我有以下用于图像放大/缩小的代码。问题是当我尝试根据需要定位图像时，即我向图像或图像容器应用左侧边距，即 #view 它会影响图像缩放（进/出） - 在图像缩放时图像开始向左移动（因为边缘）正如您在下面的小提琴链接中看到的那样。删除剩余边距使其再次运行良好。我想把它放在我希望的地方而不影响缩放。如果我不清楚，请告诉我。
/*style.css*/
#view {
border: 1px solid #333333 ;
overflow: hidden ;
position: relative ;
width: 400px ;
/*giving margin left to move image to the center*/
margin-left: 400px;
}
.imageZoomInOut {
display: block ;
left: 0px ;
top: 0px ;
}
#zoom {
background-imageZoomInOut: url( "./white_fade.png" ) ;
border: 1px solid #000000 ;
cursor: pointer ;
display: none ;
height: 200px ;
position: absolute ;
width: 200px ;
z-index: 100 ;
}
//******************** js *******************
// When the WINDOW is ready, initialize. We are going with
// the window load rather than the document so that we
// know our imageZoomInOut will be ready as well (complete with
// gettable dimentions).
$(document).ready(function(){
// First, let's get refernces to the elements we will
// be using.
var view = $( "#view" );
var imageZoomInOut = $( ".imageZoomInOut" );
// Create the ZOOM element - this will be added with
// Javascript since it's more of an "effect".
var zoom = $( "<a id='zoom'><span><br /></span></a>" );
// Before we start messing with the scripts, let's
// update the display to allow for the absolute
// positioning of the imageZoomInOut and zoomer.
// Set an explicit height / width on the view based
// on the initial size of the imageZoomInOut.
view.width( imageZoomInOut.width() );
view.height( imageZoomInOut.height() );
// Now that the view has an explicit width and height,
// we can change the displays for positioning.
imageZoomInOut.css( "position", "absolute" );
// Set an exlicit height on the imageZoomInOut (to make sure
// that some of the later calcualtions don't get
// messed up - I saw some irradic caculated-height
// behavior).
imageZoomInOut.height( imageZoomInOut.height() );
// Before we add the zoom square, we need it to match
// the aspect ratio of the imageZoomInOut.
zoom.width( Math.floor( imageZoomInOut.width() / 2 ) );
zoom.height( Math.floor( imageZoomInOut.height() / 2 ) );
// Now, add the zoom square to the view.
view.append( zoom );
// ---------------------------------------------- //
// ---------------------------------------------- //
// Now that we have our UI set up physically, we need
// to bind the event handlers.
// We want to show and hide the zoom only when the
// user hovers over the view.
view.hover(
function( event ){
// Show the soom.
zoom.show();
},
function( event ){
// Hide the zoom.
zoom.hide();
}
);
// As the user mouses over the view, we can get the
// mouse coordinates in terms of the page; we need
// to be able to translate those into VIEW-based
// X and Y cooridates. As such, let's get the offset
// of the view as our base 0x0 coordinate.
//
// NOTE: We are doing this here so that we do it once,
// rather than every time the mouse moves.
viewOffset = view.offset();
// Get the jQuery-ed version of the window as we will
// need to access it's scroll offsets every time the
// mouse moves over the div.
//
// NOTE: This will change the change the refernce to
// "window" for all of the code in this closure.
var window = $( window );
// As the user moves across the view, we want to move
// the zoom square with them.
view.mousemove(
function( event ){
// Get the window scroll top; the mouse
// position is relative to the window, NOT
// the document.
var windowScrollTop = window.scrollTop();
var windowScrollLeft = window.scrollLeft();
// Translate the mouse X / Y into view-local
// coordinates that can be used to position
// the zoom box.
setZoomPosition(
Math.floor(
event.clientX - viewOffset.left + windowScrollLeft
),
Math.floor(
event.clientY - viewOffset.top + windowScrollTop
)
);
}
);
// I position the zoom box within the view based on
// the given view-local mouse coordinates.
var setZoomPosition = function( mouseLeft, mouseTop ){
// Ideally, we want to keep the zoom box centered
// on the mouse. As such, we want the given mouse
// left and mouse top coordiantes to be in the
// middle of the zoom box.
var zoomLeft = (mouseLeft - (zoom.width() / 2));
var zoomTop = (mouseTop - (zoom.height() / 2))
// As we move the zoom box around, however, we
// never want it to go out of bounds of the view.
