on iphone with multitasking and iOS 4.x i run my app it work properly, now if i hit the home button (send a sms) and then double click the home button to return to my app i've notice that the app run like the first time not continue where i left it what is the solution to return to the point where you click the home button.
thanks
You might want to make sure you're implementing the multitasking app delegate callbacks- check out the protocol reference: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html.
Related
I am going to develop an application which will be posted in cydia. My requirement is after unlocking the iphone when the user clicks the home button then my application need to be popedup(run) ..
is it possible to do this?
if yes how?
You can do this without any extra code by changing the settings in Activator. The app doesn't need to be in Cydia, either.
Confirm you have Activator installed from Cydia.
Go to the Settings app, followed by Activator.
Choose which environment you want the action to run in: Anywhere, Home Screen, in an app or Lock Screen.
Scroll down to “Home button” and tap the action you want.
Scroll down again, until you see the app you want. Tap it and confirm there is a check mark next to it.
Now your app will start every time the action occurs. If you want this to be automatically set when your app is installed, however, you'll need to include the libactivator header in your code and use its API to set the action. Because the header isn't included with iOS, you'll need to make the app for Cydia.
What does double-tapping on the home button exactly do?
Does it list the applications running in background, OR
Does it list recently used applications?
I've implemented the "Application does not run in background" in my Info.plist file. In spite of this my application shows on double tapping the home button !! Yes I have tried a clean build.
It shows all recently-used apps, not just the multi-tasking ones. If you try to tap your app now, it will start exactly like it was first launched, displaying the launch image first before initializing (calling application:didFinishLaunchingWithOptions: and sending the relevant notifications).
I do not want my app to switch to the "task bar" when the Home button is pressed. That's why I would like it to be closed upon Home press. I added this entry to the info.plist file but this does not change the behaviour:
application does not run in background
(and I checked the box...)
I rebuilt the whole app both in debug and release mode but no way. I heard of another key which should be added to the info.plist but I cannot add it through Xcode:
UIApplicationExitsOnSuspend
What is the right way to do that ?
Regards,
Franz
On iOS 4, multitasking is enabled in Xcode projects by default. This prevents the applicationWillTerminate method from being called. If you do not want to support multitasking, place UIApplicationExitsOnSuspend in your MyAppName-Info.plist file and check the checkbox. If you do want to support it, place any code in the applicationDidEnterBackground delegate method that you want to execute before the application enters an inactive state.
What you're doing will indeed stop the application from running in the background, but you can't prevent it from going to the multitasking bar still. Sorry.
You can manually close the application after home button is pressed. When home button is pressed applicationDidEnterBackground is called. In this delegate just write exit(0) and your application will be ended instantly.
Hallo Everyone,
with the iOS 4, the iPhone is supporting Multitasking, what is very nice, but something I do not wish to support in my Application. I mean, when the user press the Home-button, I want my application to finish and not to enter in Background. With the iOS 4, when the User press the Home-button, the App calls the applicationDidEnterBackground: delegate's method to enter in Background and in order to "force" the Application to finish when the user press the Home button, I've done following implementation:
- (void)applicationDidEnterBackground:(UIApplication *)application {
//save everything...
exit(0);
}
PROBLEM: I've noticed, that exit(0) brings the Application immediately to finish, without calling deallocating methods like "dealloc", and I think that is not a good programming style. So I would like to ask you guys, how to bring the application to finish in a "nicer" way.
Thanks in advance.
What you actually want is not to exit the application (which is as mentioned not allowed), but tell the OS you would rather your application be killed rather than backgrounded.
There is an info.plist key for that, UIApplicationExitsOnSuspend. Set that in your info.plist to TRUE (checked) and then when your app enters the background it will be terminated.
That's two questions:
How to programmatically exit an iPhone app - duplicate
Proper way to exit iPhone application?
How to cause an iPhone app to not go to background in iOS4:
Add the UIApplicationExitsOnSuspend key to your info.plist and set its value to YES
http://developer.apple.com/iphone/library/documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html#//apple_ref/doc/uid/TP40009252-SW23
One answer above says "There is an info.plist key for that, UIApplicationExitsOnSuspend. Set that in your info.plist to TRUE (checked) and then when your app enters the background it will be terminated." with Xcode 4, the info.plist value is "Application does not run in background" of type Boolean, so setting this to YES will have the app exit when the user presses the "home" button.
You are not allowed to. I know from experience: got an app rejection from Apple because I've exited (that was two and a half years ago but I doubt they've changed their policy here). There's a "private" (i.e. not mentioned in header file) method "terminate" on UIApplication, IIRC. But Apple says you may not do that. Only thing you can do is to show a dialog, asking the user to press the home button. But in turn doesn't work if on a device with multitasking enabled... so I guess you really have to change your application in such a way that you can throw away your state on applicationDidEnterBackground and start afresh on application on applicationDidBecomeActive.
Today i updated my 3GS i-phone to install my application to see it's functioning well in OS4,when i'm running the application and tap the home button it's goes to multitasking bar,then again i get the application from there it's goes to previous state where i was.i think the behavior is OK. but problem comes when i kill the application in multitasking bar and run it it's come to same state,simply it's ignore the login screen.
My question is when i kill the application i want to get my login screen, not the previous state, this application is working fine in 3GS,can some one please help me to fix this issue?
Thanks
Sam.
Sam,
If you don't want the OS to save state for you, you should place the key UIApplicationExitsOnSuspend in your info.plist file.
More information here: http://developer.apple.com/iphone/library/documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html#//apple_ref/doc/uid/TP40009252-SW23
This will kill the app when the home button is pressed, instead of suspending it into the background (which is what iOS4 does for multi-tasking).