This took a while to debug.
I was getting a crash every time I quit a MapView in my Simulator. It turned out the problem code was this which is used to track the user’s location:
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[self.mapView.userLocation addObserver:self forKeyPath:@"location" options:(NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld) context:NULL]; |
The code I thought was taking care of this was here:
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- (void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self]; // other code } |
which wasn’t doing the job.
I needed to do this:
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- (void)dealloc { [self.mapView.userLocation removeObserver:self forKeyPath:@"location"]; // other code } |
Having said that Apple have introduced a new method as of iOS 5.0 that does this a lot more simply.
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- (void)setUserTrackingMode:(MKUserTrackingMode)mode animated:(BOOL)animated; |
and lots of gory SO details here:
http://stackoverflow.com/questions/2473706/how-do-i-zoom-an-mkmapview-to-the-users-current-location-without-cllocationmanag