Iphone 如何使图像在我双击的地方缩放？

我设法让我的应用程序放大我的图像，如果我双击它，但它没有放大我双击的地方！我希望图像以我双击的坐标为中心

我的代码：

在.h文件中：

 - (void)handleDoubleTap:(UIGestureRecognizer *)gestureRecognizer;

在.m文件中：

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

[doubleTap setNumberOfTapsRequired:2];

[self.scroll addGestureRecognizer:doubleTap];

- (void)handleDoubleTap:(UIGestureRecognizer *)gestureRecognizer {  

    if(self.scroll.zoomScale > scroll.minimumZoomScale)
        [self.scroll setZoomScale:scroll.minimumZoomScale animated:YES]; 
    else 
        [self.scroll setZoomScale:1.6 animated:YES]; 
 }

接下来我该怎么办

提前谢谢

---

/您正在查找的noob

位置查看：。它将在指定的视图中为您提供触摸发生的位置。此时，您可以调整视图以使该点成为中心。

这里是我以前项目的一个片段。
在

init

-方法中的某个位置添加

UITapGestureRecognitizer

：

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(doubleTapRecognized:)];
doubleTap.numberOfTapsRequired = 2;
[self addGestureRecognizer:doubleTap];
[doubleTap release];

双击你视野中的某个地方就会触发此get

- (void)doubleTapRecognized:(UITapGestureRecognizer*)recognizer {
    [self zoomToPoint:[recognizer locationInView:content]];
}

- (void)zoomToPoint:(CGPoint)location {
    float zoomScaleBefore = self.zoomScale;

    if (location.x<=0) location.x = 1;
    if (location.y<=0) location.y = 1;
    if (location.x>=content.bounds.size.width) location.x = content.bounds.size.width-1;
    if (location.y>=content.bounds.size.height) location.y = content.bounds.size.height-1;

    float percentX = location.x/content.bounds.size.width;
    float percentY = location.y/content.bounds.size.height;


    [self setZoomScale:10.0 animated:YES];

    float pox = (percentX*self.contentSize.width)-(self.frame.size.width/2);
    float poy = (percentY*self.contentSize.height)-(self.frame.size.height/2);

    if (pox<=0) pox = 1;
    if (poy<=0) poy = 1;

    [self scrollRectToVisible:
     CGRectMake(pox, poy, self.frame.size.width, self.frame.size.height)
                     animated:(self.zoomScale == zoomScaleBefore)];
}

-（void）DoubleTapRecognited:（UITapGestureRecognitizer*）识别器{
[自zoomToPoint:[识别器位置查看：内容]]；
}
-（void）zoomToPoint:（CGPoint）位置{
float zoomScaleBefore=self.zoomScale；
如果（location.x=content.bounds.size.height）location.y=content.bounds.size.height-1；
浮动百分比x=location.x/content.bounds.size.width；
浮动百分比=location.y/content.bounds.size.height；
[自设置ZoomScale:10.0动画：是]；
float pox=（percentX*self.contentSize.width）-（self.frame.size.width/2）；
浮点poy=（百分比*self.contentSize.height）-（self.frame.size.height/2）；
如果（pox）Swift 3.0版本在双击时缩放：

let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(onDoubleTap(gestureRecognizer:)))
tapRecognizer.numberOfTapsRequired = 2
view.addGestureRecognizer(tapRecognizer)


谢谢！如果你能写一个我应该使用的代码，我会非常喜欢的！如果不是太多的工作的话！：）这很复杂。你将在指定的视图中获得坐标。如果你指定图像视图，你需要知道图像视图和控制器视图之间的关系。如果你指定控制器视图，你需要知道图像视图在控制器视图中的位置。我不明白该怎么办，所以rry：（非常好用。在这一点上，我觉得重要的是：这段代码来自UIScrollView类。如果有人想使用ScrollView作为出口：“self”。参数需要用ScrollView名称以及“content”（表示UIImageView）扩展。
func onDoubleTap(gestureRecognizer: UITapGestureRecognizer) {
    let scale = min(scrollView.zoomScale * 2, scrollView.maximumZoomScale)

    if scale != scrollView.zoomScale {
        let point = gestureRecognizer.location(in: imageView)

        let scrollSize = scrollView.frame.size
        let size = CGSize(width: scrollSize.width / scale,
                          height: scrollSize.height / scale)
        let origin = CGPoint(x: point.x - size.width / 2,
                             y: point.y - size.height / 2)
        scrollView.zoom(to:CGRect(origin: origin, size: size), animated: true)
        print(CGRect(origin: origin, size: size))
    }
}