#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    int arr[4][4]={
        1,0,0,0,
        0,1,0,0,
        0,0,1,0,
        0,0,0,1
    };
    NSMutableArray *varray=[[NSMutableArray alloc]init];//创建一个动态的数组
    for (int i=0; i<16; i++)  //在数组中有十六个方块
    {
        int row =i/4;    //想要的数字在那一行
        int column=i%4;//想要的数字在那一列
        UIView *v=[[UIView alloc]initWithFrame:CGRectMake(column*54, row*54, 50, 50)];  //创建一个方块并把它用指针v来代替；创建后并设定了他的坐标
        [varray addObject:varray];
        [self.view addSubview:v];//在显示平面显示
    }
    for (int row=0; row<4; ++row)
    {
        for ( int column=0;column<4;++column)
        {
            UIView *v=varray[row*4+column];
            if (arr[row][column])
            {
                v.backgroundColor=[UIColor redColor];
            
                
            }
            else{
                v.backgroundColor=[UIColor clearColor];
                }
        }
    
    }

创建几个小方块