Question

I am developing an appplication in which i need timestamp.I have two arrays with string objects containing hours,minutes and seconds and i need to subtract those and put them in third arrays as hours,minutes and seconds as three objects.

example:

arr1=[9,10,22]
arr2=[10,12,42];

so the answer should be

arr3=[1,2,22]

and i need to put this array objects in a string separated by ' :'

Kindly help.

Answer 1

try this:

NSMutableArray *arr3 = [NSMutableArray alloc]init];
for(int i=0;i<[arr1 count];i++)
{
  [arr3 addObject:[NSString stringWithFormat:@"%d",[[arr2 objectAtIndex:i]integerValue]-[[arr1 objectAtIndex:i]integerValue]]];
}

NSString *combinedStr = [arr3 componentsJoinedByString:@":"];