通过target-action 实现关灯游戏

#import "LOAppDelegate.h"
#import "RootViewController.h"
@implementation LOAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
    RootViewController *rootVc = [[RootViewController alloc]init];
    self.window.rootViewController = rootVc;
    [self.window makeKeyAndVisible];
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end

#import "RootViewController.h"
#import "LightView.h"
@interface RootViewController ()

@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.view.backgroundColor = [UIColor grayColor];
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    CGFloat y = 60, x = 20;
    for (int i = 0; i < 5; i ++) {
        for (int j = 0; j < 5; j++) {
            LightView *light = [[LightView alloc]initWithFrame:CGRectMake(x, y, 50, 50) target:self action:@selector(changeColor:)];
            [self.view addSubview:light];
            light.tag = 100 + i * 10 +j;
            [light release];
            x += 60;
        }
        x = 20;
        y += 60;
    }
}
- (void)changeColor:(LightView *)light
{
    int a[4] = {-1, 1, 10 , -10};
    if (light.isColor) {
        light.backgroundColor = [UIColor blueColor];
        light.isColor = 0;
        for (int i = 0; i < 4; i++) {
            LightView *lightView = (LightView *)[self.view viewWithTag:light.tag + a[i]];
            if (lightView.isColor) {
                lightView.isColor = 0;
                lightView.backgroundColor = [UIColor blueColor];
            }else{
                lightView.backgroundColor = [UIColor yellowColor];
                lightView.isColor = 1;
            }
        }
    }
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

#import <UIKit/UIKit.h>

@interface LightView : UIView
@property (nonatomic, assign) id target;  // 设置操作对象
@property (nonatomic, assign) SEL action; // 实例操作方法
@property (nonatomic, assign) BOOL isColor;

// 在初始化方法的过程中设置target - frame
- (id)initWithFrame:(CGRect)frame target:(id)target action:(SEL)action;
@end

#import "LightView.h"

@implementation LightView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
    }
    return self;
}
- (id)initWithFrame:(CGRect)frame target:(id)target action:(SEL)action
{
    self = [super initWithFrame:frame];
    if (self) {
        self.target = target;
        self.action = action;
        self.isColor = true;
        // 自动生成代理颜色，进行操作
        NSInteger flag = arc4random() % 2;
        if (flag == 1) {
            self.backgroundColor = [UIColor yellowColor];
            self.isColor = 1;
        }else{
            self.backgroundColor = [UIColor blueColor];
            self.isColor = 0;
        }
    }
    return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 设置target对象执行相应的操作
    [_target performSelector:_action withObject:self];
}

@end

注意：只是上传了部分需要的代码，其他可用代码用自动生成的即可