缩放图像的特定部分

Question

悬停图像时如何制作像这样的缩放效果 Sample Image

Answer 1

试试这个

(function ($) {
    $(document).ready(function() {
        $('.xzoom, .xzoom-gallery').xzoom({zoomWidth: 400, title: true, tint: '#333', Xoffset: 15});
        $('.xzoom2, .xzoom-gallery2').xzoom({position: '#xzoom2-id', tint: '#ffa200'});
        $('.xzoom3, .xzoom-gallery3').xzoom({position: 'lens', lensShape: 'circle', sourceClass: 'xzoom-hidden'});
        $('.xzoom4, .xzoom-gallery4').xzoom({tint: '#006699', Xoffset: 15});
        $('.xzoom5, .xzoom-gallery5').xzoom({tint: '#006699', Xoffset: 15});

        //Integration with hammer.js
        var isTouchSupported = 'ontouchstart' in window;

        if (isTouchSupported) {
            //If touch device
            $('.xzoom, .xzoom2, .xzoom3, .xzoom4, .xzoom5').each(function(){
                var xzoom = $(this).data('xzoom');
                xzoom.eventunbind();
            });
            
            $('.xzoom, .xzoom2, .xzoom3').each(function() {
                var xzoom = $(this).data('xzoom');
                $(this).hammer().on("tap", function(event) {
                    event.pageX = event.gesture.center.pageX;
                    event.pageY = event.gesture.center.pageY;
                    var s = 1, ls;
    
                    xzoom.eventmove = function(element) {
                        element.hammer().on('drag', function(event) {
                            event.pageX = event.gesture.center.pageX;
                            event.pageY = event.gesture.center.pageY;
                            xzoom.movezoom(event);
                            event.gesture.preventDefault();
                        });
                    }
    
                    xzoom.eventleave = function(element) {
                        element.hammer().on('tap', function(event) {
                            xzoom.closezoom();
                        });
                    }
                    xzoom.openzoom(event);
                });
            });

        $('.xzoom4').each(function() {
            var xzoom = $(this).data('xzoom');
            $(this).hammer().on("tap", function(event) {
                event.pageX = event.gesture.center.pageX;
                event.pageY = event.gesture.center.pageY;
                var s = 1, ls;

                xzoom.eventmove = function(element) {
                    element.hammer().on('drag', function(event) {
                        event.pageX = event.gesture.center.pageX;
                        event.pageY = event.gesture.center.pageY;
                        xzoom.movezoom(event);
                        event.gesture.preventDefault();
                    });
                }

                var counter = 0;
                xzoom.eventclick = function(element) {
                    element.hammer().on('tap', function() {
                        counter++;
                        if (counter == 1) setTimeout(openfancy,300);
                        event.gesture.preventDefault();
                    });
                }

                function openfancy() {
                    if (counter == 2) {
                        xzoom.closezoom();
                        $.fancybox.open(xzoom.gallery().cgallery);
                    } else {
                        xzoom.closezoom();
                    }
                    counter = 0;
                }
            xzoom.openzoom(event);
            });
        });
        
        $('.xzoom5').each(function() {
            var xzoom = $(this).data('xzoom');
            $(this).hammer().on("tap", function(event) {
                event.pageX = event.gesture.center.pageX;
                event.pageY = event.gesture.center.pageY;
                var s = 1, ls;

                xzoom.eventmove = function(element) {
                    element.hammer().on('drag', function(event) {
                        event.pageX = event.gesture.center.pageX;
                        event.pageY = event.gesture.center.pageY;
                        xzoom.movezoom(event);
                        event.gesture.preventDefault();
                    });
                }

                var counter = 0;
                xzoom.eventclick = function(element) {
                    element.hammer().on('tap', function() {
                        counter++;
                        if (counter == 1) setTimeout(openmagnific,300);
                        event.gesture.preventDefault();
                    });
                }

                function openmagnific() {
                    if (counter == 2) {
                        xzoom.closezoom();
                        var gallery = xzoom.gallery().cgallery;
                        var i, images = new Array();
                        for (i in gallery) {
                            images[i] = {src: gallery[i]};
                        }
                        $.magnificPopup.open({items: images, type:'image', gallery: {enabled: true}});
                    } else {
                        xzoom.closezoom();
                    }
                    counter = 0;
                }
                xzoom.openzoom(event);
            });
        });

        } else {
            //If not touch device

            //Integration with fancybox plugin
            $('#xzoom-fancy').bind('click', function(event) {
                var xzoom = $(this).data('xzoom');
                xzoom.closezoom();
                $.fancybox.open(xzoom.gallery().cgallery, {padding: 0, helpers: {overlay: {locked: false}}});
                event.preventDefault();
            });
           
            //Integration with magnific popup plugin
            $('#xzoom-magnific').bind('click', function(event) {
                var xzoom = $(this).data('xzoom');
                xzoom.closezoom();
                var gallery = xzoom.gallery().cgallery;
                var i, images = new Array();
                for (i in gallery) {
                    images[i] = {src: gallery[i]};
                }
                $.magnificPopup.open({items: images, type:'image', gallery: {enabled: true}});
                event.preventDefault();
            });
        }
    });
})(jQuery);

<link href="https://unpkg.com/xzoom@1.0.7/dist/xzoom.css" rel="stylesheet"/>
<script src="https://code.jquery.com/jquery-2.1.1.js"></script>
<script src="https://unpkg.com/xzoom@1.0.7/dist/xzoom.min.js"></script>
<script src="https://hammerjs.github.io/dist/hammer.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.3.1/js/foundation.min.js"></script>
<body>
  
