如何在Objective-C中声明2D数组？

Question

I am new to iPhone. I tried a lot to declare 2D array but I am unable to get the result.

NSMutableArray *outerarray = [[NSMutableArray alloc] init];
outerarray = [NSMutableArray arrayWithObjects:
    [NSMutableArray arrayWithObjects:@"10-20","21-30","31-40","41-50","51-60","61-70","71-80","81-90","91-100",nil,
    [NSMutableArray arrayWithObjects:@"10-20","21-30","31-40","41-50","51-60","61-70","71-80","81-90","91-100",nil],
    nil];

I want to combine two arrays elements and compare it with other element.

Anyone can help me please?

Answer 1

@"..." is an NSString . "..." is not, it's a C string constant. You need to use the @"..." syntax for all NSString objects you're putting into an NSArray .

Answer 2

NS[Mutable]Array does not support 2D as far as I know. You can probably jury-rig it to mutate and access elements in 2D (make that its own class). Once you can access arbitrary elements, you can "combine" them and compare them as you need. The alternative is since Objective-C is a superset of C, its int arrayName [][] is available (but discouraged).