我正在尝试更新一个属性(这是一个函数)，以在 bing map API 中设置图钉。
我想固定 bool 属性“setLocation”设置为 true 的项目。如果我对 bool 值进行硬编码，则这是有效的，但如果该值在应用程序中发生更改，则引脚不会在 map 中更新。
这是 html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Ember Starter Kit</title>
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/normalize/3.0.1/normalize.css">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="http://builds.handlebarsjs.com.s3.amazonaws.com/handlebars-v2.0.0.js"></script>
<script src="http://builds.emberjs.com/tags/v1.9.1/ember.js"></script>
<script charset="UTF-8" type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=7.0"></script>
</head>
<body>
<script type="text/x-handlebars">
<h2>Welcome to Ember.js</h2>
{{outlet}}
</script>
<script type="text/x-handlebars" data-template-name="index">
{{#each id in model}}
{{input type='checkbox' checked=id.setLocation}}Location{{id.id}}
{{/each}}
{{bing-map height=590 pins=model}}
</script>
</body>
</html>
JavaScript:
App = Ember.Application.create();
App.Router.map(function() {
// put your routes here
});
App.IndexRoute = Ember.Route.extend({
model: function() {
return App.COORD;
}
});
App.COORD=[
{
id:1,
latitude: 34.05,
longitude: -118.25,
setLocation: true
},
{
id:2,
latitude: 25.77,
longitude: -80.19,
setLocation: true
},
{
id:3,
latitude: 28.53,
longitude: -81.37,
setLocation: true
}
];
App.BingMapComponent = Ember.Component.extend({
attributeBindings: ['style'],
classNames: ['bing-map'],
bingKey: "AkmMkZ5YpX8xsXHY4uBxD8Gz2S5f3GkTRebOw0t4voyb7gFryc0ElW4toY3cJbTt",
width: '45%',
height: '100%',
latitude: 0,
longitude: 0,
latitudePin:undefined,
longitudePin:undefined,
zoom: 1,
pins: null, // passed in from controller
mapTypeId: 'r', // r:road, a:aerial
init: function(){
this._super();
if (!this.get('bingKey')){
throw('Missing bingKey');
}
this.api = Microsoft.Maps;
this.map = null;
},
style: function(){
return "position: relative; width: %@px; height: %@px".fmt(
this.get('width'),
this.get('height')
);
}.property('width', 'height'),
center: function(){
var latitude = parseFloat(this.get('latitude'));
var longitude = parseFloat(this.get('longitude'));
longitude = this.api.Location.normalizeLongitude(longitude);
return new this.api.Location(latitude, longitude);
}.property('latitude', 'longitude'),
mapOptions: function(){
return {
center: this.get('center'),
zoom: parseInt(this.get('zoom'),10),
mapTypeId: this.get('mapTypeId')
};
}.property('center','zoom','mapTypeId'),
createMap: function(){
var el = this.$()[0];
var options = this.get('mapOptions');
options.credentials = this.get('bingKey');
this.map = new Microsoft.Maps.Map(el, options);
var getPin = this.get('getPin');
for(var i=0; i<getPin.length; i++){
var pin = new Microsoft.Maps.Pushpin(getPin[i]);
this.map.entities.push(pin);
}
}.on('didInsertElement'),
getPin: function(){
var pins = this.get('pins');
var location=[];
pins.forEach(function(pin){
if(pin.setLocation){
location.push(new Microsoft.Maps.Location(pin.latitude, pin.longitude));
}
});
return location;
}.property('pins'),
removeMap: function(){
this.map.dispose();
}.on('willDestroyElement'),
});
提前致谢
最佳答案
有几件事:
- 您仅在 map 上绘制图钉一次
on('didInsertElement')这仅在组件第一次在屏幕上呈现时调用。 - 由于
pins是一个数组，因此您需要使用pins.@each.setLocation来监视每个元素的setLocation属性的更改(参见here)
您可以执行以下操作:
// Observer that calls createMap() any time setLocation changes
pinObserver: function(){
this.createMap();
// NOTICE HOW THIS IS USING @each
}.observes('pins.@each.setLocation'),
getPin: function(){
var pins = this.get('pins');
var location=[];
pins.forEach(function(pin){
if(pin.setLocation){
location.push(new Microsoft.Maps.Location(pin.latitude, pin.longitude));
}
});
return location;
// NOTICE HOW THIS IS USING @each
}.property('pins.@each.setLocation'),
工作演示 here
关于javascript - 使用复选框有条件地更新 Bing map 上的标记，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28300302/