Question

I m trying to show a database information in a tableview and then the detailed information in a view my problem is as follow:

I created a NSMutableArray: NSMutableArray *myArray = [[NSMutableArray alloc]init]; Then I populated it form a database MyObj *obj = [[MyObj alloc]initWithName:idObj];

When I show the values in the tableview cellForRowAtIndexPath: method everything goes fine, but when I try to load the same array in the didSelectRowAtIndexPath: method, the values in the arrays are "invalid".

The NSMutableArray declaration is as follow:

@property (nonatomic, retain) NSMutableArray *myArray;

Here is the code:

.h file

NSMutableArray *antrosArray; 

@property(nonatomic, retain) NSMutableArray *antrosArray;

.m file

@synthesize antrosArray; 

//filling the array: 

Antro *antro = [[Antro alloc]initWithName:idAntro nombre:aName]; 
[self.antrosArray addObject:antro];

my problem is:

when I access the array from the cellForRowAtIndexPath: tableView methods, everything goes ok, but when the user selects a record I tried to read the array in the didSelectRowAtIndexPath: method and all the values in my array are invalid.

The array is there, and also the object, but the values for the objects are empty, the cellForRowAtIndexPath: method is cleaning the array.

Answer 1

It seems that you are defining a second local variable called myArray. What you should do instead is

self.myArray = [[[NSMutableArray alloc] init] autorelease];

As a matter of fact, you should probably be using -initWithCapacity: instead as well, but that s another matter.

Edit: Thanks Chuck for pointing out my missing autorelease :)

Answer 2

Use retain during definition as well.

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