Question

我目前正在尝试d-i-y拼贴游戏，用户可以单击图像并将其拖动到所需位置。该代码可以正常工作，除了在加载时，所有图像都在左上角缩小。它们彼此重叠，并将它们隐藏在它们下面。

我不知道为什么随机位置生成无法正常工作。图像在div中，作为一个初学者，我不知道当前是否还有另一种方法。 Math.random（）是否可能？

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

<script>
    let currentlyDragging;
    let drawing = false;;
    let offset_x;
    let offset_y;
    let puzzle;


    $(window).load(function () {
        $(".draggable").click(startDragging);
        $(".draggable").mousemove(whileDragging);
        $("#puzzle").mousemove(whileDragging);

        puzzle = document.getElementById("puzzle");
    });

    function startDragging(e) {
        if (!drawing) {
            drawing = true;
            currentlyDragging = $(this);
            if (offset_x == null && offset_y == null) {
                var current_origin_y;
                var current_origin_x;
                var current_origin_y_string = currentlyDragging.context.style['margin-top'];
                if (current_origin_y_string === "") {
                    current_origin_y = 0;
                } else {
                    current_origin_y = parseInt(current_origin_y_string.split("px")[0]);
                }
                var current_origin_x_string = currentlyDragging.context.style['margin-left'];

                if (current_origin_x_string === "") {
                    current_origin_x = 0;
                } else {
                    current_origin_x = parseInt(current_origin_x_string.split("px")[0]);
                }
                offset_x = current_origin_x - e.pageX;
                offset_y = current_origin_y - e.pageY;
            }
        } else {
            drawing = false;
            currentlyDragging = null;
            offset_x = null;
            offset_y = null;
        }
    }

    function whileDragging(e) {
        if (currentlyDragging == null) {
            return false;
        }

        currentlyDragging.css({
            "margin-top": Math.min(Math.max(e.pageY + offset_y, 0), puzzle.clientHeight - currentlyDragging.context.height) + "px",
            "margin-left": Math.min(Math.max(e.pageX + offset_x, 0), puzzle.clientWidth - currentlyDragging.context.width) + "px"
        });
    }
</script>


<style>
    .draggable {
        position: absolute;
        cursor: pointer;
        user-select: none;
    }
</style>

<div id="puzzle" scroll="no" style="height: 100%; overflow: hidden; border: 5px solid yellow;">
    <img class=draggable src="https://avatars3.githubusercontent.com/u/9167554?s=460&v=4" width=50 height=50 />
    <img class=draggable src="https://avatars3.githubusercontent.com/u/9167554?s=460&v=4" width=50 height=50 />
    <img class=draggable src="https://avatars3.githubusercontent.com/u/9167554?s=460&v=4" width=50 height=50 />
    <img class=draggable src="https://avatars3.githubusercontent.com/u/9167554?s=460&v=4" width=50 height=50 />
    <img class=draggable src="https://avatars3.githubusercontent.com/u/9167554?s=460&v=4" width=50 height=50 />
</div>
</body>

有没有一种方法可以在随机位置生成图像（javascript）？

0 个答案: