忙碌指示器UIActivityIndicatorView用法

1.初始化

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

[self.view addSubview:progress];

progress.frame = CGRectMake(160-15, 200-30, 30, 30);

[progress sizeToFit];

2.开始忙碌

[progress performSelectorOnMainThread:@selector(startAnimating) withObject:nil waitUntilDone:NO];

3.结束忙碌

[progress stopAnimating];