access an array within a structure

Question

I am having trouble in accessing an array within a structure. How can I access an array which is stored in a structure ? I have a structure, say,

@interface FoodDriveRow : NSObject
{
NSMutableArray *teamData;
}
@property (nonatomic , retain) NSMutableArray *teamData;
@end

FoodDriveRow *row ;

now I want to access the array.

Edit

@interface TeamRow : NSObject
{
NSString *membername;
NSString *email;
NSString *phone;    
}
@property (nonatomic , retain) NSString *membername;
@property (nonatomic , retain) NSString *email;
@property (nonatomic , retain) NSString *phone;
@end

I am trying to store an object of TeamRow in to the array by

[row.teamData insertObject:tRow atIndex:tIndex1];

and want get the values from the array.

Thanks...

I think you need to learn more about Objective-C and Cocoa before asking such questions. — dreamlax
– dreamlax, Commented Apr 6, 2011 at 12:52

Sabobin · Accepted Answer · 2011-04-06 13:00:21Z

4

You need to allocate the array, at the moment your array has a nil value.

Impliment -(id)init

Then within that you want to allocate your array and add some objects to it:

teamData = [[NSMutableArray alloc] init];
TeamRow *teamRow = [[TeamRow alloc] init]; 
[teamData addObject:teamRow];
[teamRow release];

Now you can access objects:

TeamRow *retrievedTeamRow = [teamData objectAtIndex:0];

edited Apr 6, 2011 at 13:00

answered Apr 6, 2011 at 12:50

Sabobin

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Comments

Jhaliya - Praveen Sharma · Accepted Answer · 2011-04-06 12:54:53Z

3

FoodDriveRow* myDriveRow;

Use it as below , lets suppose you store NSString object in array

For Adding

- (void)addObject:(id)anObject

[myDriveRow.teamData  addObject:myString];

For Removing

(void)removeObject:(id)anObject

For Accessing

- (id)objectAtIndex:(NSUInteger)index

edited Apr 6, 2011 at 12:54

answered Apr 6, 2011 at 12:49

Jhaliya - Praveen Sharma

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2 Comments

Maulik Over a year ago

ya thats true I can store values by [row.teamData insertObject:tRow atIndex:tIndex]; but I want to fetch the values from it

Jhaliya - Praveen Sharma Over a year ago

@maulik : Use --> myObjectStoredInArray = [row.teamData objectAtIndex:tIndex];

jdmunro · Accepted Answer · 2011-04-06 12:53:20Z

2

Did you try [row.teamData objectAtIndex:0] or from within the class itself, [self.teamData objectAtIndex:0]?

answered Apr 6, 2011 at 12:53

jdmunro

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Comments

visakh7 · Accepted Answer · 2011-04-06 12:48:17Z

1

I am not sure I understand you but I think you can do this by row.teamData

answered Apr 6, 2011 at 12:48

visakh7

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2 Comments

Maulik Over a year ago

by row.teamData I could not access the value of an array at specific index

visakh7 Over a year ago

[row.teamData objectAtIndex:indexValue]; will get you that

badgerr · Accepted Answer · 2011-04-06 12:51:44Z

1

[[row teamData] objectAtIndex: i];

where i is the index in the array.

answered Apr 6, 2011 at 12:51

badgerr

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Comments

FreeAsInBeer · Accepted Answer · 2011-04-06 12:54:13Z

1

This isn't a structure (struct) that you are referring to, it's a class called FoodDriveRow that descends directly from NSObject. In order to access properties from an object, you can use the old style:

[[row teamData] objectAtIndex:i]

Or you can use the new dot syntax:

[row.teamData objectAtIndex:i]

answered Apr 6, 2011 at 12:54

FreeAsInBeer

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