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Can we lock the app while app goes to sleep mode in IPhone?
(4 answers)
Closed 9 years ago.
I am working on an app with passcode locking option(pic1). When I enter correct password it enters into the app.When I enter wrong password it will perform some other action(pic2).
After some time the app goes into the sleep state,when the app comes to active state we have to enter the password again.
Here my requirement is I want to open the "passcode locking screen" (pic1.,which was created by me) after unlocking the device,(pic3.,which is default locking option in Iphone). Unless I enter the correct passcode the "passcode screen" should stick to the window. It should not move to any other screen (pic4., screen with group of app icons) though I click the button of theiphone.
This requirement is killing my time, I don't mind to post sample code or tutorials if you have gone through.
you can't do this using a non-jailbreak iPhone. an app cannot prohibit the user from switching to another app (and it cannot modify another app)
that applies to the springboard (pic4) too of course
Related
Until now asper my knowledge it was not possible to restrict the app from exiting. User could press the home button and app will exit. Then came multitasking and when we press home button app would go in background, but on long press user can still close the app.
I am working on developing anti-theft kind of application and needed to lock the phone programatically, but seems that it is not possible.
Also another problem was if user exits app then there is no way it will get notifications from the web. After some research I found the we can restrict the application from being exited using GUIDED ACCESS facility provided by iPhone6.
But all the links that I found states the procedure to do it from settings menu of iPhone.
I wanted to know if there is any way to do it programmatically or at least display relevent iphone settings screen directly.
It is not possible to restrict your app from exiting or allowing it to lock the iPhone programatically.
This is FAR beyond the scope and bounds of security for your app to infect the system this way.
As for Guided Access it is a feature provided in iOS6 allowing parents to use their device with their kids and prevent accidental app exits or unintentional taps outside a certain bounds. It also has availability in a kiosk mode for small businesses using iPads as public information access points that want the iPad locked to an app or webpage. It is not a public API allowing your app to turn such blocks on. This again is for the security of the device.
I am writing an alarm clock app for iphone, and I want it to turn on the phone(from standby mode) approx 1hr before the alarm is supposed to go off.
Then I want the app to be active, so I can stream content live without the user having to put the phone in an active-mode.
Any way for an app to switch out of standby?
Without using private api an application can only present alertview (via local or push notification).
And only when user taps "view" button this application can be activated. You can see that in the link you provided - (second to last screenshot)
True, you can always add sound to this notifications - so alarm app can work (and there are many out there) but it can't send itself in the foreground.
Nope that cant be done, once the app went to the background state you lose control on it, and cannot bring it back
There might be a way using notifications. Check this SO question for more info:
Alarm Even Application Closed in iPhone
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
How To Switch music from my app to the ipod
There is an iPhone application named WeatherTunes (天气旋律闹钟 in Chinese) in iPhone AppStor, search with key words "WeatherTunes " e, it appears at the first.
You can add alarm in WeatherTunes, even if you switch this application to background, it still runs. I look into its info.plist file, I noticed it set the "required background modes" with value "App plays audio". But I still can't figure out how it can be run in background? Thanks for any help.
Apps can run in the background if they have any of the 5 requirements:
Apps that play audio while in the Background state. A good example is Instacast while it’s playing a podcast.
Apps that track your location in the background. For example, you still want voice prompts from your turn-by-turn GPS navigation app, even if another app is Active.
Apps that listen for incoming voice-over-IP (VOIP) calls. If you use Skype on iOS, you can receive incoming Skype calls while the app is in the background.
Newsstand apps that are downloading new content.
Apps that receive continuous updates from an external accessory in the background.
It may be possible that this app is playing a silent audio file in the background, a tactic that I have seen before, but generally that will be rejected from the apple store.
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If background applications can't launch automatically how does Cardcase launch on a location change?
(2 answers)
Closed 9 years ago.
I was wondering if it is possible to tell the iphone operating system to lauch my application when I enter a particular region...If it is how can I do it?
Thank you
This will happen automatically for region monitoring - Once your application has registered for region monitoring (while it was running) and then gets suspended or stopped, and then if the region is crossed even when you app is not running the app is re-launched in the background to handle that event, from there you can post local notifications etc to alert the user and bring the app to foreground if the user is interested.
See reference to the Apple documentation here
No, your application can't launch itself for any reason.
You can, however, use background location and background local notifications to alert the user and allow them to opt to open your app.
I am fairly new to iphone app development. I am creating an app that has multiple views. Initially it starts with a view for authentication and then load views according to user interaction. When I build and run the app - the first time it shows the "Default.png" screen and then shows the first view where I do my authentication process (typing in userid,password and do a web service) and then after the credentials are verified it takes me to the next view. When I close the app at this state in the simulator and reopen it again, I am seeing the same state in which I closed my app. But here is what I want. When I relaunch the app I should be able to show the "DEfault.png" and screen and then show my initial authentication view. Can you please help me out on this ? Thanks
It sounds like the problem you are trying to solve is that your authenticated session may time out while the app is suspended and you need to log in again.
Although the proposed solution (setting UIApplicationExistsOnSuspend to true) would work I think you should consider a different approach.
Apple recommends that you do everything you can to make it look like the phone supports multitasking. That is why, by default, your app will suspend and resume instead of exit and relaunch. In your case, though, you may need to re-login to resume the session. I offer you a couple of alternate solutions:
Cache the credentials (ie username and password) and silently use them to resume the session when needed. If the back-end supports this.
Detect when the session has become stale and bring in a view to inform the user that the session has expired and ask them to log in again. This would also address the issue if the user keeps the app active past the timeout of the session.
Both of these approaches should improve perceived app performance and integrate better into the Apple usability guidelines.
That's because iOS 4 apps are supposed to support multitasking. You can change the app so it doesn't: In Info.plist, set UIApplicationExitsOnSuspend to true (i.e. <key> UIApplicationExitsOnSuspend</key><true/>) — make sure it's a boolean and not a string. Note that this will probably make startup slower, since the app has to be launched again.
The other way is to handle applicationDidEnterBackground: in your app delegate and do two things:
Reset your view hierarchy (you can do this on next launch, but doing it earlier might help to free more memory)
Show "Default.png" in a full-screen view — iOS takes a screenshot of your app after it's hidden which it uses to animate the app back in.