Question

I have some class:

@interface SearchBase : NSObject
{
    NSString *words;
NSMutableArray *resultsTitles;
NSMutableArray *resultsUrl;
NSMutableArray *flag;
}

@property (copy, nonatomic) NSString *words;

- (id) getTitleAtIndex:(int *)index;
- (id) getUrlAtIndex:(int *)index;
- (id) getFlagAtIndex:(int *)index;
@end

@implementation SearchBase
 - (id) initWithQuery:(NSString *)words 
{
if (self = [super init])
{
    self.words = words;
}
return self;
}
- (id) getTitleAtIndex:(int *)index
{
return [resultsTitles objectAtIndex:index];
}

- (id) getUrlAtIndex:(int *)index
{
return [resultsUrl objectAtIndex:index];
}

- (id) getFlagAtIndex:(int *)index
{
return [flag objectAtIndex:index];
}
@end

But when I’m trying to use some these get-methods in subclass, I see:

warning: passing argument 1 of 'getTitleAtIndex:' makes pointer from integer without a cast 
warning: passing argument 1 of 'getFlagAtIndex:' makes pointer from integer without a cast
warning: passing argument 1 of 'getUrlAtIndex:' makes pointer from integer without a cast

And program isn’t work correctly. What’s wrong? How to fix it?

Answer 1

You are passing integer values to your methods which is wrong because the functions declared by you accept only integer pointer not value that’s the reason for having warning.and objectAtIndex: method accept only integer value not pointer so if you run, it could cause crash in your application.

The simplest solation would be changing the parameter type in your functions.

- (id) getTitleAtIndex:(int )index;
- (id) getUrlAtIndex:(int )index;
- (id) getFlagAtIndex:(int )index;

and function implementaion could be similar to below function.

- (id) getTitleAtIndex:(int )index
{
    if(index < [resultsTitles count] )
        return [resultsTitles objectAtIndex:index];
    else
       return nil;
}