Singleton.m

gistfile1.m

#import "SingletonClass.h"
#import "ViewController.h"
 
@implementation SingletonClass
 
@synthesize locationManager;
@synthesize startLocation,stopLocation;
@synthesize testStr;
 
//static SingletonClass *sharedManager = nil;
 
#pragma mark Singleton Methods
 
/*+ (SingletonClass *)sharedManager {
    static SingletonClass *sharedManager = nil;
    if (sharedManager == nil) {
        sharedManager = [[super allocWithZone:NULL] init];
    }
    
    return sharedManager;
}*/
 
+(SingletonClass *)sharedManager
{
   static SingletonClass *sharedManager = nil;
    if (sharedManager !=nil)
    {
        return sharedManager;
    }
    static dispatch_once_t pred;        
    dispatch_once(&pred, ^{
        sharedManager = [SingletonClass alloc];
        sharedManager=[sharedManager init];
    });
         
   return sharedManager;
}
 
- (id)init
{
    self = [super init];
    
    if (self)
    {
       
        testStr = [[NSString alloc] initWithString:@"String from Singleton Class, Hello!"];
    }
    
    return self;
}
 
-(void)dealloc
{
    // I'm never called!
    [locationManager release];
    [stopLocation release];
    [startLocation release];
    [testStr release];
    [super dealloc];
}
 
 
+ (id)allocWithZone:(NSZone*)zone {
    return [[self sharedManager] retain];
}
 
- (id)copyWithZone:(NSZone *)zone {
    return self;
}
 
- (id)retain {
    return self;
}
 
- (NSUInteger)retainCount {
    return NSUIntegerMax;
}
 
- (oneway void)release {
    
}
 
- (id)autorelease {
    return self;
}
 
@end