javascript - 使用标记使 Google map 以响应式调整大小为中心

Question

我正在尝试让 Google map 在响应式调整大小时保持其中心位置。

我已经设法让 map 居中，但不知道如何将我的标记重新添加到 JS 中以使其也居中。我正在使用此处的代码进行 map 居中... Google maps responsive resize

var map; //<-- This is now available to both event listeners and the initialize() function
function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(LAT,LNG),
        zoom: 10,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        mapTypeControl: false,
        scrollwheel: false,
        keyboardShortcuts: false,
    };

map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);}

google.maps.event.addDomListener(window, 'load', initialize);

google.maps.event.addDomListener(window, "resize", function() {
    var center = map.getCenter();
    google.maps.event.trigger(map, "resize");
    map.setCenter(center); 
});

上面是我用来使 map 居中的代码。我也有下面的标记代码，但我不确定如何添加它以使其也保持其中心。

var marker = new google.maps.Marker({
        position: new google.maps.LatLng(LAT,LNG),
        map: map,
        title: 'Title',
        animation: google.maps.Animation.DROP,
        })
    }

有人可以帮忙吗？

Answer 1

这是获得您想做的事情的第一步:

var map; //<-- This is now available to both event listeners and the initialize() function
var mapCenter; // Declare a variable to store the center of the map
var centerMarker; // declare your marker

function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(LAT,LNG),
        zoom: 10,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        mapTypeControl: false,
        scrollwheel: false,
        keyboardShortcuts: false,
    };

    map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);

    // Create a new marker and add it to the map
    centerMarker = new google.maps.Marker({
        position: new google.maps.LatLng(LAT,LNG),
        map: map,
        title: 'Title',
        animation: google.maps.Animation.DROP
    });

    mapCenter = map.getCenter(); // Assign the center of the loaded map to the valiable
}



google.maps.event.addDomListener(window, 'load', initialize);

google.maps.event.addDomListener(window, "resize", function() {

    // Here you set the center of the map based on your "mapCenter" variable
    map.setCenter(mapCenter); 
});

编辑基于@Chad Killingsworth 评论:您可能希望向 map 添加“空闲”事件处理程序以设置 mapCenter 变量。你可以这样实现:

google.maps.event.addListener(map,'idle',function(event) {
    mapCenter = map.getCenter();
});

文档中“空闲”事件的描述:

This event is fired when the map becomes idle after panning or zooming.