使用 mousemove 移动 img

Question

我希望能够在图像放大后在其容器内四处移动 img，因为如您所见，一旦您单击该图像，它就会变得太大而您无法看到整个图像。另外，一旦图像没有被悬停，我怎样才能使图像恢复正常？提前致谢。

// Zoom in/out clothing img
  $('.image').click(function() {
    $(this).toggleClass('normal-zoom zoom-in');
  });

.container {
  width: 800px;
  margin: 0 auto;
  border: 2px solid black;
  display: flex;
}

.img-wrapper {
  margin: 10px;
  overflow: hidden;
}

.image {
  width: 100%;
  height: 100%;
}

.text {
  width: 40%;
  padding: 20px;
}

.normal-zoom {
  transform: scale(1);
  cursor: zoom-in;
  transition: all 250ms;
}

.zoom-in {
  transform: scale(1.6);
  cursor: zoom-out;
  transition: all 250ms;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
  <div class="img-wrapper">
    <img src="https://static1.squarespace.com/static/560c458be4b0af26f729d191/560c5de0e4b083d9c365515f/560d53d4e4b03b1013fd40de/1443714010032/lauren-winter-wide-pant-natural_0178.jpg?format=750w" class="image normal-zoom">
  </div>
  <p class="text">Kept in sent gave feel will oh it we. Has pleasure procured men laughing shutters nay. Old insipidity motionless continuing law shy partiality. Depending acuteness dependent eat use dejection. Unpleasing astonished discovered not nor shy. Morning hearted now met yet beloved evening. Has and upon his last here must. Cottage out enabled was entered greatly prevent message. No procured unlocked an likewise. Dear but what she been over gay felt body. Six principles advantages and use entreaties decisively. Eat met has dwelling unpacked see whatever followed. Court in of leave again as am. Greater sixteen to forming colonel no on be. So an advice hardly barton. He be turned sudden engage manner spirit.</p>
</div>

Answer 1

您可以使用带有 class .zoom-in 的图像上的 mousemove 事件侦听器来更改左侧和顶部 CSS 参数。确保在图像上设置 position:relative;。

示例：

$(document).on('mousemove', '.zoom-in', function( event ) {
  $(".text").text(event.pageX + ", " + event.pageY);
  var positionLeft = event.pageX - $(this).width()/2;
  var positionTop = event.pageY - $(this).height()/2;
        $(this).css({'left': positionLeft, 'top': positionTop});
});

这里是fiddle.

Answer 2

由于您使用 transform: scale() 作为缩放效果，因此修改 transform-origin 以更改鼠标移动缩放效果的中心点更快更正确：

// Zoom in/out clothing img
$('.image').click(function() {
  $(this).toggleClass('normal-zoom zoom-in');
});

$('.image').on('mousemove', function(event) {
  // This gives you the position of the image on the page
  var bbox = event.target.getBoundingClientRect();

  // Then we measure how far into the image the mouse is in both x and y directions
  var mouseX = event.clientX - bbox.left;
  var mouseY = event.clientY - bbox.top;

  // Then work out how far through the image as a percentage the mouse is
  var xPercent = (mouseX / bbox.width) * 100;
  var yPercent = (mouseY / bbox.height) * 100;

  // Then we change the `transform-origin` css property on the image to center the zoom effect on the mouse position
  //event.target.style.transformOrigin = xPercent + '% ' + yPercent + '%';
  // It's a bit clearer in jQuery:
  $(this).css('transform-origin', (xPercent+'% ' + yPercent+ '%') );
  // We add the '%' units to make sure the string looks exactly like the css declaration it becomes.

});

// If you want it to automatically trigger on hover
$('.image').on('mouseenter', function() {
  $(this).addClass('zoom-in');
  $(this).removeClass('normal-zoom');
});

// and stop when not hovering
$('.image').on('mouseleave', function() {
  $(this).addClass('normal-zoom');
  $(this).removeClass('zoom-in');
});

.container {
  width: 800px;
  margin: 0 auto;
  border: 2px solid black;
  display: flex;
}

.img-wrapper {
  margin: 10px;
  overflow: hidden;
}

.image {
  width: 100%;
  height: 100%;
}

.text {
  width: 40%;
  padding: 20px;
}

.normal-zoom {
  transform: scale(1);
  cursor: zoom-in;
  transition: transform 250ms;
}

.zoom-in {
  transform: scale(1.6);
  cursor: zoom-out;
  transition: transform 250ms;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
  <div class="img-wrapper">
    <img src="https://static1.squarespace.com/static/560c458be4b0af26f729d191/560c5de0e4b083d9c365515f/560d53d4e4b03b1013fd40de/1443714010032/lauren-winter-wide-pant-natural_0178.jpg?format=750w" class="image normal-zoom">
  </div>
  <p class="text">Kept in sent gave feel will oh it we. Has pleasure procured men laughing shutters nay. Old insipidity motionless continuing law shy partiality. Depending acuteness dependent eat use dejection. Unpleasing astonished discovered not nor shy. Morning hearted now met yet beloved evening. Has and upon his last here must. Cottage out enabled was entered greatly prevent message. No procured unlocked an likewise. Dear but what she been over gay felt body. Six principles advantages and use entreaties decisively. Eat met has dwelling unpacked see whatever followed. Court in of leave again as am. Greater sixteen to forming colonel no on be. So an advice hardly barton. He be turned sudden engage manner spirit.</p>
</div>

使用 mousemove 移动 img

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