EXC_BAD_ACCESS error for -timeIntervalSinceNow

Question

Hoping someone can help with this. I keep getting a bad access error when trying to use the -timeIntervalSinceNow method. I have a variable in this class called NSDate *startDate and I've added @property (nonatomic, retain) NSDate *startDate;

startDate is used in the code here:

    startDate = [NSDate date];
    updateTimer = [NSTimer scheduledTimerWithTimeInterval:0.1 
                                                   target:self
                                                 selector:@selector(updatePlaybackPosition:)
                                                 userInfo:nil
                                                  repeats:YES];
}

}

- (void)updatePlaybackPosition:(NSTimer *)timer {
   NSTimeInterval interval = [startDate timeIntervalSinceNow];

When the program reaches [startDate timeIntervalSinceNow] it gives a bad access error. From the other posts I've read on this topic, the answer usually seems to have something to do with retaining the date. So, I'm not sure what I'm missing. Any help would be much appreciated!

Answer 1

Your NSDate was auto released before the timer fired. updated: Make sure you use the property that you declared instead of the instance variable by using self.. That will handle the retaining for you properly.

self.startDate = [NSDate date];

and then

- (void)updatePlaybackPosition:(NSTimer *)timer {
   NSTimeInterval interval = [self.startDate timeIntervalSinceNow];