UIView实现红黑棋盘

//  Created by 妖精的尾巴 on 15-8-15.

//  Copyright (c) 2015年 妖精的尾巴. All rights reserved.

//

#import "ViewController.h"

#define kHeight 20

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

UIView* view=[[UIView alloc]initWithFrame:CGRectMake(0, kHeight, 320, 320)];

view.backgroundColor=[UIColor redColor];

[self.view addSubview:view];

for (int col=0; col<320; col+=40) {

for (int row=0; row<320; row+=40)

{

UIView* redView=[[UIView alloc]initWithFrame:CGRectMake(row, col, kHeight, kHeight)];

redView.backgroundColor=[UIColor blackColor];

[view addSubview:redView];

}

for (int row=20; row<320; row+=40)

{

UIView* redView=[[UIView alloc]initWithFrame:CGRectMake(row, col+kHeight, kHeight, kHeight)];

redView.backgroundColor=[UIColor blackColor];

[view addSubview:redView];

}

}

}