// Protect the top-left bounds.
zoomLeft = Math.max( zoomLeft, 0 );
zoomTop = Math.max( zoomTop, 0 );
// Protect the bottom-right bounds. Because the
// bottom and right need to take the dimensions
// of the zoom box into account, be sure to use
// the outer width to include the border.
zoomLeft = Math.min(
zoomLeft,
(view.width() - zoom.outerWidth())
);
zoomTop = Math.min(
zoomTop,
(view.height() - zoom.outerHeight())
);
// Position the zoom box in the bounds of the
// imageZoomInOut view box.
zoom.css({
left: (zoomLeft + "px"),
top: (zoomTop + "px")
});
};
// Now that we have the mouse movements being tracked
// properly, we need to track the click on the zoom to
// zoom in the imageZoomInOut on demand. To do that, however,
// we need to start storing some information with the
// imageZoomInOut so we can manipulate it as needed.
imageZoomInOut.data({
zoomFactor: (view.width() / zoom.width()),
zoom: 1,
top: 0,
left: 0,
width: imageZoomInOut.width(),
height: imageZoomInOut.height(),
originalWidth: imageZoomInOut.width(),
originalHeight: imageZoomInOut.height()
});
// Now, let's attach the click event handler to the
// zoom box.
zoom.click(
function( event ){
// First, prevent the default since this is
// not a navigational link.
event.preventDefault();
// Let's pass the position of the zoom box
// off to the function that is responsible
// for zooming the imageZoomInOut.
zoomImage(
zoom.position().left,
zoom.position().top
);
}
);
// I take the zoom box coordinates and translate them
// into an actual imageZoomInOut zoom based on the existing
// zoom and offset of the imageZoomInOut.
//
// NOTE: We don't care about the dimensions of the
// zoom box itself as those should have already been
// properly translated into the zoom *factor*.
var zoomImage = function( zoomLeft, zoomTop ){
// Get a reference to the imageZoomInOut data object so we
// don't need to keep retreiving it.
var imageZoomInOutData = imageZoomInOut.data();
// Check to see if we have reached the max zoom
// or if the imageZoomInOut is currently animating.
// If so, just return out.
if (
(imageZoomInOutData.zoom == 5) ||
(imageZoomInOut.is( ":animated" ))
){
// Zooming in beyond this is pointless (and
// can cause the browser to mis-render the
// imageZoomInOut).
return;
}
// Scale the imageZoomInOut up based on the zoom factor.
imageZoomInOutData.width =
(imageZoomInOut.width() * imageZoomInOutData.zoomFactor);
imageZoomInOutData.height =
(imageZoomInOut.height() * imageZoomInOutData.zoomFactor);
// Change the offset set data to re-position the
// 0,0 coordinate back up in the top left.
imageZoomInOutData.left =
((imageZoomInOutData.left - zoomLeft) * imageZoomInOutData.zoomFactor);
imageZoomInOutData.top =
((imageZoomInOutData.top - zoomTop) * imageZoomInOutData.zoomFactor);
// Increase the zoom.
imageZoomInOutData.zoom++;
// Animate the zoom.
imageZoomInOut.animate(
{
width: imageZoomInOutData.width,
height: imageZoomInOutData.height,
left: imageZoomInOutData.left,
top: imageZoomInOutData.top
},
500
);
};
// I reset the imageZoomInOut zoom.
var resetZoom = function(){
// Get a reference to the imageZoomInOut data object so we
// don't need to keep retreiving it.
var imageZoomInOutData = imageZoomInOut.data();
// Reset the imageZoomInOut data.
imageZoomInOutData.zoom = 1;
imageZoomInOutData.top = 0;
imageZoomInOutData.left = 0;
imageZoomInOutData.width = imageZoomInOutData.originalWidth;
imageZoomInOutData.height = imageZoomInOutData.originalHeight;
// Animate the zoom.
imageZoomInOut.animate(
{
width: imageZoomInOutData.width,
height: imageZoomInOutData.height,
left: imageZoomInOutData.left,
top: imageZoomInOutData.top
},
300
);
};
$("button").click(function(){
resetZoom();
});
// As a final step, to make sure that the imageZoomInOut can
// be zoomed out, bind the mousedown to the document.
$( document ).mousedown(
function( event ){
// Check to see if the view is in the event
// bubble chain for the mouse down. If it is,
// then this click was in the view or its
// child elements.
var closestView = $( event.target ).closest( "#view" );
// Check to see if this mouse down was in the
// imageZoomInOut view.
if (!closestView.size()){
// The view was not found in the chain.
// This was clicked outside of the view.
// Reset the imageZoomInOut zoom.
resetZoom();
}
}
);
});
<!--- html --->
<div id="view">
<img class="imageZoomInOut" height="600" width="400" src="http://imedia.tv.com.pk/tvb/galery_celebrities/medium/Fawad_afzal_khan_image_90.jpg">
</div>