Question

here is code

+ (SalesCollection*)sharedCollection {
@synchronized(self) {
    if (sharedInstance == nil) {
        [[self alloc] init]; // assignment not done here
    }
}
return sharedInstance;

}

+ (id)allocWithZone:(NSZone *)zone {
@synchronized(self) {
    if (sharedInstance == nil) {
        sharedInstance = [super allocWithZone:zone];
        return sharedInstance;  // assignment and return on first allocation
    }
}
   return nil; //on subsequent allocation attempts return nil
}
 - (id)copyWithZone:(NSZone *)zone {
     return self;
}
 - (id)retain {
  return self;
 }

- (unsigned)retainCount {
    return UINT_MAX;  //denotes an object that cannot be released
 }

- (void)release {
 /* Problem in Here */
    [myDict release];
sharedInstance = nil;
[sharedInstance release];
 }

 - (id)autorelease {
  return self;
 }

 // setup the data collection
  - init {
if (self = [super init]) {
    [self setupData];
}
return self;
  }

and here my .h file

@interface MyCollection : NSObject {
NSMutableDictionary *myDict;
}

@property (nonatomic,retain) NSMutableDictionary * myDict;
+ (MyCollection*)sharedInstance ;
- (void)setupData;

and i have one NSMutableDictionary (myDict) which contains array of object.
now my problem is i want to refresh this data on button click. so i am releasing this instance in – (void)release method then try to Init again but that creates lots of leaks because may it does not release array of objects form the myDict
so how to achieve this. i follow same example “TheElement” from apple to create singleton.

Thanks

Answer 1

i found a way…here is what i was doing

[self performSelectorInBackground:@selector(refreshData:) withObject:overlayView];

then i wrap up refreshData within autoreleasepool like this

NSAutoreleasePool *arPool = [[NSAutoreleasePool alloc] init];
[[MyCollection sharedCollection] refresh];
[arPool release];

and suddenly all leaks are gonna..it work like charm …..( :)))) )