IOS开源项目--僵尸来袭

僵尸来袭的画面大家有没有想过。那么如果如何通过OC来实现呢。闲来无事写了一个开源项目放到github共享。下面一起分析一下核心代码。网上找来4张图片。每张图片里面有8个僵尸。我们需要切图来把8个僵尸放到一个数组中，然后使用数组动画。我们需要一个僵尸类，下面有4个子类。每一种僵尸有自己的奔跑速度。这又涉及到继承和派生的概念。还需要引入定时器。
软件结构如下：

viewController中随机出僵尸

- (void)viewDidLoad {    [super viewDidLoad];    self.zombs = [NSMutableArray array];    //    for (NSInteger i = 0; i < 100; i++) {    //        Zomb *z = [[Zomb alloc]initWithFrame:CGRectMake(arc4random()%300, arc4random()%600, 30, 50)];    //        [z beginAnimation];    //        [self.view addSubview:z];    //    }    [NSTimer scheduledTimerWithTimeInterval:.1 repeats:YES block:^(NSTimer * _Nonnull timer) {        int type = arc4random()%4;        Zomb *zomb = nil;        switch (type) {            case 0:                zomb = [[ZombA alloc]initWithFrame:CGRectMake(375, arc4random()%600, 30, 50)];                break;            case 1:                zomb = [[ZombB alloc]initWithFrame:CGRectMake(375, arc4random()%600, 30, 50)];                break;            case 2:                zomb = [[ZombC alloc]initWithFrame:CGRectMake(375, arc4random()%600, 30, 50)];                break;            case 3:                zomb = [[ZombD alloc]initWithFrame:CGRectMake(375, arc4random()%600, 30, 50)];                break;        }        [zomb beginAnimation];        [self.view addSubview:zomb];        [self.zombs addObject:zomb];    }];

僵尸类中,切图，并组成僵尸动画

-(void)beginAnimation{    UIImage *zombImage = [UIImage imageNamed:self.zombImage];    NSMutableArray *zombImages = [NSMutableArray array];    float w = zombImage.size.width/8;    float h = zombImage.size.height;    for (NSInteger i = 0; i < 8; i++) {        CGImageRef subImage = CGImageCreateWithImageInRect(zombImage.CGImage, CGRectMake(i*w, 0, w, h));        UIImage *image = [UIImage imageWithCGImage:subImage];        [zombImages addObject:image];        //释放图片资源        CGImageRelease(subImage);    }    //开启每个僵尸的动画    self.animationImages = zombImages;    self.animationDuration = 1;    self.animationRepeatCount = 0;    [self startAnimating];}

实现效果如下：

所有源代码以及图片请在github下载：
https://github.com/lee727n/zombie-wave