对字典进行排序生成sign令牌加密的时候使用

NSDictionary*params=@{@"v":@"1.2",@"suk":@"vod",@"type":@"2",@"from":@"ios",@"aoe":@"tt01",@"tyot":@"top5"};
    
    NSArray*keyArray=[params allKeys];
    
    //将键进行排序
    NSArray *sortArray = [keyArray sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {
        return [obj1 compare:obj2 options:NSNumericSearch];
    }];
    

    NSLog(@"sortKeyArr->%@",sortArray);
    
    //根据键获取对应的值进行排序
    NSMutableArray *valueArray = [NSMutableArray array];
    for (NSString *sortString in sortArray) {
        [valueArray addObject:[params objectForKey:sortString]];
    }

    NSLog(@"sortValueArr->%@",valueArray);
    
    //键值对拼接成数组
    NSMutableArray *signArray = [NSMutableArray array];
    for (int i = 0; i < sortArray.count; i++) {
        NSString *keyValueStr = [NSString stringWithFormat:@"%@:%@",sortArray[i],valueArray[i]];
        [signArray addObject:keyValueStr];
    }

    NSLog(@"signArray->%@",signArray);
    
    
    NSString*paramStr2=@"aoe=tt01&from=ios&suk=vod&tyot=top5&type=2&v=1.2";

    //将数组拆分成字符串进行&拼接
    NSString *sign = [signArray componentsJoinedByString:@"&"];

    NSLog(@"%@",sign);
    //将数组中的':'替换成'='号
    NSString*replaceArr=[sign stringByReplacingOccurrencesOfString:@":" withString:@"="];
    NSLog(@"%@",replaceArr);

    NSArray *array = [NSArray arrayWithObjects:@"z",@"2", @"3", @"1", @"4",@"b",@"a",@"c", nil];
    
    // 返回一个排好序的数组，原来数组的元素顺序不会改变
    // 指定元素的比较方法：compare:
    NSArray *array2 = [array sortedArrayUsingSelector:@selector(compare:)];
    NSLog(@"array2:%@", array2);
    
    
    
    NSMutableArray *p = [[NSMutableArray alloc] initWithObjects:@"S1",@"S14",@"S14",@"S4",@"S12",@"S6",@"S7",@"S8",@"S9",@"S10",@"S11",@"S5",@"S13",@"S2",nil];
    
    [p sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        NSString *a = (NSString *)obj1;
        NSString *b = (NSString *)obj2;
        
        int aNum = [[a substringFromIndex:1] intValue];
        int bNum = [[b substringFromIndex:1] intValue];
        
        if (aNum > bNum) {
            return NSOrderedDescending;
        }
        else if (aNum < bNum){
            return NSOrderedAscending;
        }
        else {
            return NSOrderedSame;
        }
    }];
    
    NSLog(@"p %@", p);