jquery - CSS:显示裁剪图像的预览

Question

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Answer 1

这是按照他们的 thumbnail example 执行此操作的一种方法有一些偏差。

$(function () {
    var $target = $('#target'),
        $preview = $('#preview');
    // hold the coordinates of the cropped image
    var coords;
    // initialize the widget
    $target.Jcrop({
        // save the coordinates of the cropped image after selecting
        onSelect: function (c) {
           coords = c;
        }
    });
    // when a button is clicked, show preview of the cropped image using the saved coordinates 
    $('button').on('click', function () {
        // make a copy of the image with the original dimensions
        var $img = $('<img/>', {
            src: $target[0].src,
            css: {
              position: 'absolute',
              left: '-' + Math.round(coords.x) + 'px',
              top: '-' + Math.round(coords.y) + 'px',
              width: $target.css('width'),
              height: $target.css('height')
            }
        });
        // set the dimensions of the preview container
        $preview.css({
            position: 'relative',
            overflow: 'hidden',
            width: Math.round(coords.w) + 'px',
            height: Math.round(coords.h) + 'px'
        });
        // add+position image relative to its container 
        $preview.html($img);
    });
});

这是一个 demo .