UIActivityIndicatorView不能通过frame来变大变小,可以用下面方法解决
UIActivityIndicatorView.png
self.activityView = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
self.activityView.center = CGPointMake(iconView.bounds.size.width / 2.0, iconView.bounds.size.height / 2.0);
CGAffineTransform transform = CGAffineTransformMakeScale(1.5, 1.5); // 变大变小调这里即可
self.activityView.transform = transform;
[iconView addSubview:self.activityView];
[self.activityView startAnimating];
