iPhone循环递归按名称查找视图树

- (UIView*) findView:(UIView*)view
{
	Class clazz = [view class];
	NSString *desc = [clazz description];
	if ([desc compare:@"UIButton"] == NSOrderedSame)
	{
		return view;
	}
	
	for (UIView *sub in [view subviews])
	{
		if ([self findView:sub])
		{
			return sub;
		}
	}
	
	return nil;
}