ios - iPhone NSMutableArray and NSKeyedUnarchiver unarchiveObjectWithFile release oddity -

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i archive array (nsmutablearray) of custom objects implement . once load froma file retaining property @property (nonatomic, retain) nsmutablearray *buddies; release count of object 2 (correct, it's 1of autorelease + 1 of retain of property) noone releases , retain count becames 1, when release -[__nsarraym retaincount]: message sent deallocated instance (i think because 1 retain count autorelease)

here's full code:

buddielistviewcontroller.h

#import <uikit/uikit.h> #import "buddie.h"  @interface buddielistviewcontroller : uitableviewcontroller {     iboutlet nsmutablearray *buddies;     [...] } [...] @property (nonatomic, retain) nsmutablearray *buddies; [...] @end

buddielistviewcontroller.m

#import "buddielistviewcontroller.h" #import "buddie.h" #import "previewviewcontroller.h"  @implementation buddielistviewcontroller  @synthesize buddies; [...] - (id)initwithstyle:(uitableviewstyle)style {     self = [super initwithstyle:style];     if (self) {         [self loadfromdisk];     }     return self; }  - (void)loadfromdisk {     nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);     nsstring *documentspath = [paths objectatindex:0];     nsstring *appfile = [documentspath stringbyappendingpathcomponent:@"buddiearchive.ark"];     nsfilemanager *filemanager = [nsfilemanager defaultmanager];     if ([filemanager fileexistsatpath:appfile]) {         self.buddies = [nskeyedunarchiver unarchiveobjectwithfile:appfile];         nslog(@"1- buddies retain count %d (should 2, 1 + 1autorelease)", [buddies retaincount]);     } else {         self.buddies = [nsmutablearray arraywithcapacity:1];     } } [...] - (ibaction)cancelledbuddie:(nsnotification *)notification {     [editingbuddie release];     nslog(@"2- buddies retain count %d (should 2, 1 + 1autorelease)", [buddies retaincount]);     [buddies release];      [self loadfromdisk];     [self.tableview reloaddata]; }

has idea of why happens?

if need nullify array, use property accessor set nil:

self.buddies = nil;

the synthesized implementation takes care of memory management issues. try avoid sending -retain/-release messages directly instance variables wherever possible , instead allow property accessors take care of things you. it'll save lot of trouble.


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