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POMemory leak vs Zombie - iPhone
 

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  1. POMemory leak vs Zombie - iPhone
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    <p>My iPhone app is either crashing due to to a zombie, or leaking memory.. I've narrowed it down to 3 lines of code and can reliably get one of the two things to happen by commenting/uncommenting the code. The bugs occur when navigation between a list of results (tableView) and a details page containing a map and a few labels, memory leak happens the first time I navigation from the map back to the list of results, the zombie occurs after maybe 5/6 times navigating to different results and back.</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; #import &lt;MapKit/MapKit.h&gt; #define METERS_PER_MILE 1609.344 @interface ResDetailsPageVC : UIViewController &lt;MKMapViewDelegate, UIAlertViewDelegate&gt; { UISegmentedControl *mapTypeSwitcher; MKMapView *mapView; UILabel *nameLabel; UIButton *addressLabel; UILabel *telephoneLabel; NSString *address; } @property (nonatomic, retain) IBOutlet UISegmentedControl *mapTypeSwitcher; @property (nonatomic, retain) IBOutlet MKMapView *mapView; @property (nonatomic, retain) IBOutlet UILabel *nameLabel; @property (nonatomic, retain) IBOutlet UIButton *addressLabel; @property (nonatomic, retain) IBOutlet UILabel *telephoneLabel; - (IBAction)segmentedControlIndexChanged; - (IBAction)callButtonClick; - (IBAction)addressClick; - (void) callNumber; @end @synthesize mapView; @synthesize mapTypeSwitcher; @synthesize nameLabel, addressLabel, telephoneLabel; - (void)dealloc { // if these lines are commented out - memory leak // if not - zombie?! /*self.telephoneLabel = nil; self.addressLabel = nil; self.nameLabel = nil;*/ self.mapView = nil; self.mapTypeSwitcher = nil; [super dealloc]; } </code></pre>
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    1. USevilunix
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    1. CODid you put the retains in there? Because IBOutlets are links to object in a xib, so they don't need to be retained. Usually they are `assign`ed or in the case of ARC code `__unsafe_unretained` or `weak`.
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      1. USAbizern
    2. COI tried changing the properties to (nonatomic, assign) and then not deallocating or setting them to nil in dealloc but still get the zombie.
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      1. USevilunix
    3. COYou keep saying you have zombies - that usually gives you more information, such as what object is sending the messages.
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      1. USAbizern
 

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