Solved

Objective C - (id) type not accepting (int)

Posted on 2013-01-21
6
961 Views
Last Modified: 2016-02-29
Learning Objective C. Attempting to create an initialization method:

//Code from Fraction.m
#import "Fraction.h"

@implementation Fraction

@synthesize numerator, denominator;

-(id) init
{
       return [self initWith: 0 over: 0];
}

-(Fraction *) initWith: (int) n over: (int) d
{
    self = [super init];
   
    if (self)
    {
        [self setTo: n over: d];
    }
   
    return self;    
}

Error Message before compiling:

//From main.m

Fraction *a, *b;

a = [[Fraction alloc] initWith: 7 over: 17];       //This line causes the Error Message below.

Error Message: "Implicit conversion of 'int' to 'id' is disallowed with ARC.
0
Comment
Question by:jbotts
  • 3
  • 2
6 Comments
 
LVL 14

Expert Comment

by:binaryevo
ID: 38805510
The issue is simple, init methods need to return self.  Your not doing that in your initwith method signature, your returning Fraction *.  The fraction * is a pointer in memory.  Change -(fraction *) to -(id) and see if that works for you.  Hope this helps!
0
 

Author Comment

by:jbotts
ID: 38806452
I changed the return type to (id) but got the same result. The only way I have been able to make this work is by not using the ARC. Thanks for the response.

Jim
0
 
LVL 14

Accepted Solution

by:
binaryevo earned 500 total points
ID: 38806972
Well not using ARC isnt an option, we will see if we can get your code to work... :-)  Is the initWith exposed in your interface / .h file?

I reproduced your issue and looked at where i was doing similar init methods and this is how im achieving the same thing:

Header / .h
@interface MenuModel : NSObject

@property (nonatomic, retain) NSMutableDictionary *menuItems;
@property (nonatomic, retain) NSMutableArray *keys;
@property (nonatomic, retain) NSMutableArray *menuSectionImages;

-(id)initWithIntegers:(int)n over:(int)d;    // Your Init Code

@end  

Open in new window



Implementation / .m
#import "MenuModel.h"

@interface MenuModel()



@end

Open in new window


@implementation MenuModel

-(id)init
{
    return self;
}

-(id)initWithIntegers:(int)n over:(int)d
{
    return self;
}

@end

Open in new window


Caller / Instantiator

MenuModel *model = [[MenuModel alloc] initWithIntegers:7 over:17];

Open in new window

0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 33

Expert Comment

by:pgnatyuk
ID: 38808970
I think, you forgot to add #import "Fraction.h" in main.m file.
0
 

Author Comment

by:jbotts
ID: 38815114
Binaryevo, thanks for the response. Sorry I am so late in responding. I was traveling. I have in the Fraction.h file the following code:

-(id) init;
-(id) initWith (int) n: over (int) d;

I changed the implementation code but still get the same message as mentioned in the question.

pgnatyuk: I have the #import Fraction.h in the main file.


Thanks...
0
 

Author Comment

by:jbotts
ID: 38815780
After double check of the code, I found the error:
In the header file:

-(id) initWith: (int) n over: d;

Should have been:

-(id) initWith: (int) n over: (int) d;
Thanks so much for the help.

JSB
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Are Cydia and Jailbreak legal? 9 74
Apple iPhone Apps 3 457
iOS app crashing 3 560
Can downloading apps on an iPhone cause the battery to lose its charge fast? 2 244
Preface   In the first 100 days of the Macintosh release in January 1984, Apple sold 72,000 of the computers. Relatively cheap, easy-to-use personal computer with a graphical operating system. I've never seen this model. I did see this one:   …
Do you come here a lot? Are you lazy like me and don't want to go through the "trouble" of having to click your Dock's Safari icon and then having to click your Experts Exchange Favorites bookmark to get here? Well then this article is for you.
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question