iOS - detect when application exits

Question

How can I detect when a user exits the application? (hitting the home button) And how can I detect when the relaunch it? (clicking the icon)

*I'm not talking about users manually quitting the app by holding the home button and then making the icons wiggle and deleting the app instance from the sub-dock. i'm talking about just temporarily exiting the app buy clicking the home button.. maybe sending a text or whatnot then coming back to the app.

Thanks!

score 13 · Accepted Answer · answered Feb 25 '12 at 20:22

13

- (void)applicationDidEnterBackground:(UIApplication *)application

and

- (void)applicationDidBecomeActive:(UIApplication *)application

In your AppDelegate.m

- (void)applicationWillTerminate:(UIApplication *)application

answered Feb 25 '12 at 20:22

0xDE4E15B

1,294
1
11
25

Sweet thanks! Now I can read more about those int he documentation as well! very helpful! Thankyou! :) – Albert Renshaw Feb 25 '12 at 20:38

score 3 · Answer 2 · answered Feb 25 '12 at 20:22

3

There's a notification UIApplicationDidGoToBackground that fires when the home button is pressed. A similar notification tells you about going back to foreground.

answered Feb 25 '12 at 20:22

Nikolai Ruhe

80,564
16
176
197

1

UIApplicationDidEnterBackgroundNotification is what worked for me – Mike M May 30 '14 at 14:19

iOS - detect when application exits

2 Answers2

Linked