iOS-Senior17-菊花风火轮(代码)

self.view.backgroundColor = [UIColor orangeColor];

    //加载旋转的菊花效果

    //无需设置frame[UIActivityIndicatorView实现要实现的风火轮效果]

    UIActivityIndicatorView *indicatorView = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

    indicatorView.center = self.view.center;

    [self.view addSubview:indicatorView];

    //将风火轮动起来

    [indicatorView startAnimating];