layer.photos 放大缩小，旋转

最新推荐文章于 2025-06-01 09:01:01 发布

原创最新推荐文章于 2025-06-01 09:01:01 发布 · 9.2k 阅读

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本文介绍如何在layui框架中实现图片层的旋转和缩放功能，通过自定义JavaScript代码，解决了layer.photos组件不支持旋转的问题，并优化了图片缩放效果。

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1.旋转
最后做图片旋转，因为 layer.photos目前不支持旋转，缩放，所以自己研究了一下。直接上代码

$(document).on("click", ".layui-layer-phimg", function (e) {
    /*var current = $("#current").val();
    current = (current+90)%360;
    $("#current").val(current);
    document.getElementById('imglayer').style.transform = 'rotate('+current+'deg)';*/
    var current = $("#current").val();
    if (current == 0) {
        current = 90;
    }else if (current == 90) {
        current = 180;
    }else if(current == 180) {
        current = 270;
    }else if (current == 270) {
        current = 0;
    }
    document.getElementById('imglayer').style.transform = 'rotate(' + current + 'deg)';
    $("#current").val(current);
});

layer.js 修改

content: '<input type="hidden" id="current"><div class="layui-layer-phimg"><img id="imglayer" src="' + u[d].src + '" alt="' + (u[d].alt || "") + '" layer-pid="' + u[d].pid + '"><div class="layui-layer-imgbar" style="width:100%;height: 100%; background-color:rgba(0, 0, 0, 0)"></div><div class="layui-layer-imgsee">' + (u.length > 1 ? '<span class="layui-layer-imguide"><a href="javascript:;" class="layui-layer-iconext layui-layer-imgprev"></a><a href="javascript:;" class="layui-layer-iconext layui-layer-imgnext"></a></span>' : "") + '<div class="layui-layer-imgbar" style="display:' + (a ? "block" : "") + '"><span class="layui-layer-imgtit"><a href="javascript:;">' + (u[d].alt || "") + "</a><em>" + s.imgIndex + "/" + u.length + "</em></span></div></div></div>",

2.缩放

layer.photos本省可以缩放，但是效果不太理想

$(document).on("mousewheel DOMMouseScroll", ".layui-layer-phimg", function (e) {
    var delta = (e.originalEvent.wheelDelta && (e.originalEvent.wheelDelta > 0 ? 1 : -1)) || // chrome & ie
        (e.originalEvent.detail && (e.originalEvent.detail > 0 ? -1 : 1)); // firefox
    var imagep = $(".layui-layer-phimg").parent().parent();
    var image = $(".layui-layer-phimg").parent();
    var h = image.height();
    var w = image.width();
    if (delta > 0) {
        if (h < (window.innerHeight)) {
            h = h * 1.05;
            w = w * 1.05;
        }
    } else if (delta < 0) {
        if (h > 100) {
            h = h * 0.95;
            w = w * 0.95;
        }
    }
    imagep.css("top", (window.innerHeight - h) / 2);
    imagep.css("left", (window.innerWidth - w) / 2);
    image.height(h);
    image.width(w);
    imagep.height(h);
    imagep.width(w);
});