修改百度地图热力值色值颜色

Question

去掉外面那层蓝色的

var ThermodynamicDiagram = data.list;
        if (!isSupportCanvas()) {
            alert('热力图目前只支持有canvas支持的浏览器,您所使用的浏览器不能使用热力图功能~')
        }
        //详细的参数,可以查看heatmap.js的文档https://github.com/pa7/heatmap.js/blob/master/README.md
        //参数说明如下:
        /* visible 热力图是否显示,默认为true
             * opacity 热力的透明度,1-100
             * radius 势力图的每个点的半径大小   
             * gradient  {JSON} 热力图的渐变区间 . gradient如下所示
             *  {
                    .2:'rgb(0, 255, 255)',
                    .5:'rgb(0, 110, 255)',
                    .8:'rgb(100, 0, 255)'
                }
                其中 key 表示插值的位置, 0~1. 
                    value 为颜色值. 
             */
        heatmapOverlay = new BMapLib.HeatmapOverlay({
            "radius": 30
        });
        map.addOverlay(heatmapOverlay);
        heatmapOverlay.setDataSet({
            data: ThermodynamicDiagram,
            max: 10
        });
        //是否显示热力图
        function closeHeatmap() {
            heatmapOverlay.toggle();
        }
        closeHeatmap();

        function setGradient() {

            var gradient = {
                0.2:'rgb(255, 255, 255)',
                0.5:'rgb(255, 110, 0)',
                0.8:'rgb(255, 0, 0)',
            };
            var colors = document.querySelectorAll("input[type='color']");
            colors = [].slice.call(colors, 0);
            colors.forEach(function (ele) {
                gradient[ele.getAttribute("data-key")] = ele.value;
            });
            heatmapOverlay.setOptions({
                "gradient": gradient
            });
        }
        //判断浏览区是否支持canvas

        function isSupportCanvas() {
            var elem = document.createElement('canvas');
            return !!(elem.getContext && elem.getContext('2d'));
        }
        //热力图点击
        document.getElementById("Heatbutton").onclick = function () {
            closeHeatmap();
            ThermalButton = !ThermalButton;
            if (ThermalButton) {
                this.style.color = "#193ea7";
            } else {
                this.style.color = "#FFF";
            }
        }
```以上是代码

Answer 1

lors = [].slice.call(colors, 0);
colors.forEach(function (ele) {
gradient[ele.getAttribute("data-key")] = ele.value;
});
heatmapOverlay.setOptions({
"gradient": gradient
});
}
//判断浏览区是否支持canvas

    function isSupportCanvas() {
        var elem = document.createElement('canvas');
        return !!(elem.getContext && elem.getContext('2d'));
    }
    //热力图点击
    document.getElementById("Heatbutton").onclick = function () {
        closeHeatmap();
        ThermalButton = !ThermalButton;
        if (ThermalButton) {
            this.style.color = "#193ea7";
        } else {