简单动画

1.系统自带的加载旋转风火轮效果

// 加载旋转的菊花效果[UIActivityIndicatorView实现加载风火轮效果]
// 无需设置frame
UIActivityIndicatorView *indicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
indicatorView.center = self.view.center;
[self.view addSubview:indicatorView];

// 将风火轮启动
[indicatorView startAnimating];

2.gif动画

// 创建显示图片的ImageView
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 100, 400, 200)];
    [self.view addSubview:imgView];
    // 创建一个存储图片的数组
    NSMutableArray *saveImageArray = [NSMutableArray array];
    for (int i = 1; i < 12; i++) {
        NSString *imageName = [NSString stringWithFormat:@"2288dce40fe3c6723acdba8bd7177c73－%d（被拖移）.tiff", i];
        UIImage *image = [UIImage imageNamed:imageName];
        [saveImageArray addObject:image];
    }
    // 设置GIF图片组
    imgView.animationImages = saveImageArray;
    // 设置播放速率
    imgView.animationDuration = 1.0f;
    // 设置播放次数(-1是无限播放)
    imgView.animationRepeatCount = -1;
    // 开启GIF动画
    [imgView startAnimating];