Question

我有主UIScrollView

mainScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 440)];
mainScrollView.pagingEnabled = YES;
imageScrollView.contentSize = CGSizeMake(320 * [myImage count], 440);

，其中包含多个子UIScrollView，每个子UIScrollView包含UIImageView

for (int i = 0; i < [myImage count]; i++)
{
    imageView = [[UIImageView alloc] init];
    [imageView setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];

    NSString *strimage = [myImage objectAtIndex:i];
    NSURL *imageUrl = [NSURL URLWithString:strimage];

    [imageView setImageWithURL:imageUrl placeholderImage:[UIImage imageNamed:@"Placeholder"]];

    imageView.frame = CGRectMake(0, 0, 320, 440);

    subScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(320 * i, 0, 320, 440)];
    subScrollView.contentSize =
    CGSizeMake(imageView.frame.size.width, imageView.frame.size.height);
    subScrollView.pagingEnabled = YES;
    subScrollView.showsHorizontalScrollIndicator = NO;
    subScrollView.showsVerticalScrollIndicator = NO;
    subScrollView.delegate = self;
    subScrollView.bouncesZoom = YES;
    subScrollView.clipsToBounds = YES;

    subScrollView.maximumZoomScale = 3.0;
    subScrollView.minimumZoomScale = 1.0;
    subScrollView.zoomScale = 1.0;

    [mainScrollView addSubview:subScrollView];
    [subScrollView addSubview:imageView];
}

，我实施

#pragma mark UIScrollViewDelegate methods

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return imageView;
}

问题是，当我放大UIImageView时，假设有3个子UIScrollView，最后一个子UIScrollView可以正常缩放UIImageView，但是当我放大UIScrollView时放大它，它缩放子UIImageView而不是UIScrollView，它会影响最后一个子UIImageView也可以缩放，我做错了吗？

我怀疑在viewForZoomingInScrollView中，它只能缩放UIScrollView（最后一个{{1}}}。

提前谢谢你：）

Answer 1

最后我弄明白了，当我放大特定UIImageView时，我只需要更新我的UIImageView 在 - （UIView *）viewForZoomingInScrollView :( UIScrollView *）scrollView如下：

#pragma mark -
#pragma mark UIScrollViewDelegate methods

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    for (UIImageView *iv in [scrollView subviews]) {
        imageView = iv;
        break;
    }

    return imageView;
}

希望它可以帮助那些在这一点上与我斗争的人，所以你不必浪费时间:)。

scrollview sub uiscrollviews uiimageview viewForZoomingInScrollView

1 个答案: