根据Google Maps API的示例代码(为简洁而截断),如何检查标记图像无法加载并使用其他/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
});
答案 0 :(得分:3)
您可以尝试使用javascript加载图片。如果可以加载(onload
事件被触发),请添加带图像的标记,否则(onerror
事件被触发)回退到其他内容(例如默认标记没有图像):
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;