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javascript - 我如何在 Mapbox GL JS 的 setHtml 中设置事件?

转载 作者:行者123 更新时间:2023-11-27 22:59:37 28 4
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我在使用以下示例时遇到问题:

mapboxgl.accessToken = 'pk.eyJ1IjoicGFwYWJ1Y2t0IiwiYSI6ImNqa2k3azQ1dzA1Zmgza3B1czIxOGhhaW4ifQ.h5OT3NaQf0vcxx3g1q1cXw';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v9',
zoom: 5,
center: [-77.04, 38.907],
});
map.on('load', function() {

map.addLayer({
"id": "places",
"type": "symbol",
"source": {
"type": "geojson",
"data": {
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"properties": {
"id" : 1,
"name" :"My Icon",
"icon": "theatre"
},
"geometry": {
"type": "Point",
"coordinates": [-77.038659, 38.931567]
}
}]
}
},
"layout": {
"icon-image": "ferry-15",
"icon-allow-overlap": true
}
});

map.on('click', 'places', function (e) {
var coordinates = e.features[0].geometry.coordinates.slice();
var id = e.features[0].properties.id;
var name = e.features[0].properties.name;

while (Math.abs(e.lngLat.lng - coordinates[0]) > 180) {
coordinates[0] += e.lngLat.lng > coordinates[0] ? 360 : -360;
}

new mapboxgl.Popup()
.setLngLat(coordinates)
.setHTML("<table>" +
"<tr>" +
"<td>ID</td>" +
"<td>:</td>" +
"<td>"+id+"</td>" +
"</tr>" +
"<tr>" +
"<td>Name</td>" +
"<td>:</td>" +
"<td>"+name+"</td>" +
"</tr>" +
"</table>" +
"<button type='button' onclick='"+alert("Success")+"'>This Button</button>"

)
.addTo(map);
});

map.on('mouseenter', 'places', function () {
map.getCanvas().style.cursor = 'pointer';
});

// Change it back to a pointer when it leaves.
map.on('mouseleave', 'places', function () {
map.getCanvas().style.cursor = '';
});


});
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>WEBAPP</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.50.0/mapbox-gl.js'></script>
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.50.0/mapbox-gl.css' rel='stylesheet' />
</head>
<body>
<div id='map'></div>
</body>
</html>

我的问题是,我不知道这是错误,还是我写错了代码。我期待的结果是当我点击船图标,然后点击名为“This Button”的按钮时,会显示一条警报。但是在这段代码中,当我点击 ship 图标时,会显示一个警告,然后弹出。虽然我已经在 setHtml 中设置了 onclick 事件。
我该如何解决 ?谢谢

最佳答案

您连接 HTML 字符串的方式有问题。当您添加 +alert("Success")+"

在将其呈现为 HTML 字符串之前,您实际上是在调用函数 alert

如果你把它替换成

"<button type='button' onclick=alert('Success')>This Button</button>"

您会看到它起作用了,因为字符串的构造得到了更正。

我建议您用模板字面量替换连接 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals干净多了

例子:

.setHTML(`<table> 
<tr>
<td>ID</td>
<td>:</td>
<td>${id}</td>
</tr>
<tr>
<td>Name</td>
<td>:</td>
<td>${name}</td>
</tr>
</table>
<button type="button" onclick="alert('Success on ${name} ${id})">This Button</button>`)

mapboxgl.accessToken = 'pk.eyJ1IjoicGFwYWJ1Y2t0IiwiYSI6ImNqa2k3azQ1dzA1Zmgza3B1czIxOGhhaW4ifQ.h5OT3NaQf0vcxx3g1q1cXw';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v9',
zoom: 5,
center: [-77.04, 38.907],
});
map.on('load', function() {

map.addLayer({
"id": "places",
"type": "symbol",
"source": {
"type": "geojson",
"data": {
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"properties": {
"id" : 1,
"name" :"My Icon",
"icon": "theatre"
},
"geometry": {
"type": "Point",
"coordinates": [-77.038659, 38.931567]
}
}]
}
},
"layout": {
"icon-image": "ferry-15",
"icon-allow-overlap": true
}
});

map.on('click', 'places', function (e) {
var coordinates = e.features[0].geometry.coordinates.slice();
var id = e.features[0].properties.id;
var name = e.features[0].properties.name;

while (Math.abs(e.lngLat.lng - coordinates[0]) > 180) {
coordinates[0] += e.lngLat.lng > coordinates[0] ? 360 : -360;
}

new mapboxgl.Popup()
.setLngLat(coordinates)
.setHTML(`<table>
<tr>
<td>ID</td>
<td>:</td>
<td>${id}</td>
</tr>
<tr>
<td>Name</td>
<td>:</td>
<td>${name}</td>
</tr>
</table>
<button type="button" onclick="alert('Success on ${name}')">This Button</button>`)

.addTo(map);
});

map.on('mouseenter', 'places', function () {
map.getCanvas().style.cursor = 'pointer';
});

// Change it back to a pointer when it leaves.
map.on('mouseleave', 'places', function () {
map.getCanvas().style.cursor = '';
});


});
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>WEBAPP</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.50.0/mapbox-gl.js'></script>
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.50.0/mapbox-gl.css' rel='stylesheet' />
</head>
<body>
<div id='map'></div>
</body>
</html>

关于javascript - 我如何在 Mapbox GL JS 的 setHtml 中设置事件?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53275439/

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