Javascript &引用;无法读取属性';zindex';“未定义”的定义;谷歌地图
我正在尝试使用API向Google地图添加自定义控件。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(当然要更改相关变量),但我一直得到上面的错误(在标题中) Chrome控制台和Firebug似乎没有指出一个特定的问题(它在GoogleMapsAPI代码中被破坏)。通过逐行注释,我将其缩小到以下特定行:Javascript &引用;无法读取属性';zindex';“未定义”的定义;谷歌地图,javascript,google-maps-api-3,Javascript,Google Maps Api 3,我正在尝试使用API向Google地图添加自定义控件。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(当然要更改相关变量),但我一直得到上面的错误(在标题中) Chrome控制台和Firebug似乎没有指出一个特定的问题(它在GoogleMapsAPI代码中被破坏)。通过逐行注释,我将其缩小到以下特定行: map.controls[google.maps.ControlPosition.TOP_RIGHT].push(churchControlDiv); 添加控件
map.controls[google.maps.ControlPosition.TOP_RIGHT].push(churchControlDiv);
添加控件的完整代码如下所示:
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);
}
功能ChurchControl(churchControlDiv,地图){
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='单击以查看教堂';
churchControlDiv.appendChild(churchControlUI);
var churchControlText=document.createElement('DIV');
churchControlText.style.fontFamily='Arial,无衬线';
churchControlText.style.fontSize='13px';
churchControlText.style.padding='1px 6px';
churchControlText.style.fontWeight='bold';
churchControlText.innerHTML='Churchks
แสดงจำนวนคริสเตียน';
churchControlUI.appendChild(churchControlText);
google.maps.event.addDomListener(churchControlUI,'click',function(){
切换(教堂);
如果(churchControlText.style.fontWeight=='bold'){
churchControlText.style.fontWeight='normal';
}否则{
churchControlText.style.fontWeight='bold';
}
});
google.maps.event.addDomListener(churchControlUI,'mouseover',function(){
churchControlUI.style.backgroundColor='#e8e8e8';
});
google.maps.event.addDomainListener(churchControlUI,'mouseout',function()){
churchControlUI.style.backgroundColor='white';
});
}
函数初始化(){
map=new google.maps.map(document.getElementById(“map_canvas”){
中心:中心板条,
缩放:7,
街景控制:错误,
mapTypeId:google.maps.mapTypeId.ROADMAP
});
var churchControlDiv=document.createElement('DIV');
var churchControlDiv=新的churchControlDiv(churchControlDiv,映射);
churchControlDiv.index=3;
map.controls[google.maps.ControlPosition.TOP\u RIGHT].push(churchControlDiv);
}
有什么想法吗?为什么有3个控件会有问题?我遵循了这一点,这与您的代码非常接近
靠近终点的这条线需要改变
var churchControlDiv = new ChurchControl(churchControlDiv, map);
将churchControlDiv
替换为churchControl
或其他名称,因为不应覆盖churchControlDiv
看这里
我用
//CHANGED
标记了我的更改,并发出了单击警报,“新建地图中心”由于不同的原因,在我的控制台上弹出了相同的错误
我没有使用默认的javascript DOM操作,而是使用jQuery来创建我的元素,例如
var controlDiv = $('<div></div>');
var controlUI = $('<div class="alert alert-info"></div>');
controlDiv.append(controlUI);
var controlText = $('<div>Control text here</div>');
controlUI.append(controlText);
另请参见:此问题的一般根本原因似乎是元素或其属性被删除或不存在。Maps API正在尝试在
style
属性中查找zIndex
我在与Maps API控件交互的Vue应用程序自定义组件中遇到了此问题。我们在拆卸部件时更加小心,从而解决了这个问题
基本上,您需要确保不向控件中添加null元素,并且在删除该元素或其属性之前不使其为null,方法是使用v-if之类的时髦工具。就是这样。谢谢当我检查并更改变量时,我必须将其更改为错误的变量。我看了很久。。。
map.controls[google.maps.ControlPosition.TOP_RIGHT].push(controlDiv[0]);