Question

I am making Quiz app in which i want to generate random numbers without repetition.
I have searched many things and got the idea but i think i am doing something wrong that’s why not getting correct output.

Here is the code that i used.

-(int)generater{

NSMutableArray *temp;
srand([[NSDate date] timeIntervalSince1970]);
r = 1 + (arc4random() % 11);

if ([temp count] ==0) {

    [temp addObject:[NSNumber numberWithInteger:questionnumber]];
    return r;

}
if ([temp count] >= 1 ){

    if (![temp containsObject:[NSNumber numberWithInteger:questionnumber]]) {

        return r;

    }
    else{

        int next=[self generater];
        return next;
    }
}
return r;
}  

For next Question,

-(void)askQuestion{

[self generater];

questionnumber = r;

NSInteger row = 0;
if(questionnumber == 1)
{
    row = questionnumber - 1;
}
else
{
    row = ((questionnumber - 1) * 11);
}

Can any one suggest me where i am wrong ?

Answer 1

    arryRandomNumber=[[NSMutableArray alloc]init];
    while (arryRandomNumber.count<12) {
    NSInteger randomNumber=1+arc4random()%12;
    if (![arryRandomNumber containsObject:[NSString stringWithFormat:@"%d",randomNumber]])       {
          [arryRandomNumber addObject:[NSString stringWithFormat:@"%d",randomNumber]];
     }
         continue;
    }
     NSLog(@"%@",arryRandomNumber);