我正在尝试使用 API 将自定义控件添加到 Google 地图。我已经添加了两个自定义控件,它们工作得很好。我试图复制并粘贴第三个控件的代码(当然是更改相关变量),但我不断收到上述错误(在标题中)。
Chrome 控制台和 Firebug 似乎没有指出特定问题(它在谷歌地图 api 代码中中断)。通过逐步注释掉行,我将其缩小到这一特定行:
map.controls[google.maps.ControlPosition.TOP_RIGHT].push(churchControlDiv);
添加控件的完整代码如下:
function ChurchControl(churchControlDiv, map) {
churchControlDiv.style.padding = '5px 0px';
var churchControlUI = document.createElement('DIV');
churchControlUI.style.backgroundColor = 'white';
churchControlUI.style.borderStyle = 'solid';
churchControlUI.style.borderWidth = '1px';
churchControlUI.style.borderColor = 'gray';
churchControlUI.style.boxShadow = 'rgba(0, 0, 0, 0.398438) 0px 2px 4px';
churchControlUI.style.cursor = 'pointer';
churchControlUI.style.textAlign = 'center';
churchControlUI.title = 'Click to see Churches';
churchControlDiv.appendChild(churchControlUI);
var churchControlText = document.createElement('DIV');
churchControlText.style.fontFamily = 'Arial,sans-serif';
churchControlText.style.fontSize = '13px';
churchControlText.style.padding = '1px 6px';
churchControlText.style.fontWeight = 'bold';
churchControlText.innerHTML = 'Churches<br>แสดงจำนวนคริสเตียน';
churchControlUI.appendChild(churchControlText);
google.maps.event.addDomListener(churchControlUI, 'click', function() {
toggle(churches);
if (churchControlText.style.fontWeight == 'bold') {
churchControlText.style.fontWeight = 'normal';
} else {
churchControlText.style.fontWeight = 'bold';
}
});
google.maps.event.addDomListener(churchControlUI, 'mouseover', function() {
churchControlUI.style.backgroundColor = '#e8e8e8';
});
google.maps.event.addDomListener(churchControlUI, 'mouseout', function() {
churchControlUI.style.backgroundColor = 'white';
});
}
function initialize(){
map = new google.maps.Map(document.getElementById("map_canvas"), {
center: centerLatLng,
zoom: 7,
streetViewControl: false,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var churchControlDiv = document.createElement('DIV');
var churchControlDiv = new ChurchControl(churchControlDiv, map);
churchControlDiv.index = 3;
map.controls[google.maps.ControlPosition.TOP_RIGHT].push(churchControlDiv);
}
有任何想法吗?为什么有 3 个控件会成为问题?