This question already has answers here:
UIApplication openURL background
(3 answers)
Closed 6 years ago.
I am able to open another application from my application using URL Schemes on a button click or app in foreground.
By using the below code.
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"urlscheme://"]];
But, I can not open the application if my application from background.
I have enabled background fetch - It is woking fine.
How can I open the application when background task is running ?
You can not open app in background because In background you can shared resourced , user data.
You can use remote and local notification.
Related
This question already has answers here:
Detect when app killed by user in background state iOS
(2 answers)
Closed 2 years ago.
Is there a way to execute an action when a React Native app terminates? I know about app states, but I'm looking for a way to call an action when the user swipes to kill the app, not when it's just in the background.
From my understanding, there is no way in doing this within React Native. Is there a way I could do it natively? I only need this functionality for iOS. Thanks a lot!
Hi you've got to go native code. In the AppDelegate you need to implement the method
- (void)applicationWillTerminate:(UIApplication *)application;
more info about applicationWillTerminate
inside of it you can resolve a Promise that you defined in our module
This question already has answers here:
Continue uploading process in background IOS
(4 answers)
Closed 5 years ago.
in my application user can upload a file, but if he lock his phone, it stops uploading. Is there any way to upload or download when the phone is locked ?
This is by design. Apple does not want iOS apps to run in the background as they might drain the battery.
But Apple has added many APIs so iOS can take over the background task on behalf of the app. And uploading and downloading is one of these tasks.
Have a look at NSURLSession and in particular at NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:. This is how it's done.
So with the way iOS works, Apple pauses background applications when the device is locked. You'll have to use specific API calls to allow your app to continue working in background, such as beginBackgroundTaskWithExpirationHandler
This question already has answers here:
iOS how to detect when app was removed from process
(4 answers)
Closed 6 years ago.
If my app is running in the background, and I force close it, how can I get the app to detect it was force closed in the background? Is there a specific function I can call to detect this?
You can use
func applicationWillTerminate(_ application: UIApplication) {
}
within AppDelegate class to observe when the app will be terminated. Documentation.
Edit: Please, note that as it written in docs
Suspended apps are not notified of termination
This question already has answers here:
Save the current status when quit, auto-reload when re-open the app
(2 answers)
Closed 6 years ago.
I want, using Swift in iOS, to capture a variable before the app closes from a subview and place it in storage, and prior to the app gets too far along on re-open restore this variable.
I know how to get and set, I just am hoping to stumble across the events that trigger before the app closes and shortly after it launchers.
You should do this in the AppDelegate.swift file.
I'm developing a running app for iPhone.The app can keep running in background.Sometimes the app is closed in background because of low memory.Even Nike+ app has the question too.
So I need to know how to save data in time when app is closed by ios system.
You should save in the method 'applicationDidEnterBackground:'
You can do this in the class appDelegate or add observer for name UIApplicationDidEnterBackgroundNotification