뚱2's Story

shBrushObjc.zip

@interface AddressBookModel : NSObject
{
    NSMutableArray *aData;
}

@property (nonatomic, retain) NSMutableArray *aData;

+(AddressBookModel *)sharedInstance;
+(void)killInstance;
-(NSString*)print;
@end

static AddressBookModel *_addressBookModelSingleInstance = nil;

@implementation AddressBookModel : NSObject

@synthesize aData;

-(NSString*)print
{
    NSMutableString *str = [NSMutableString string];
    for (int i = 0; i < [aData count]; i++ )
    {
        [str appendFormat:@"%@ ", [aData objectAtIndex:i]];
    }
    
    return str;
}

-(id)init
{
    self = [super init];
    
    if ( self != nil ) 
    {
        // 데이터 초기화 장소
        self.aData = [NSMutableArray arrayWithObjects:@"1", @"2", @"3", @"4", nil];
    }
    
    return self;
}

-(void)dealloc
{
    NSLog(@"AddressBookModel dealloc=>Ref Count=%d", [self retainCount]);
    
    [aData release];
    [super dealloc];
}

+(AddressBookModel *)sharedInstance
{    
    @synchronized(self) 
    {
        if ( _addressBookModelSingleInstance == nil ) 
        {
            _addressBookModelSingleInstance = [[AddressBookModel alloc] init];
            NSLog(@"AddressBookModel sharedInstance=>Ref Count=%d", [_addressBookModelSingleInstance retainCount]);
        }
    }
    
    return _addressBookModelSingleInstance;
}

+(void)killInstance
{
    @synchronized(self)
    {
       if (_addressBookModelSingleInstance != nil )
       {
            [_addressBookModelSingleInstance dealloc];
            _addressBookModelSingleInstance = nil;
       }     
    }
}

+(id)allocWithZone:(NSZone *)zone {
    @synchronized(self) 
    {
        if (_addressBookModelSingleInstance == nil) 
        {
            _addressBookModelSingleInstance = [super allocWithZone:zone];
            return _addressBookModelSingleInstance;
        }
    }
    return nil;
}

-(id)copyWithZone:(NSZone *)zone {
    return self;
}

-(id)retain {
    return self;
}

-(unsigned)retainCount {
    return UINT_MAX;
}

-(oneway void)release {
}

-(id)autorelease {
    return self;
}

@end