  <div class="container">
    
    <!-- default start -->
    <section id="default" class="padding-top0">
    <div class="row">
      <div class="large-12 column"><h3>Product Zooming</h3></div>
        <hr>
      <div class="large-5 column">
        <div class="xzoom-container">
          <img class="xzoom" id="xzoom-default" src="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/preview/01_b_car.jpg" xoriginal="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/original/01_b_car.jpg" />
          <div class="xzoom-thumbs">
            <a href="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/original/01_b_car.jpg"><img class="xzoom-gallery" width="80" src="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/thumbs/01_b_car.jpg"  xpreview="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/preview/01_b_car.jpg" title="The description goes here"></a>
              
            <a href="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/original/02_o_car.jpg"><img class="xzoom-gallery" width="80" src="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/preview/02_o_car.jpg" title="The description goes here"></a>
              
            <a href="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/original/03_r_car.jpg"><img class="xzoom-gallery" width="80" src="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/preview/03_r_car.jpg" title="The description goes here"></a>
              
            <a href="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/original/04_g_car.jpg"><img class="xzoom-gallery" width="80" src="http://www.jqueryscript.net/demo/Feature-rich-Product-Gallery-With-Image-Zoom-xZoom/images/gallery/preview/04_g_car.jpg" title="The description goes here"></a>
          </div>
        </div>        
      </div>
      <div class="large-7 column"></div>
    </div>
    </section>
    <!-- default end -->
  </div>
  </body>

Answer 2

$(document).ready(function(){

	var native_width = 0;
	var native_height = 0;

	//Now the mousemove function
	$(".magnify").mousemove(function(e){
		//When the user hovers on the image, the script will first calculate
		//the native dimensions if they don't exist. Only after the native dimensions
		//are available, the script will show the zoomed version.
		if(!native_width && !native_height)
		{
			//This will create a new image object with the same image as that in .small
			//We cannot directly get the dimensions from .small because of the 
			//width specified to 200px in the html. To get the actual dimensions we have
			//created this image object.
			var image_object = new Image();
			image_object.src = $(".small").attr("src");
			
			//This code is wrapped in the .load function which is important.
			//width and height of the object would return 0 if accessed before 
			//the image gets loaded.
			native_width = image_object.width;
			native_height = image_object.height;
		}
		else
		{
			//x/y coordinates of the mouse
			//This is the position of .magnify with respect to the document.
			var magnify_offset = $(this).offset();
			//We will deduct the positions of .magnify from the mouse positions with
			//respect to the document to get the mouse positions with respect to the 
			//container(.magnify)
			var mx = e.pageX - magnify_offset.left;
			var my = e.pageY - magnify_offset.top;
			
			//Finally the code to fade out the glass if the mouse is outside the container
			if(mx < $(this).width() && my < $(this).height() && mx > 0 && my > 0)
			{
				$(".large").fadeIn(100);
			}
			else
			{
				$(".large").fadeOut(100);
			}
			if($(".large").is(":visible"))
			{
				//The background position of .large will be changed according to the position
				//of the mouse over the .small image. So we will get the ratio of the pixel
				//under the mouse pointer with respect to the image and use that to position the 
				//large image inside the magnifying glass
				var rx = Math.round(mx/$(".small").width()*native_width - $(".large").width()/2)*-1;
				var ry = Math.round(my/$(".small").height()*native_height - $(".large").height()/2)*-1;
				var bgp = rx + "px " + ry + "px";
				
				//Time to move the magnifying glass with the mouse
				var px = mx - $(".large").width()/2;
				var py = my - $(".large").height()/2;
				//Now the glass moves with the mouse
				//The logic is to deduct half of the glass's width and height from the 
				//mouse coordinates to place it with its center at the mouse coordinates
				
				//If you hover on the image now, you should see the magnifying glass in action
				$(".large").css({left: px, top: py, backgroundPosition: bgp});
			}
		}
	})
})

/*Some CSS*/
* {margin: 0; padding: 0;}
.magnify {width: 200px; margin: 50px auto; position: relative;}

/*Lets create the magnifying glass*/
.large {
	width: 175px; height: 175px;
	position: absolute;
	border-radius: 100%;
	
	/*Multiple box shadows to achieve the glass effect*/
	box-shadow: 0 0 0 7px rgba(255, 255, 255, 0.85), 
	0 0 7px 7px rgba(0, 0, 0, 0.25), 
	inset 0 0 40px 2px rgba(0, 0, 0, 0.25);
	
	/*Lets load up the large image first*/
	background: url('http://thecodeplayer.com/uploads/media/iphone.jpg') no-repeat;
	
	/*hide the glass by default*/
	display: none;
}

/*To solve overlap bug at the edges during magnification*/
.small { display: block; }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- Lets make a simple image magnifier -->
<div class="magnify">
	
	<!-- This is the magnifying glass which will contain the original/large version -->
	<div class="large"></div>
	
	<!-- This is the small image -->
	<img class="small" src="http://thecodeplayer.com/uploads/media/iphone.jpg" width="200"/>
	
</div>

<!-- Lets load up prefixfree to handle CSS3 vendor prefixes -->
<script src="http://thecodeplayer.com/uploads/js/prefixfree.js" type="text/javascript"></script>
<!-- You can download it from http://leaverou.github.com/prefixfree/ -->

<!-- Time for jquery action -->
<script src="http://thecodeplayer.com/uploads/js/jquery-1.7.1.min.js" type="text/javascript"></script>