Can I check device brightness of iOS device's screen if application is in background state to see if the device is in use or not? If not, is there any other solution to check if device is in running state or in idle state?
No, if your app is backgrounded is suspended until an event wakes it up.
You can't monitor the behaviour of the phone from a backgrounded app.
You will not have control over the application when its in background state. you can monitor it only when your application is in active state.
Related
I'm making an iOS app to support a Bluetooth LE device. First time the app launches, we pair, but after that I want to communicate with the device whenever it is in range. Using background modes, this works fine for when the app is launched and goes into background and the screen is turned off. But, when the phone is rebooted, the app needs to be relaunched before it will be able to detect the device.
Is there any way to have the app launch in the background whenever the BLE device that it is paired to comes nearby?
In case of user forcibly kills the app by double clicking on home button and swipe out, it will not be relaunched until the user launches it again.
Coming to your case when Device is rebooted - Yes, you can configure State Preservation and Restoration to relaunch the app when user has not killed it forcibly before rebooting.
( Note: If the device requires a passcode to unlock, apps will not be relaunched until the device is unlocked for the first time after a restart )
Also, it is important to keep in mind that the app will be relaunched and restored if and only if it is pending on a specific Bluetooth event or action (like scanning, connecting, or a subscribed notification characteristic), and this event has occurred.
For more info:
Conditions Under Which Bluetooth State Restoration Will Relaunch An App
I was using location updates as background mode on Apple Watch series 2..
my issue is when I removed app from dock or foreground. my app is again re-launching to foreground after unlocking watch.
But I don't want to re-launch app automatically until user manually re-launchig the app. How I can achieve this...
is their any way to handle this...
If my app is in background/suspend mode, it will fetch data and work fine. But when I restart the iPhone the app isn't more in the background mode.
Is it possible on device start, that the app will be in the same mode (background mode) as before the restart without user activity?
Afaik, this is only possible if you specify voip as your background mode.
https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html#//apple_ref/doc/uid/TP40009252-SW22
I've developed Android app which has a background service in the sleep mode. This service works with accelerometer data and can launch the app from the sleep mode over the lock screen.
Is it possible to make the same on iOS?
I mean:
Create a service which can work in background with accelerometer data.
Service can launch the app when the phone is in the sleep mode over lock screen. (without unlocking)
If I'm not mistaken it must be possible on iOS7, isn't it?
Thanks!
Yes – Apple publicly stated background processing at WWDC keynote and it can be done to a degree on iOS6
No – Apple will 'probably' never allow an app to be opened without the user instigating it and certainly not over the lock screen.
You could use Push / Local Notifications which do appear on the lock screen to try and entice a user at a specific time to launch the app but no guarantees.
My app is running in background mode because I'm playing and recording audio. I wish to find the device orientation while I'm recording. I set up notification that tells me when the orientation changes and it works fine while the app is active on screen.
My problem is that when I'm moving to background mode the notifications stop coming.
Is there a way to keep getting these notifications while my app is in background mode?
Thanks in advance.
You can check device orientation when your app resumes from background. UIApplicationDelegate protocol has several methods for handling app's transition from background to foreground; check this answer for nice writeup.