iphone - 捏缩放在 ios7 中的多图像 UIScrollview 中不起作用

Question

我想在 uiscrollview 图像中捏缩放。我在 uiscrollview 中添加了多个图像但捏缩放不起作用我想捏缩放 UIImageview 图像。我已经引用了很多引用资料，但仍然不起作用

提前致谢

我的代码:-

for(int i = 0;i<aryImage.count;i++)
            {

                 //Create a uiimageview

                imageView =[[UIImageView alloc]init ];

                imageView.frame = CGRectMake((280 *i),0.0, 280, 475);
                imageView.image = [UIImage imageNamed:@"default.png"];
                imageView.tag = i;
                imageView.userInteractionEnabled = YES;
                [scrollGallery addSubview:imageView];

                scrollGallery.minimumZoomScale = 1.0;

                scrollGallery.maximumZoomScale = 2.0;

                scrollGallery.delegate = self;

               [scrollGallery addSubview:imageView];

            }
            scrollGallery.contentSize = CGSizeMake(280 * aryImage.count, scrollGallery.frame.size.height);
            pageControl.numberOfPages = aryImage.count;
            pageControlBeingUsed = NO;
            pageControl.currentPage = 0;




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

Answer 1

试试这个:

- (void)scrollViewDidZoom:(UIScrollView *)sv
{
    UIView* zoomView = [sv.delegate viewForZoomingInScrollView:sv];
    CGRect zvf = zoomView.frame;
    if(zvf.size.width < sv.bounds.size.width)
    {
        zvf.origin.x = (sv.bounds.size.width - zvf.size.width) / 2.0;
    }
    else
    {
        zvf.origin.x = 0.0;
    }
    if(zvf.size.height < sv.bounds.size.height)
    {
        zvf.origin.y = (sv.bounds.size.height - zvf.size.height) / 2.0;
    }
    else
    {
        zvf.origin.y = 0.0;
    }
    zoomView.frame = zvf;
}