How to extract value from NSMutable array and put it in NSArray?

Question

I have NSMutableArray like following:

In .h

@property (nonatomic,retain) NSMutableArray *arrReceipes;

In .m

@synthesize arrReceipe;

Inside a method

arrReceipes = [[NSMutableArray alloc] init];    
NSArray *arrReceipesTime1;    
NSArray *arrReciepHeart;     
NSArray *arrRecipeLifestyle;     

arrReceipesTime1 = [NSArray arrayWithObjects:@"Half an hour or less",@"About an     hour",@"More than an hour", nil];     

NSDictionary *arrReceipeTime1Dict = [NSDictionary dictionaryWithObject:arrReceipesTime1 forKey:@"Find Recipes"];    

arrReciepHeart = [NSArray arrayWithObjects:@"HealthyAndDelicius", nil];    
NSDictionary *arrRecipesHeartDict = [NSDictionary dictionaryWithObject:arrReciepHeart   forKey:@"Find Recipes"];     

arrRecipeLifestyle = [NSArray arrayWithObjects:@"Recipe for fall",@"Quick and   easy",@"Cooking for kids",@"Easy entertaining",@"American classics",@"Outdoor cooking",   nil];     
NSDictionary *arrRecipeLifestyleDict = [NSDictionary dictionaryWithObject:arrRecipeLifestyle forKey:@"Find Recipes"];     

[arrReceipes addObject:arrReceipeTime1Dict];
[arrReceipes addObject:arrRecipesHeartDict];
[arrReceipes addObject:arrRecipeLifestyleDict];

That is "arrReceipes" is my NSMutable array.

Now I want to extract the value/string of "arrReceipes" and put it into "NSArray * somevariable".

How can I do this?

This I' doing for :

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"showRecipeDetail"]) {
       NSIndexPath *indexPath = [self.tableView1 indexPathForSelectedRow];
       RecipeDetailViewController *destViewController = segue.destinationViewController;

       destViewController.recipeName = [arrReceipes objectAtIndex:indexPath.row];
    }
}

In my 3rd line above(in 'if') if I'm giving "arrReceipes" its throwing exception in "main" method.But, if, instade of giving "arrReceipes" I'll give "somevariable" its working fine.

Hope you understand my problem.Please help.Thanks.

What exception is it throwing, and on what line?

Hot Licks
– Hot Licks

2012-12-05 18:31:10 +00:00
Commented Dec 5, 2012 at 18:31 — Hot Licks
– Hot Licks, Commented Dec 5, 2012 at 18:31

Phillip Mills · Accepted Answer · 2012-12-05 15:00:59Z

1

The objects that you're putting into arrReceipes are dictionaries, so the destViewController.recipeName should be a dictionary if you want to pass it one of those objects.

answered Dec 5, 2012 at 15:00

Phillip Mills

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4 Comments

AskMe Over a year ago

Hi Phillip, Could you please more elaborate.Give some example code.Thanks.

Phillip Mills Over a year ago

What part of "destViewController.recipeName should be a dictionary" don't you understand?

lnafziger Over a year ago

Or, (probably more likely) he needs to extract the recipe name from the dictionary and set the variable in the new view controller.

Phillip Mills Over a year ago

Certainly deciding what data type is to be passed would be a good step.

ppaulojr · Accepted Answer · 2012-12-05 15:01:41Z

0

You can't write in an NSArray.

However you can do something like this:

NSArray * somevariable = [arrReceipes copy];

Also you can modify your code to write the data into a NSMutableArray and then copy it to arrRecipes

answered Dec 5, 2012 at 15:01

ppaulojr

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4 Comments

Anoop Vaidya Over a year ago

give full answer, he cant use copy (ARC will create issue)

rckoenes Over a year ago

Why would copy give problems in ARC. I've just copy just fine in a project with ARC.

AskMe Over a year ago

I tryed doing:NSArray * somevariable = [arrReceipes copy]; But, this does not help.Its showing same exception.Any other solution??

Hot Licks Over a year ago

@Jyotiranjan - I've checked the iOS documentation again, and I still can't find a "same" exception.

k20 · Accepted Answer · 2012-12-05 18:11:36Z

0

You can try with

NSArray *somevariable = [NSArray arrayWithArray:arrReceipes];

NSMutableArray is a subclass of an NSArray so you can just use NSArray methods

answered Dec 5, 2012 at 18:11

k20

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