Question

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Non repeating random numbers in Objective-C

How to generate non repeating random numbers?

I saw this on many sites but they give in main.c file code.

When I use the main.c file the code working is fine, but when I try to convert in to my.m file it is not working.

example:

I need to get all the numbers between 0-10 randomly.and the numbers should not repeat again.

Answer 1

    NSMutableArray *storeArray = [[NSMutableArray alloc] init];    
    BOOL record = NO;
    int x;

    for (int i=0; [storeArray count] < 10; i++) //Loop for generate different random values
    {
        x = arc4random() % 10;//generating random number
        if(i==0)//for first time 
        {
          [storeArray addObject:[NSNumber numberWithInt:x]];  
        }
        else
        {
            for (int j=0; j<= [storeArray count]-1; j++) 
            {
                    if (x ==[[storeArray objectAtIndex:j] intValue]) 
                    record = YES;
            }

            if (record == YES) 
            {
                record = NO;
            }
            else
            {
                [storeArray addObject:[NSNumber numberWithInt:x]];
            }
        }
    }
    NSLog(@" Non Repeated Random Numbers : %@",storeArray);

can u try this code may be it’s use full to you