iOS中的水平UIScrollView和数百个缩略图？ [英] Horizontal UIScrollView and hundreds of thumbnail images in iOS?

问题描述

我需要创建一个水平的UIScrollView，它可以容纳数百个缩略图，就像缩略图一样。

I need to create a horizontal UIScrollView which to hold hundreds of thumbnail images, just like a slide of thumbnails.

例如，在一个屏幕上会显示10个缩略图，每个缩略图彼此水平相邻。

For example, there will be 10 thumbnails showing in a single screen, each of them are horizontally adjacent to each other.

我的问题是我不知道如何制作一个水平UIScrollView来保存同时显示的多个缩略图？

My problem is that I don't know how to make a horizontal UIScrollView to hold the multiple thumbnails which showing at the same time ?

示例照片是如下。请参阅屏幕底部。

A sample photo is as below. See the bottom part of the screen.

谢谢。

推荐答案

你可以添加全部以编程方式缩略图到您的scrollview并使用UIScrollView的setContentSize方法。你必须在contentOffset中传递2个值。 1表示宽度，1表示高度。请按照链接进行详细了解。如果您需要进一步的帮助，请发表评论。

You can add all the thumbnails programatically to your scrollview and use the setContentSize method of UIScrollView. you have to pass 2 values in contentOffset. 1 for width and 1 for height. Please follow link to explore more on this. If you need further help please leave a comment.

希望有所帮助。

请考虑以下示例。

- (void)setupHorizontalScrollView
{
scrollView.delegate = self;

[self.scrollView setBackgroundColor:[UIColor blackColor]];
[scrollView setCanCancelContentTouches:NO];

scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView.clipsToBounds = NO;
scrollView.scrollEnabled = YES;
scrollView.pagingEnabled = YES;

NSUInteger nimages = 0;
NSInteger tot=0;
CGFloat cx = 0;
for (; ; nimages++) {
    NSString *imageName = [NSString stringWithFormat:@"image%d.jpg", (nimages + 1)];
    UIImage *image = [UIImage imageNamed:imageName];
    if (tot==15) {
        break;
    }
    if (4==nimages) {
        nimages=0;
    }

    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];

    CGRect rect = imageView.frame;
    rect.size.height = 40;
    rect.size.width = 40;
    rect.origin.x = cx;
    rect.origin.y = 0;

    imageView.frame = rect;

    [scrollView addSubview:imageView];
    [imageView release];

    cx += imageView.frame.size.width+5;
    tot++;
}

self.pageControl.numberOfPages = nimages;
[scrollView setContentSize:CGSizeMake(cx, [scrollView bounds].size.height)];
}

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