Adding integer values as contents of an array,iphone

Question

I need to store some integer values as the contents of an array. But when i try to do so, it throws a warning, passing argument 1 of 'addObject' makes pointer from integer without a cast. And obviously the value is not stored in the array. Here's thecode.

NSUInteger i;
for (i=0;i<5;i++){
 [array addObject:i];}

kennytm · Accepted Answer · 2010-02-03 07:03:38Z

10

NSArray-s cannot store non-id objects. You have to box it into an NSNumber:

NSUInteger i;
for (i=0;i<5;i++) {
   [array addObject:[NSNumber numberWithUnsignedInteger:i]];
}

or use a CFArray with custom callbacks (but you sacrifice readability for performance), or use std::vector<NSUInteger> (but you need to use Objective-C++).

answered Feb 3, 2010 at 7:03

kennytm

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3 Comments

kennytm Over a year ago

@Nithin: You can get an NSUInteger from an NSNumber with -unsignedIntegerValue.

Nithin Over a year ago

pls give an example for that.

Kendall Helmstetter Gelner Over a year ago

NSUInteger anInt = [[array objectAtIndex:0] unsignedIntegerValue];

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