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Toggling Privacy settings will kill the app
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Closed 4 years ago.
I am making an iOS app and I am new in iOS world. In this app, I want to access user contacts. Everything is going good and working well. But I experienced a amazing behavior which I have not seen in Android since I am android developer.
In iOS to access user contacts I am using Contacts Framework. I think it is relatively more easy and fast then anyother else in the iOS. However, I did not able to completely take advantage of that. Let me tell you what I did and what Problem did I faced.
What I have done I cask for permission on ViewController and User is prompt with Dialog asking for contacts permission. If user allow permission, everything goes well, but when user dont allow the permission here comes the trouble.
Accessing User contacts are more necessary since My app's whole working and basic business idea is upon user contacts. Now to handle this, when user Do not allow permission I am showing another dialog telling him that He must allow permission so that App can continue, So far so good.
Now I am taking user to settings where he can allow the permission or he can simply go again back. Now checkout 2 cases
CASE 1: When User come on Settings screen and go back again without
allowing permission
When I take user to Settings screen and instead of allowing permission he gets back to my app I try to show him same dialog again to enable permission in every case. This is going good. I mean for testing purpose I repeat same procedure manytimes, I mean I do not allow my self Contacts permission, It takes me to setting scree, from settings screen I get back to my app and again I am able to see same dialog that took me to settings scree. THIS IS FINE
CASE 2: When User is taken to settings screen and he permits the
permission:
Here when user allows the permission I get message in the log that is "Message from debugger: Terminated due to signal 9". And when I get back to my app, it starts over again. Looks like my app gets re-open or crashed being in background.
Important: For this I examined my memory or task anything that is being performed in background, but there is nothing going on in background. My memory size before crashing is 54.78 mb. And I do not think so it is worth worying.
Any one have idea what is going on??
Your app is not crashing its just forced to restart by iOS with new privacy settings. iOS will SIGKILL the app. (it's default behaviour of iOS). You can checkout - WWDC 2012 Session Videos: Privacy Support in iOS and OS X for more info on this.
This does not hold true for Location permissions.
It is expected behaviour. iOS terminates the app when user changes permission for Contacts, Camera, Microphone and Photos (and possibly some others).
Related
I’m using Crashlytics for internal application tests and noticed one interesting thing. I’m using geolocation in my app and asking for permissions from a user. When customer install app for first time he sees default Apple’s geolocation permissions asking pop up. And everything work fine.
But, if user will remove app from phone and install it again... in this case, when I’m asking for permissions, pop up just won’t appear BUT geolocation is WORKING. How? Is this some sort of new feature or iOS issue? I were testing with iOS 11.0.3. I haven’t found anything in documentation, and haven’t seen this behavior in previous iOS versions. Looks like iOS just memorize the app and automatically enables geolocation when I’m asking for user permissions instead of showing pop up.
Maybe someone has answer for this?
it is possible that there could be a mistake in your code pattern while checking authorization status, the behavior you are seeing is likely due to iOS caching location permissions for apps.
In your code, make sure that you check authorization status (via the authorizationStatus() method), and continue with requesting location authorization when the current status is .notDetermined (kCLAuthorizationStatusNotDetermined)
iOS does cache authorization status for apps as well. If you would like to reset your location permissions for testing purposes, you can set your location privacy settings to the factory default: go to Settings > General > Reset and tap Reset Location & Privacy. When your location and privacy settings are reset, apps will stop using your location until you grant them permission.
Unfortunately there is no developer control over this.
Caching of permissions for apps is in an ever evolving stage, where we are trying to find the best user experience, so you may have noticed some changes lately. Also, there will be a grace period where the app uninstall to reinstall time might be making a difference.
If your observations of apps that behave like you expected are recent (on the same version of iOS that you have observed your app behave differently), and the uninstall/reinstall time difference is immediate (like how you probably test your app), please let me know which apps, and I will see if I can dig some information.
I am writing an app that records an audio file from the user. I noticed that when other apps that do something similar are installed, a window is displayed, warning the user that the app wants to access the microphone, and the user has to explicit give permission to the app to do so.
Does Qt have any API that tells iOS about the intention of the app to access certain devices, which would cause that warning window to be displayed?
Thanks!
You don't have to handle it manually. iOS will automatically ask for permission if the user didn't accept it before.
The very first time your app will need microphone, an alert will be displayed. If the user allows it, he will never see the alert again. If he refuses, he will have to turn it ON manually in iOS settings. Nevertheless, there's maybe a way to handle a previous refusing in-app.
