Accessing Array of NSMutableArray

Question

I have declared a NSMutable Array with 50 size. As i want to use each index as an array and add data separately. e.g i want to add 10 object to first Index 5 to next and so on. Is this the right way to do it? Please help me out if there is an alternate way.The sdk gives me error at line 5 saying 'Cannot convert to a pointer type'.

NSMutableArray *myArray[50];    
@property (nonatomic, retain) NSMutableArray *myArray;            
@dynamic myArray; 
for (int i = 0; i < count; i++)     
{                                   
    myArray[i] = [NSMutableArray alloc];         
}

PresentationSlides[i] addObject:string];

My problem is how can i reach to a specific index.if i use this.

for (int i = 0; i < count; i++)     
{                                   
myArray = [NSMutableArray array];    
}         
[myArray objectAtIndex:i ??????

What else? I am stuck in the projet after completing 90% of it. And there is no use of it if i couldnt complete it.

I think you are confusing C arrays for Objective-C NSArrays. — BoltClock
– BoltClock, Commented Dec 6, 2010 at 21:51
@BoltClock i am sure you have understand what i am trying to do. So can u suggest me a better way. Any optimized solution — Taimur Ajmal
– Taimur Ajmal, Commented Dec 6, 2010 at 21:58
@T. A.: Are you trying to have a C array of 50 NSMutableArrays or an NSMutableArray of 50 objects or what? — BoltClock
– BoltClock, Commented Dec 6, 2010 at 22:00

Graham Perks · Accepted Answer · 2010-12-06 22:06:31Z

2

You'll have to allocate myArray:

myArray = [NSMutableArray arrayWithCapacity:50];

Then for line 5, in the loop, 'alloc' alone isn't enough. Try:

[myArray insertObject:[[NSMutableArray alloc] initWithCapacity:10] atIndex:i];

edited Dec 6, 2010 at 22:06

answered Dec 6, 2010 at 22:01

Graham Perks

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2 Comments

Taimur Ajmal Over a year ago

Thats terrific , Now can u tell me , how to access ) 0th index of myArray. As the 0th index is itself an array so how can i then traverse in that 0th index. while(1) { [myArray objectAtindex:i++]; } This code will move the index of myArray i want to move at the indexes of 0th array which are 10.

bbum Over a year ago

[[myArray objectAtIndex: 0] objectAtIndex: 42];

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