Ios 如何在页面滚动视图中随机化图像

我有12个图像，存储在一个数组中

我用它来输出图像

scrollView = [[UIScrollView alloc] init];
    CGRect scrollFrame;
    scrollFrame.origin.x = 0;
    scrollFrame.origin.y = 0;  
    scrollFrame.size.width = WIDTH_OF_SCROLL_PAGE;
    scrollFrame.size.height = HEIGHT_OF_SCROLL_PAGE;

    scrollView = [[UIScrollView alloc] initWithFrame:scrollFrame];
    scrollView.bounces = YES;
    scrollView.pagingEnabled = YES;
    scrollView.showsHorizontalScrollIndicator = NO;
    scrollView.delegate = self;
    scrollView.userInteractionEnabled = YES;

    NSMutableArray *slideImages = [[NSMutableArray alloc] init];
    [slideImages addObject:@"KODAK1.png"];
    [slideImages addObject:@"KODAK2.png"];
    [slideImages addObject:@"KODAK3.png"];
    [slideImages addObject:@"KODAK4.png"];
    [slideImages addObject:@"KODAK5.png"];
    [slideImages addObject:@"KODAK6.png"];
    [slideImages addObject:@"KODAK7.png"];
    [slideImages addObject:@"KODAK8.png"];
    [slideImages addObject:@"KODAK9.png"];
    [slideImages addObject:@"KODAK10.png"];
    [slideImages addObject:@"KODAK11.png"];
    [slideImages addObject:@"KODAK12.png"];

    srandom(time(NULL));
    int x = arc4random() % 12;
 for ( int i = 0 ;i<[slideImages count]; i++) {
        //loop this bit
        UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:i]]];
        imageView.frame = CGRectMake((WIDTH_OF_IMAGE * i) + LEFT_EDGE_OFSET, 0 , WIDTH_OF_IMAGE, HEIGHT_OF_IMAGE);
        [scrollView addSubview:imageView];
        [imageView release];
    }


    [scrollView setContentSize:CGSizeMake(WIDTH_OF_SCROLL_PAGE * ([slideImages count] +0), HEIGHT_OF_IMAGE)];
    [scrollView setContentOffset:CGPointMake(0, 0)];
    [self.view addSubview:scrollView];
    [self.scrollView scrollRectToVisible:CGRectMake(WIDTH_OF_IMAGE,0,WIDTH_OF_IMAGE,HEIGHT_OF_IMAGE) animated:YES]; 
    [super viewDidLoad]

scrollView=[[UIScrollView alloc]init]；
CGRect滚动框；
scrollFrame.origin.x=0；
scrollFrame.origin.y=0；
scrollFrame.size.width=滚动页面的宽度；
scrollFrame.size.height=滚动页面的高度；
scrollView=[[UIScrollView alloc]initWithFrame:scrollFrame]；
scrollView.bounces=是；
scrollView.PaginEnabled=是；
scrollView.showsHorizontalScrollIndicator=否；
scrollView.delegate=self；
scrollView.userInteractionEnabled=是；
NSMUTABLEARRY*SLIDEMAGES=[[NSMUTABLEARRY alloc]init]；
[幻灯片图像添加对象：@“KODAK1.png”]；
[幻灯片图像添加对象：@“KODAK2.png”]；
[幻灯片图片添加对象：@“KODAK3.png”]；
[幻灯片图片添加对象：@“KODAK4.png”]；
[幻灯片图片添加对象：@“KODAK5.png”]；
[幻灯片图片添加对象：@“KODAK6.png”]；
[幻灯片图片添加对象：@“KODAK7.png”]；
[幻灯片图片添加对象：@“KODAK8.png”]；
[幻灯片图像添加对象：@“KODAK9.png”]；
[幻灯片图像添加对象：@“KODAK10.png”]；
[幻灯片图片添加对象：@“KODAK11.png”]；
[幻灯片图片添加对象：@“KODAK12.png”]；
srandom（时间（空））；
int x=arc4random（）%12；
对于（int i=0；i您可以在每次创建NSMutableArray时对其进行“洗牌”：

 NSMutableArray *slideImages = [[NSMutableArray alloc] init];
 ...
 [slideImages shuffle];
 ...

因此，每次您都将以不同的顺序初始化UIScrollView

shuffle
不是SDK的一部分。有关示例实现，请：

无论您想在哪里使用shuffle

啊，这很好…谢谢…但当我尝试该代码时，它说shuffle对NSMutableArray没有响应。警告应该没有问题。无论如何，请查看我的编辑以了解如何删除该警告。您是否成功地使用了该命令？我已经完成了此操作，现在正在准备一些图像…将更新此命令（很快就有人问：）对不起，上周末我正忙着上网呢

@implementation NSMutableArray (Shuffling)

- (void)shuffle
{

  static BOOL seeded = NO;
  if(!seeded)
  {
    seeded = YES;
    srandom(time(NULL));
  }

    NSUInteger count = [self count];
    for (NSUInteger i = 0; i < count; ++i) {
        // Select a random element between i and end of array to swap with.
        int nElements = count - i;
        int n = (random() % nElements) + i;
        [self exchangeObjectAtIndex:i withObjectAtIndex:n];
    }
}

@end

@interface NSMutableArray (Shuffling)
   - (void)shuffle;
@end