This sample code generates a random number and checks whether its already present in the array.
If yes then it will not add else it will add, thus generating a random array without duplicates.
-(NSMutableArray *) generateRandomArray : (int) max{ NSMutableArray *randArray = [NSMutableArray new]; for (int k = 0; k < max; k++) { int r = arc4random() % max; if([randArray containsObject:[NSString stringWithFormat:@"%d", r]]){ k--; }else{ [randArray addObject:[NSString stringWithFormat:@"%d", r]]; } } NSLog(@"RAND %@",randArray); return randArray;} |
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