遵循 Google Maps API 中的示例代码(为简洁而 chop )如何检查标记图像加载失败并使用不同/默认图像?
var image = {
url: 'https://broken.url.com/no-such-image.png',
size: new google.maps.Size(20, 32),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(0, 32)
};
var marker = new google.maps.Marker({
position: {lat: -33.890542, lng: 151.274856},
map: map,
icon: image,
title: 'Marker demo',
zIndex: 1
});
最佳答案
您可以尝试使用javascript来加载图像。如果可以加载(触发onload
事件),则添加带有图像的标记,否则(触发onerror
事件)回退到其他内容(例如没有图像的默认标记) :
var image = new Image();
var image_url = "https://broken.url.com/no-such-image.png";
image.onload = function () {
console.info("Image loaded, adding marker with image !");
var marker = new google.maps.Marker({
position: {lat: -33.890542, lng: 151.274856},
map: map,
icon: {
url: image_url,
size: new google.maps.Size(20, 32),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(0, 32)
},
title: 'Marker demo',
zIndex: 1
});
}
image.onerror = function () {
console.error("Cannot load image, adding marker without image");
var marker = new google.maps.Marker({
position: {lat: -33.890542, lng: 151.274856},
map: map,
title: 'Marker demo',
zIndex: 1
});
}
image.src = image_url;
关于javascript - 如何检测谷歌地图标记图像无法加载以提供默认图像?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39206804/