ios - 使用 UIScrollView 的简单图片库

Question

我正在尝试创建一个非常基本的图片库，其中包含三张图片，用户可以滑过并查看图片。

我的解决方案是使用 UIColor

NSArray *colors = [NSArray arrayWithObjects:[UIColor blueColor], [UIColor redColor], [UIColor greenColor], nil];
for (int i = 0; i < colors.count; i++) {
    CGRect frame;
    frame.origin.x = 320 * i;
    frame.origin.y = 0;
    frame.size = CGSizeMake(320, 208);

    UIView *subview = [[UIView alloc] initWithFrame:frame];
    subview.backgroundColor = [colors objectAtIndex:i];
    [self.slideshow addSubview:subview];
}

self.slideshow.contentSize = CGSizeMake(320 * [colors count], 208);

但是类似的解决方案不显示图片

NSArray *images = [NSArray arrayWithObjects:[UIImage imageWithContentsOfFile:@"pic_1_3a.jpg"], [UIImage imageWithContentsOfFile:@"pic_1_3b.jpg"], [UIImage imageWithContentsOfFile:@"pic_1_3c.jpg"], nil];
for (int i = 0; i < images.count; i++) {
    CGRect frame;
    frame.origin.x = 320 * i;
    frame.origin.y = 0;
    frame.size = CGSizeMake(320, 208);

    UIImageView *subview = [[UIImageView alloc] initWithFrame:frame];
    subview.image = [images objectAtIndex:i];
    [self.slideshow addSubview:subview];
}

self.slideshow.contentSize = CGSizeMake(320 * [images count], 208);

有什么想法吗？ UIScrollView 存在于 UIView 中。

Answer 1

尝试改变

NSArray *images = [NSArray arrayWithObjects:[UIImage imageWithContentsOfFile:@"pic_1_3a.jpg"], [UIImage imageWithContentsOfFile:@"pic_1_3b.jpg"], [UIImage imageWithContentsOfFile:@"pic_1_3c.jpg"], nil];

到

NSArray *images = [NSArray arrayWithObjects:[UIImage imageNamed:@"pic_1_3a.jpg"], [UIImage imageNamed:@"pic_1_3b.jpg"], [UIImage imageNamed:@"pic_1_3c.jpg"], nil];