//等待登陆菊花初始化:
UIActivityIndicatorView *ActivityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
//设置菊花的中心点,貌似不能设置菊花的大小,系统自带的有三种样式

ActivityIndicator.center = CGPointMake(100, 100);
//添加菊花
[self.view addSubview:ActivityIndicator];
//在某个地方设置其 ,开始旋转动画
    [ActivityIndicator startAnimating];
//菊花停止旋转
[ActivityIndicator stopAnimating];
//菊花隐藏
[ActivityIndicator setHidesWhenStopped:YES];

 

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