页面加载时，我需要启动两个javascript函数。
用于初始化Google地图的功能：
function initialize() {
var myLatLng = new google.maps.LatLng(52.015460,18.498087);
var myOptions = {
zoom: 6,
center: myLatLng,
mapTypeId: 'hybrid',
clickableIcons: false
};
}
在地图初始化和页面加载时自动聚焦于输入字段的功能：
function inputfocus() {
document.getElementById("pac-input").focus();
}
要启动上述功能，我正在使用以下代码：
function start() {
initialize();
inputfocus();
}
window.onload = start;
我面临的问题是，这些函数可以单独正常工作，但按上述顺序，只有第一个触发（即仅加载地图）。
我已经阅读并测试了stackoverflow和其他网站上提供的许多想法，但没有一个起作用。
如果您对解决此问题有任何想法，请告诉我。
一个演示示例如下（需要添加Google Maps自己的密钥）：
<!DOCTYPE html>
<html>
<head>
<title>test</title>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<style>
#mapindex {
height: 400px;
width: 100%;
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?key=yourapikeygoeshere&libraries=places&types=(cities)" ></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- Google Maps API -->
<script>
function initialize() {
var myLatLng = new google.maps.LatLng(52.015460,18.498087); // Map is centered here
var myOptions = {
zoom: 6,
center: myLatLng,
mapTypeId: 'hybrid',
clickableIcons: false
};
map = new google.maps.Map(document.getElementById("mapindex"), myOptions);
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function() {
searchBox.setBounds(map.getBounds());
});
var markers = [];
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
markers.forEach(function(marker) {
marker.setMap(null);
});
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function(place) {
if (!place.geometry) {
console.log("Returned place contains no geometry");
return;
}
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
var image = 'http://www.instead.com.pl/target2.png';
markers.push(new google.maps.Marker({
map: map,
icon: image,
title: place.name,
position: place.geometry.location
}));
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
});
map.fitBounds(bounds);
});
}
</script>
<script>
function inputFocus() {
document.getElementById("pac-input").focus();
}
</script>
<script>
function start() {
initialize();
inputFocus();
}
window.onload = start;
</script>
</head>
<body>
<input id="pac-input" class="controls" type="text" placeholder="Enter location" value="<?php if(isset ($_GET['local'])){ echo $_GET['local'];}?>"/>
<div id="mapindex"></div>
</body>
</html>
答案 0 :(得分：0)
如果我在setFocus上添加延迟（如Sergii Vorobei在评论中所建议），那么它会起作用。
google.maps.event.addListenerOnce(map, 'idle', function(){
setTimeout(inputFocus, 1000);
});
（您可能不需要“空闲”事件侦听器，但可能更安全）
代码段：
#mapindex {
height: 400px;
width: 100%;
}<script src="https://maps.googleapis.com/maps/api/js?libraries=places&types=(cities)"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- Google Maps API -->
<script>
function initialize() {
var myLatLng = new google.maps.LatLng(52.015460, 18.498087); // Map is centered here
var myOptions = {
zoom: 6,
center: myLatLng,
mapTypeId: 'hybrid',
clickableIcons: false
};
function inputFocus() {
document.getElementById("pac-input").focus();
}
map = new google.maps.Map(document.getElementById("mapindex"), myOptions);
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function() {
searchBox.setBounds(map.getBounds());
});
var markers = [];
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
markers.forEach(function(marker) {
marker.setMap(null);
});
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function(place) {
if (!place.geometry) {
console.log("Returned place contains no geometry");
return;
}
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
var image = 'http://www.instead.com.pl/target2.png';
markers.push(new google.maps.Marker({
map: map,
icon: image,
title: place.name,
position: place.geometry.location
}));
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
});
map.fitBounds(bounds);
});
google.maps.event.addListenerOnce(map, 'idle', function() {
// inputFocus();
setTimeout(inputFocus, 1000);
});
}
</script>
<script>
function start() {
initialize();
}
window.onload = start;
</script>
<input id="pac-input" class="controls" type="text" placeholder="Enter location" value="Nebraska" />
<div id="mapindex"></div>