objective-c - 比较两个数组并将相等的对象放入新数组中

Question

如何比较两个 NSArray s 并将相等的对象放入新数组中？

Answer 1

NSArray *array1 = [[NSArray alloc] initWithObjects:@"a",@"b",@"c",nil];
    NSArray *array2 = [[NSArray alloc] initWithObjects:@"a",@"d",@"c",nil];
    NSMutableArray *ary_result = [[NSMutableArray alloc] init];
    for(int i = 0;i<[array1 count];i++)
    {
        for(int j= 0;j<[array2 count];j++)
        {
            if([[array1 objectAtIndex:i] isEqualToString:[array2 objectAtIndex:j]])
            {
                [ary_result addObject:[array1 objectAtIndex:i]];
                break;
            }
        }
    }
    NSLog(@"%@",ary_result);//it will print a,c