I have an App that is all day working in the same place and need a way to simulate a sleep mode as best as possible during a range of time.
I thought a simple solution, adding a black view... but sure there are better options. Can I control the brightness of the screen of the device? Any suggestions?
Thanks!
Normally an app that's running but has no user interaction for some period of time causes iOS to go into its own sleep mode. So your app sets that condition to keep the UI active all the time?
If so, sure, add a view to the window and animate it from transparent to full black. Put a gesture recognizer on it so if the user taps it, you animate back into translucent mode, then remove the view.
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I develop an iOS Keyboard extension, and I'm using scroll gestures on keyboard. Sometimes when using the keyboard I scroll up the control center and my keyboard stops working fine. Is there any way to detect if control center become visible, or invisible?
You can't do it directly. The most you can know is that your app was deactivated and then activated again. It could be because of the control center, it could be because of the notification center, it could be because a phone call came in, it could be because the user went into the app switcher and came back again...
Here is the possible work around you can try:
It is the UIWindow subclass to enable behavior like adaptive round-corners & detecting when Control Center is opened. This UIWindow subclass does probably the thing you want. You simply subscribe to an NSNotification and can react to the user opening Control Center. Detailed instructions and setup on Github
https://github.com/aaronabentheuer/AAWindow
[AAWindow: The way this is accomplished is by using a combination of NSTimer and overwriting sendEvent in UIWindow to receive all touches without blocking them. So you basically receive all touches check if they are near the lower edge of the screen, if yes set a timer for a half a second and if during this timer is running applicationWillResignActive is called you can be almost certain that ControlCenter is opened. The time has to vary if there's no statusbar, because then the app is in fullscreen and it can take the user up to 3 seconds to launch Control Center.]
Hope it would help you figure out the exact solution to your problem.
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)
Until today I believed that it's impossible but there is an app is called Shou from the Emu4iOS Store that record your screen and even if the app is in background there is a view on home screen that on touch redirect you to the app. (please see attached image)
My Question is how can I achieve the same ? How can I add a view to Home screen ?
That's a status bar in a recording state. These are system defined states, such as the green bar you get while taking a call. These appear when an app is recording audio automatically, and there is no way to trigger it manually.
There is no way to add views and gesture recognizers on to the springboard.
With reachability I mean this iOS feature (a feature that makes it easier to use apps with just one hand, it is executed by double-tapping the home button without actually pressing it):
Is it possible to set a background instead of the black screen?
You can't do it. When you tap the button the system lowers the entire UIWindow of your application so the black background is actually outside your sandbox and you can't touch it.
No, it's not possible to do so.
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!