iOS, how to get subarray from an array using subarraywithRange

Question

I am having problem with using subArrayWithRange.

Basically, what I want to do is make subarray of 50 elements or less from mainArray for example if mainArray has 70 elements I want a sortedArray to have an array of first 50 elements in first index and another array of 20 elements in the last index of sortedArray

Hope I am clear what I want to do get.

anyway, my code is

for (int i=0; i<=ceilLoopCount; i++) {
    [sortedArray insertObject:[testArray subarrayWithRange:NSMakeRange(0,50)] atIndex:i]; 
}

and the problem I am having is I only get the same 50 elements in all the array

Please help, Pondd

score 14 · Accepted Answer · 2011-06-02 06:35:40Z

14

NSUInteger size = 50;

for (NSUInteger i = 0; i * size < [testArray count]; i++) {
  NSUInteger start = i * size;
  NSRange range = NSMakeRange(start, MIN([testArray count] - start, size));
  [sortedArray addObject:[testArray subarrayWithRange:range]];
}

edited Jun 2, 2011 at 6:35

answered Jun 2, 2011 at 6:06

user94896

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1 Comment

Suwitcha Sugthana Over a year ago

Hi Thankz for help but I am getting Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSArray subarrayWithRange:]: index 449 beyond bounds [0 .. 433]' Not sure what you meant by "- loc"

Oleh Kudinov · Accepted Answer · 2014-12-05 15:50:32Z

0

            NSMutableArray *arrayOfArrays = [NSMutableArray array];
            int batchSize = 30;

            for(int j = 0; j < [stuff count]; j += batchSize) {

                NSArray *subarray = [stuff subarrayWithRange:NSMakeRange(j, MIN(batchSize, [stuff count] - j))];
                [arrayOfArrays addObject:subarray];
            }

answered Dec 5, 2014 at 15:50

Oleh Kudinov

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