vue异步加载高德地图的实现

<script src="//webapi.amap.com/ui/1.0/main-async.js"></script>

<script type="text/javascript">
//JSAPI回调入口
function my_init() {
initAMapUI(); //这里调用initAMapUI初始化
//其他逻辑
}
</script>

关键是UI库依赖于地图js文件，在这里，我们可以js加载完的回调onload函数和promise.all()函数来实现。loadMap.js文件如下：

export function MP(key) {
 const p1 = new Promise(function (resolve, reject) {
  window.init = function () {
   console.log('script1-------onload');
   resolve(AMap)
  };
  let script = document.createElement("script");
  script.type = "text/javascript";
  script.src = "//webapi.amap.com/maps?v=1.4.6&key="+key+"&callback=init";
  script.onerror = reject;
  document.head.appendChild(script);
 });
 const p2 = new Promise(function (resolve,reject) {
  let script2 = document.createElement("script");
  script2.type = "text/javascript";
  script2.src = "//webapi.amap.com/ui/1.0/main-async.js";
  script2.onerror = reject;
  script2.onload = function(su){
   console.log('script2-------onload',su);
   resolve('success')
  };
  document.head.appendChild(script2);
 });
 return Promise.all([p1,p2])
  .then(function (result) {
   console.log('result----------->',result);
   return result[0]  }).catch(e=>{
   console.log(e);})
};

promise.all中的then的成功回调返回rusult是一个数组，分别代表p1和p2的结果，这里只返回p1的结果（map对象）就可以了。