SHIRandomArray.h

//
//  SHIRandomArray.h
//  logicObj_C
//
//  Created by tomyAmi on 2015/02/08.
//  Copyright (c) 2015年 tomyAmi. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface SHIRandomArray : NSObject
/**
 *  投げた分の数字をランダムに並び替える
 *
 *  @param number
 */
-(NSArray *)randomArray:(NSArray *)array;

-(BOOL)judgementArrary:(NSArray*)ary;

-(NSMutableArray*)insertNumber:(NSInteger)number;
@end

SHIRandomArray.m

//
//  SHIRandomArray.m
//  logicObj_C
//
//  Created by tomyAmi on 2015/02/08.
//  Copyright (c) 2015年 tomyAmi. All rights reserved.
//

#import "SHIRandomArray.h"

@implementation SHIRandomArray

-(NSArray *)randomArray:(NSArray *)array{
    NSMutableArray* ary = array.mutableCopy;
    for(NSInteger n = 0; n < array.count;n++){
        NSInteger random = arc4random() % array.count;
        [ary exchangeObjectAtIndex:n withObjectAtIndex:random];
    }
    return ary.mutableCopy;
}

/*********************************************
 *
 * TEST CODE
 *
 *
 */
-(BOOL)judgementArrary:(NSArray*)ary{
    BOOL bo = NO;
    for(NSInteger i=0;i<ary.count;i++){
        int count = 0;
        for(NSInteger n = 0;n<ary.count;n++){
            if([ary[n]integerValue]==[ary[i]integerValue]){
                count++;
                if(count==2){
                    bo = YES;
                }
            }
        }
    }
    if(bo==YES)NSLog(@"\n BUSTED \n");
    return bo;
}

-(NSMutableArray*)insertNumber:(NSInteger)number{
    NSMutableArray* array = [NSMutableArray array];
    for(NSInteger i = 0; i<number;i++){
        [array addObject:[NSNumber numberWithInteger:i]];
    }
    return array;
}

@end

create random array