Canvas作为切片

使用TileLayer.Flexible.createTile将canvas作为切片渲染到地图上，适用于需要自定义切片的场景。

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          <!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <title>TileLayer.Flexible</title>
    <style>
        html,
        body,
        #container {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
        }
    </style>
</head>
<body>
<div id="container"></div>
<script src="//cache.amap.com/lbs/static/es5.min.js"></script>
<script src="//webapi.amap.com/maps?v=1.4.15&key=您申请的key值"></script>
<script>
    var map = new AMap.Map('container', {
        resizeEnable: true,
        zoom: 14,
        zooms: [3, 20],
        expandZoomRange: true
    });

    var layer = new AMap.TileLayer.Flexible({
        cacheSize: 30,
        zIndex: 200,
        createTile: function (x, y, z, success, fail) {
            var c = document.createElement('canvas');
            c.width = c.height = 256;

            var cxt = c.getContext("2d");
            cxt.font = "15px Verdana";
            cxt.fillStyle = "#ff0000";
            cxt.strokeStyle = "#FF0000";
            cxt.strokeRect(0, 0, 256, 256);
            cxt.fillText('(' + [x, y, z].join(',') + ')', 10, 30);

            // 通知API切片创建完成
            success(c);
        }
    });

    layer.setMap(map);

</script>
</body>
</html>
        

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