Initialize 2 dim array NSMutableArray - iphone

Question

For C I would init an array like this:
NSInteger x[3][10]; That works.
Below I have a one dim array that works. Would like to move all of this to a 2 dim array, How do I init it? So in other words take the code below and make it work with 2 dimensions.
NSMutableArray *SRData;
SRData = [[NSMutableArray alloc] init];
NSMutableDictionary *SRRow;
SRRow = [[NSMutableDictionary alloc] init];
[SRRow setObject:#"Read" forKey:#"Descr"];
[SRRow setObject:#"Read2.png" forKey:#"Img"];
[SRRow setObject:#"Read the codes" forKey:#"Det"];
[SRData addObject:SRRow] ;
[SRRow release];

Answer 1

In Objective-C, you just have to have an array of arrays to get the second dimension. To my knowledge, there is no shorthand, so you're stuck doing something like the following:
NSMutableArray *firstDimension = [[NSMutableArray alloc] init];
for (int i = 0; i < rows; i++)
{
NSMutableArray *secondDimension = [[NSMutableArray alloc] init];
[firstDimension addObject:secondDimension];
}
So all you would do is add your other objects (in your case, the NSMutableDictionarys) to the secondDimension array. Usage would be like:
[[firstDimension objectAtIndex:0] objectAtIndex:0];
Edit
Full code example:
NSMutableArray *SRData = [[NSMutableArray alloc] init]; //first dimension
NSMutableArray *SRRow = [[NSMutableArray alloc] init]; //second dimension
[SRData addObject:SRRow]; //add row to data
[SRRow release];
NSMutableDictionary *SRField = [[NSMutableDictionary alloc] init]; //an element of the second dimension
[SRField setObject:#"Read" forKey:#"Descr"];
//Set the rest of your objects
[SRRow addObject:SRField]; //Add field to second dimension
[SRField release];
Now, to get at that "field" you would use code such as the following:
[[SRData objectAtIndex:0] objectAtIndex:0]; //Get the first element in the first array (the second dimension)