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PONSTimer crash with EXC_BAD_ACCESS on Iphone when invalidate
 

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    <p>I have setup two timers in my application which both repeats every a few seconds. Everything works fine except when is time to invalidate the timers. When the phone is locked, I want to invalidate those timers and then recreate them when the phone is unlocked.</p> <p>Im using the notifications to realize when to invalidate/create the timers.</p> <pre><code> [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(notify_didBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(notify_willResigneActive:) name:UIApplicationWillResignActiveNotification object:nil]; </code></pre> <p>This is what the notify_didBecomeActive method contains:</p> <pre><code>clockTicker = [[NSTimer scheduledTimerWithTimeInterval: 1 target: self selector: @selector(showActivity) userInfo: nil repeats: YES] retain]; alarmTicker = [[NSTimer scheduledTimerWithTimeInterval: CONST_ALARMTIMER target: self selector: @selector(checkAndLaunchAlarm) userInfo: nil repeats: YES] retain]; </code></pre> <p>This the notify_willResigneActive method contains:</p> <pre><code>if (alarmTicker) { [alarmTicker invalidate]; [alarmTicker release]; alarmTicker = NULL; } if (clockTicker) { [clockTicker invalidate]; [clockTicker release]; clockTicker = NULL; } </code></pre> <p>The problem is that when I debug this on the second timer invalidate I get the error. The weird thing is that if I switch the orders of the timers (like first invalidate the clockTicker).. I still got the error on the second timer.</p> <p>What could I be doing wrong?</p> <p>Thanks, Leonardo </p>
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