I've an NSMutableArray
as
self.valuesArray = [[NSMutableArray alloc]initWithObjects:[NSNumber numberWithInt: 0],[NSNumber numberWithInt: 0],[NSNumber numberWithInt: 0],[NSNumber numberWithInt: 0], nil];
As you can see it's initialized with 0
now If I want to increment 3
at index 2
how can I do it? I was trying to do it like
self.valuesArray[2] = [self.valuesArray objectAtIndex:2]+3;
but that's not the right way.
I've also tried doing this
[self.valuesArray[2] addObject:[NSNumber numberWithInt:[self.valuesArray[2] intValue]+3]];
but I got error that:
Unrecognized selector sent to instance
You should do like this it will work.
int valueInc = [[self.valuesArray objectAtIndex:2] intValue] + 2;
NSNumber *numberValue = [NSNumber numberWithInt:valueInc];
[self.valuesArray replaceObjectAtIndex:2 withObject:numberValue];
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