高德地图渲染路线

在项目中，使用百度地图时，发现通过城市名获取经纬度不准确，故替换为高德地图。

代码如下：

var points = []
var adds = ['江苏省无锡市惠山区','江苏省常州市金坛市','江苏省泰州市姜堰县']

var startIcon = new AMap.Icon({
    // 图标尺寸
    size: new AMap.Size(22, 28),
    image:'http://new.tzwlpzw.com/homeStatic/images/dt_start.png',
    // 图标所用图片大小
    imageSize: new AMap.Size(22, 28),
})
var throughIcon = new AMap.Icon({
    // 图标尺寸
    size: new AMap.Size(22, 28),
    image:'http://new.tzwlpzw.com/homeStatic/images/dt_through.png',
    // 图标所用图片大小
    imageSize: new AMap.Size(22, 28),
})
var endIcon = new AMap.Icon({
    // 图标尺寸
    size: new AMap.Size(22, 28),
    image:'http://new.tzwlpzw.com/homeStatic/images/dt_end.png',
    // 图标所用图片大小
    imageSize: new AMap.Size(22, 28),
})

//在轨迹点上创建图标
function addMarker(points){  // 创建图标对象     
    for(var i = 0,pointsLen = points.length;i <pointsLen;i++){  
        if ( i < 1 ) {
            var marker = new AMap.Marker({
                position: new AMap.LngLat(points[i].location.lng,points[i].location.lat),
                icon: startIcon,
                offset: new AMap.Pixel(-11, -28)
            });
            marker.setMap(map);
            marker.setLabel({
                offset: new AMap.Pixel(-10, -5),  //设置文本标注偏移量
                content: "<div class='info'>"+points[i].formattedAddress+"</div>", //设置文本标注内容
                direction: 'right' //设置文本标注方位
            });
        } else if ( i === points.length - 1 ) {
            var marker = new AMap.Marker({
                position: new AMap.LngLat(points[i].location.lng,points[i].location.lat),
                icon: endIcon,
                offset: new AMap.Pixel(-11, -28)
            });
            marker.setMap(map);
            marker.setLabel({
                offset: new AMap.Pixel(-10, -5),  //设置文本标注偏移量
                content: "<div class='info'>"+points[i].formattedAddress+"</div>", //设置文本标注内容
                direction: 'right' //设置文本标注方位
            });
        } else {
            var marker = new AMap.Marker({
                position: new AMap.LngLat(points[i].location.lng,points[i].location.lat),
                icon: throughIcon,
                offset: new AMap.Pixel(-11, -28)
            });
            marker.setMap(map);
            marker.setLabel({
                offset: new AMap.Pixel(-10, -5),  //设置文本标注偏移量
                content: "<div class='info'>"+points[i].formattedAddress+"</div>", //设置文本标注内容
                direction: 'right' //设置文本标注方位
            });
        }
    }  
}  

// 批量地址解析
function AGEO() {
    if (index < adds.length) {
        var add = adds[index];
        geoCode(add);
        index++;
    } else {
        console.log(points)
        addMarker(points); // 绘制图标
        createPolyline (points); // 绘制折线
        var newCenter = map.setFitView();
    }
}

function geoCode(add) {
    if(index < adds.length){
        setTimeout(window.bdGEO,400);
    }
    geocoder.getLocation(add, function(status, result) {
        if (status === 'complete'&&result.geocodes.length) {
            points.push(result.geocodes[0])
        }else{
            log.error('根据地址查询位置失败');
        }
    });
}

function createPolyline(points) {
    var polylinePath = []
    for (var i = 0,pointsLen = points.length;i <pointsLen;i++) {  
        polylinePath[i] = new AMap.LngLat(points[i].location.lng,points[i].location.lat);   
    }
    console.log(polylinePath )
    // 创建线覆盖物
    var polyline = new AMap.Polyline({
        path: polylinePath
    });
    map.add([polyline]);
}


var map = new AMap.Map("container", {
    resizeEnable: true
});
var geocoder = new AMap.Geocoder({
    city: "全国", 
});
var index = 0;
AGEO()