1)Add Class which inherits NSObject 2)Implement following in YourSingleton.h #import <foundation/Foundation.h> @interface YourSingleton: NSObject { NSString *someProperty; } @property (nonatomic, retain) NSString *someProperty; + (id)sharedInstance; @end 3)In YourSingleton.m #import "YourSingleton.h" @implementation YourSingleton @synthesize someProperty; #pragma mark Singleton Methods + (id)sharedInstance{ static YourSingleton*sharedInstance= nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance= [[self alloc] init]; }); return sharedInstance; } - (id)init { if (self = [super init]) { someProperty = [[NSString alloc] initWithString:@"Default Property Value"]; } return self; } - (void)dealloc { // Should never be called, but just here for clarity really. } @end Its Done.....Now you can use it whenever you want. :) Note : Do not user for creating UIkitcomponent because reference of instance of sigleton are never released....

1)Add Class which inherits NSObject
2)Implement following in YourSingleton.h
                    

#import <foundation/Foundation.h>

@interface YourSingleton: NSObject {
    NSString *someProperty;
}

@property (nonatomic, retain) NSString *someProperty;

+ (id)sharedInstance;

@end

3)In YourSingleton.m

#import "YourSingleton.h"

@implementation YourSingleton

@synthesize someProperty;

#pragma mark Singleton Methods

+ (id)sharedInstance{
    static YourSingleton*sharedInstance= nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance= [[self alloc] init];
    });
    return sharedInstance;
}

- (id)init {
  if (self = [super init]) {
      someProperty = [[NSString alloc] initWithString:@"Default Property Value"];
  }
  return self;
}

- (void)dealloc {
  // Should never be called, but just here for clarity really.
}

@end
 

Its Done.....Now you can use it whenever you want. :)

Note : Do not user for creating UIkitcomponent because reference of instance of sigleton are never released....