在启用分页和多个图像的情况下缩放 UIScrollView

发布于 2024-10-12 07:57:29 字数 1253 浏览 6 评论 0原文

我有一个 UIScrollview ，其中有一个 UIImageView ，我可以在其中从一个图像滚动到另一个图像。

我使用了 TapToZoom Apple 示例代码来实现缩放，但每当我缩放时，滚动视图都会从头开始而不是活动图像。

这是我的一段代码：

初始化并填充图像视图：

table = [[NSMutableArray alloc] initWithCapacity:7];
for(int count = 1; count <= 7; count++)
{
    NSString *fileName = [NSString stringWithFormat:@"image%d.jpg", count];
    UIImage  *image    = [UIImage imageNamed:fileName];
    [table addObject:image];
    if (image == nil) {
        break;
    }
    imageView = [[UIImageView alloc] initWithImage:image];
    imageView.userInteractionEnabled = YES;
    imageView.multipleTouchEnabled = YES;

实现点击手势：

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];

handleDoubleTap方法缩放到imageView的中心并将滚动视图带到开始寻呼。

我对此进行了很多搜索，但无法找到放大实际显示图像的方法。

提前致谢：）

原文

I Have a UIScrollview with a UIImageView inside where I scroll from an image to another.

I used the TapToZoom Apple sample code to implement the zoom but whenever I zoom the scrollview starts from the begining rather than the active image.

Here's a piece of my code :

Init and populate the imageview :

table = [[NSMutableArray alloc] initWithCapacity:7];
for(int count = 1; count <= 7; count++)
{
    NSString *fileName = [NSString stringWithFormat:@"image%d.jpg", count];
    UIImage  *image    = [UIImage imageNamed:fileName];
    [table addObject:image];
    if (image == nil) {
        break;
    }
    imageView = [[UIImageView alloc] initWithImage:image];
    imageView.userInteractionEnabled = YES;
    imageView.multipleTouchEnabled = YES;

Implement Tap Gesture :

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];

The handleDoubleTap method zooms to the center of the the imageView and brings the scrollview to the begigining of the paging.

I searched a lot about this, but was unable to find a way to zoom on the actual displayed image.

Thanks in advance :)

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