Singleton Trouble - Compiler Warning and App Crash

[PhoneKoke]

I was playing around with the concept of Singleton's so I can have some shared variables that I can use throughout the code. Being a noob to all of this I have run into the following compiler warning and crash of the program. I am guessing I have missed something critical in accessing MyShare but I'm not seeing it.

When I compile I get a warning...

MyShare *slideryear = [MyShare sharedStuff]; <- Compiler Warning here "Warning "MyShare" may not respond to +sharedStuff

This is where the program crashes and then in the Console I see

*** +[MyShare sharedStuff]: unrecognized selector sent to class 0x5118
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[MyShare sharedStuff]: unrecognized selector sent to class 0x5118'

Here's the code snippets. I based this off of some DerekNeely.com samples and some Apple pages. It has to be something really obvious that I have missed the concept. Thanks for any help in advance.

*************
MyShared.h
*************

#import <Foundation/Foundation.h>

@interface MyShare : NSObject {
 NSString *whatyearisit;	
}

@property (nonatomic, retain) NSString *whatyearisit;
+ (MyShare *)sharedManager;
@end

*************
MyShared.m
*************
#import "MyShared.h"

static MyShare *sharedStuff = nil;

@implementation MyShare
@synthesize whatyearisit;

#pragma mark -
#pragma mark Singleton Methods

+ (MyShare *)sharedManager {	
	if(sharedStuff == nil) {
		sharedStuff = [[super allocWithZone:NULL] init];
	}
	return sharedStuff;
}
+ (id)allocWithZone:(NSZone *)zone {
	return [[self sharedManager] retain];

// other general Singleton stuff not listed since that is not relevant  
...
...

*************
MySlideController.m
*************

#import "MySlideController.h"
#import "MyShared.h"

implementation MySlideController

- (IBAction)changeyearresults:(id)sender {
	 
	//setup the shared variable... and make sure it works
	MyShare *slideryear = [MyShare sharedStuff];   <- Compiler Warning here "Warning "MyShare" may not respond to +sharedStuff and then crash on execution.
	
	slideryear.whatyearisit = @"Not Determined Yet";
	...
	...
} @end

[Kalimba]

Originally Posted by PhoneKoke

I was playing around with the concept of Singleton's so I can have some shared variables that I can use throughout the code. Being a noob to all of this I have run into the following compiler warning and crash of the program. I am guessing I have missed something critical in accessing MyShare but I'm not seeing it.

When I compile I get a warning...

MyShare *slideryear = [MyShare sharedStuff]; <- Compiler Warning here "Warning "MyShare" may not respond to +sharedStuff

This is where the program crashes and then in the Console I see

*** +[MyShare sharedStuff]: unrecognized selector sent to class 0x5118
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[MyShare sharedStuff]: unrecognized selector sent to class 0x5118'

Here's the code snippets. I based this off of some DerekNeely.com samples and some Apple pages. It has to be something really obvious that I have missed the concept. Thanks for any help in advance.

*************
MyShared.h
*************

#import <Foundation/Foundation.h>

@interface MyShare : NSObject {
 NSString *whatyearisit;	
}

@property (nonatomic, retain) NSString *whatyearisit;
+ (MyShare *)sharedManager;
@end

*************
MyShared.m
*************
#import "MyShared.h"

static MyShare *sharedStuff = nil;

@implementation MyShare
@synthesize whatyearisit;

#pragma mark -
#pragma mark Singleton Methods

+ (MyShare *)sharedManager {	
	if(sharedStuff == nil) {
		sharedStuff = [[super allocWithZone:NULL] init];
	}
	return sharedStuff;
}
+ (id)allocWithZone:(NSZone *)zone {
	return [[self sharedManager] retain];

// other general Singleton stuff not listed since that is not relevant  
...
...

*************
MySlideController.m
*************

#import "MySlideController.h"
#import "MyShared.h"

implementation MySlideController

- (IBAction)changeyearresults:(id)sender {
	 
	//setup the shared variable... and make sure it works
	MyShare *slideryear = [MyShare sharedStuff];   <- Compiler Warning here "Warning "MyShare" may not respond to +sharedStuff and then crash on execution.
	
	slideryear.whatyearisit = @"Not Determined Yet";
	...
	...
} @end

Looks like you should be calling [MyShare sharedManager], rather than [MyShare sharedStuff], no?

[PhoneKoke]

Ahh.. egg on face.. Thank You. That will teach me to cut and paste examples that appear to have bugs.