删除UIScrollView的所有子视图的好方法是什么?

我有一个滚动视图,我需要在我的应用程序运行时经常重新加载内容。现在,我正在使用以下代码行删除子视图,然后再重新添加它们:

[scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

我应该用下面的代替吗?

scrollView.subviews = nil;

出于某种原因,上面(第一行)的代码似乎每运行16次应用程序就会崩溃一次。我是不是在某个地方泄露了记忆?以下方法获取视图数组、滚动条(它是一个常量)和方向。

编辑:

- (void)loadViews:(NSArray *)views IntoScroller:(UIScrollView *)scroller withDirection:(NSString *)direction{
//Set up the scrollView

[scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

if([direction isEqualToString:@"horizontal"]){
    scrollView.frame = CGRectMake(0, 0, 1024, 768);
    scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * [[NSNumber numberWithUnsignedInt:[views count]] floatValue], scrollView.frame.size.height);
}else if([direction isEqualToString:@"vertical"]){
    scrollView.frame = CGRectMake(0, 0, 1024, 768);
    scrollView.contentSize = CGSizeMake(scrollView.frame.size.width, scrollView.frame.size.height * [[NSNumber numberWithUnsignedInt:[views count]] floatValue]);
}

for (int i=0; i<[[NSNumber numberWithUnsignedInt:[views count]] intValue]; i++) {

    [[[views objectAtIndex:[[NSNumber numberWithInt:i] unsignedIntValue]] view] setFrame:scrollView.frame];

    if([direction isEqualToString:@"horizontal"]){
        [[[views objectAtIndex:[[NSNumber numberWithInt:i] unsignedIntValue]] view] setFrame:CGRectMake(i * [[views objectAtIndex:[[NSNumber numberWithInt:i] unsignedIntValue]] view].frame.size.width, 0, scrollView.frame.size.width, scrollView.frame.size.height)];//CGRectMake(i * announcementView.view.frame.size.width, -scrollView.frame.origin.x, scrollView.frame.size.width, scrollView.frame.size.height)];
    }else if([direction isEqualToString:@"vertical"]){
        [[[views objectAtIndex:[[NSNumber numberWithInt:i] unsignedIntValue]] view] setFrame:CGRectMake(0, i * [[views objectAtIndex:[[NSNumber numberWithInt:i] unsignedIntValue]] view].frame.size.height, scrollView.frame.size.width, scrollView.frame.size.height)];
    }

    [scrollView addSubview:[[views objectAtIndex:[[NSNumber numberWithInt:i] unsignedIntValue]] view]];
}

}