I have designed an app where the app needs to enable the GPS. There is a page for the user which ask use GPS? To this answer there are 2 options YES and NO. Now my concern is when user clicks on YES he should be directed to settings page and that part is done but now after enabling the GPS from this page the user should redirect to the app again but unfortunately there is no way as there is no back button in the setting page.. Please suggest what I can do in this regards?
As far as I know, the only way to open your app (aside from user tap your app or a related notification) is to do some custom url handling. but unfortunately you can't do such a thing. The other thing you can try is to:
Setup a background thread when your app goes to background
check for location service availability
if it changed to your desired value, open a custom url which in turn will open your app (you should register for hat particular url in your info.plist and such)
but There are some things to keep in mind:
Such Behavior will almost surely get your app rejected by Apple.
in iOS 9+ Apple added a new feature that will help you in this particular problem. when an app gets opened from another app (settings.app for you here) it will add a Back to xxxx in place for network indicator to help user get back were he was.
So, IMHO leave the user experience be as it is for all other applications and don't worry about how he would get back to your app.
I'm trying out this code: http://github.com/akpw/AssetLibraryPhotosViewer to access photos on my iPhone.
However when I run the application, I get an alert that says the application is trying to access my photos - and then I can allow this or decline.
Can I disable this when using the AssetLibrary, or does this message always appear?
If I can't turn this off, and I press "Don't Allow", can I still make the app access my photos?
Following on from answer above. This will appear once. If you allow access then it will not show again and you will have access to the photo's. If you disallow it then you will not be allowed to access this and the alert dialog will not appear again.
This permission can be changed at any time by the user in the settings app (Under Location and Privacy, or a variation of that.) This has been around since iOS 6 I believe.
You are never able to programtically state that access has been granted, the system handles the permissions which are shown to the user.
This is a security feature of the OS that cannot be disabled. If a user does not give your app permission to access the photo library your app will not be able to access any photos. Given this ability your app should be able to handle the situation gracefully from a UI/UX perspective.
For more information take a look at this guide from Apple about iOS security guidelines (page 47 takes about accessing personal data) iOS Security
I am really stuck on this problem and I need your help!
I'm doing an ipad game with unity and the social network plugin from prime31.
The situation:
When you arrive to the end of level, the game gives you your score and ask if you want to submit it to facebook. If you do, In my script I've done a system that checks if you are logged in, if you aren't it ask you to login and then the system checks if the app has the publish permissions and if not it ask you the permission. If all theses if are true it posts a message to your wall straight. So hopefully the login/asking part needs to be done only once.
The problem:
When the ipad swap between the game and the facebook app to login, the ipad shutdown the game for saving memory. I've tried to reduce the scene, but it's hard to reduce it more than it is. So I thought maybe I should open that facebook login and authorisation inGame. For that I tried working with this:
setSessionLoginBehavior(FacebookSessionLoginBehavior.ForcingWebView);
And it does exactly what I want, it opens a small window in game, doesn't crash all good really. But the problem, in this solution, is that it only works for the login, and when I ask the publish permission it switches back to the facebook app to ask the permission and therefore crashes.
After more research, it seems that it's not doable to control the ask permission behavior.
So back to square one, how can I prevent IOS to shutdown my game while the user connects to facebook. I'm still looking to reduce the scene.
I heard of using the app url and sending data for the app (my game) launch after leaving the facebook app and therefore ask the ipad to relaunch the app at a specific scene. But that would be really the last solution because it's going to take a lot of rework to make that happened.
If you have another suggestions to work around this problem I'm up for it. All I need is login -> ask for publish permissions -> post and come back to the end of level screen of my game.
Thanks for the help
Put simply, once your app is backgrounded, if iOS wants to shut it down, you can't prevent that from happening.
The best thing you can do is save the state of your app before handing over to the facebook app for the authentication side of things, and then reload your state when the app starts up again. You'll want to handle applicationWillResignActive:, applicationDidEnterBackground:, applicationDidBecomeActive: and applicationWillBecomeActive:.
The App States and Multitasking section of the iOS App Programming Guide explains how you can do this.
I think you should check for FBDialog for iOS 5 and beneath. And FBNativeDialogs for iOS 6.
These will pop a window on the top of your app, so I guess it will still be running. And for iOS 6's FBNativeDialogs
Provides methods to display native (i.e., non-Web-based) dialogs to
the user. Currently the iOS 6 sharing dialog is supported.