How to reload my view when my app becomes active again?

Question

Let say someone is using my app and the change the settings in the settings bundle, when they come back to my app I would like my view to update (via my updating method) according to those settings. I've tried many different things but I just can't get it to work.

What is the best way to implement this kind of behavior for my iPhone app?

score 6 · Answer 1 · edited Nov 23 '17 at 01:34

in your AppDelegate put these methods:

- (void)applicationWillEnterForeground:(UIApplication *)application {
    /*
     Called as part of  transition from the background to the active state: here you can undo many of the changes made on entering the background.
     */
}


- (void)applicationDidBecomeActive:(UIApplication *)application {
    /*
     Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
     */
}

Then you have hooks to do whatever you want.

score 4 · Accepted Answer · edited May 23 '17 at 12:18

4

It's worth noting that you're not limited to the AppDelegate; you can listen for these events from anywhere in your code with an NSNotification. See this answer for more details on how to listen for UIApplicationDidBecomeActiveNotification.

edited May 23 '17 at 12:18

Community

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1

answered Jan 20 '11 at 17:31

Reed Olsen

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Interesting, never knew that notification was fired! – sudo rm -rf Jan 20 '11 at 17:32

How to reload my view when my app becomes active again?

2 Answers2