then on the initial View Controller. That will get you continuity.
Hope this helps.
does anyone know if there is a way to tell if the launch storyboard executed? Or is there a way to detect if the launch image was displayed?
Basically my app consists of just one view controller with some views (all created programmatically), plus the launch storyboard which I added to the project recently which seems to be working OK.
The reason why it would be useful for me to know if the launch storyboard happened is that my app is a game which basically consists of a big 2D scene that you can zoom into and pan around using the usual touch gestures. When the game starts for the first time it starts fully zoomed-out and centered on the scene: so that is what the launch image matches. But the player pans around and zooms-in on various things, so when they press the home button they could be zoomed into any part of the picture. So when they touch the app's icon to relaunch, if the launch storyboard happens it needs to put their pan/zoom position back to the initial centered zoomed-out position (otherwise as soon as the app gets going it would appear to the user to suddenly snap from the initial position represented in the launch image to where they were, not giving a smooth user experience).
What I do at the moment is -- if applicationDidEnterBackground: method gets called I assume that when the user relaunches the app, by touching the icon, that the launch storyboard will be executed. But the launch storyboard doesn't always happen after it hibernated via applicationDidEnterBackground:, especially if it is only a few minutes since the user pressed the home button.... and those times when the launch storyboard does not happen I need not inconvenience the player and put them back to the initial zoomed-out centered position, I could just let them carry on at the position they were.
I've not used storyboards before, but as I understand it launch storyboard are a special case where you can't make any connections to code because your app's not actually running yet, so I can't think of a way to set a variable, for example, to show the story board happened.
Anyone got any ideas?
Cheers,
Jon
Just use the viewDidLoad method provided by the UIViewController.
Just override the method in your ViewController and then you can perform the task you want when your View(Storyboard) is loaded.
Example:
#implementation MyViewController:UIViewController
-(void)viewDidLoad{
//Insert your code here
}
#end
I'm developing an app on iOS 7 with a desired feature is that
When I home button, app enter background, I will add an image to current UIWindow. So when app enter background, if user double home button on iOS 7, os will show a small screenshot of current view of my app, so user can see my added image. :) (I did it)
When user return my app by clicking app icon, I want to remove this image immediately. In this situation, "immediately" means that user can NOT see this image anymore, user just see his/her current view when app enter foreground. I try to place the code remove image on the beginning of applicationWillEnterForeground delegate, but I'm still able to see this image for a short time after it disappears.
I also try to set hidden, alpha property for this imageview first, then removeFromSuperview, but it not works.
Can anyone help me to remove it "immediately" as my desire.
That is done automatically for all applications, you don't need to do anything in you code.
I don't think that you can do it faster, it depends of device performance. Sorry man.
Like other says it is really tricky how iOS handles these events. I've been researching and depends on the memory state of the device to do it faster or not. Indeed, in iPhone 4 and 4S may not show the image that you added on applicationWillEnterForeground method.
If I were you I would solve it by adding a smooth fade out animation of that image when the app becomes active again. With [UIView animateWithDuration: animations:] it could be nicely done! :)
If I find out something else I'll answer here!
In my app I use iphone camera, but the process is very low when I open it; then I want to start the process when I shows a splashscreen.
The problem is that when splashscreen ends I don't want to show camera.
Then while I show splashscreen I want to start process of camera and quit it before splashscreen disappear. Is it possible?
First up, Apple specifically advise against using splash screens in their Human Interface Guidelines document. I don't know if your app would get rejected for it, but best not to try.
Second, it sounds like you need to optimise the startup of your application and probably the first view controller. To do this, you need to put off loading/initialising everything you can until it's actually needed (known as "lazy initialisation). All code in applicationDidFinishLaunching: in your app delegate and your view controller's init method, loadView, viewDidLoad, viewWillAppear, viewDidAppear should be reviewed for stuff that could be done later.