这是一个显示我正在尝试做的事情的jsFiddle:http://jsfiddle.net/P3c7c
我正在使用Google Places AutoComplete小部件来获取纬度/经度坐标,然后我希望在后续搜索功能中使用它。考虑到需要向元素添加事件监听器,似乎实现这一点的正确方法是使用指令,并使用指令的链接函数附加监听器。但是,在这个监听器内部,我需要它来设置SearchForm控制器的位置属性,它是它的父级。我还没弄明白如何建立这种联系。这是相关的代码块:
/* Controllers */
function SearchForm($scope){
$scope.location = ''; // <-- this is the prop I wish to update from within the directive
$scope.doSearch = function(){
if($scope.location === ''){
alert('Directive did not update the location property in parent controller.');
} else {
alert('Yay. Location: ' + $scope.location);
}
};
}
/* Directives */
angular.module('OtdDirectives', []).
directive('googlePlaces', function(){
return {
restrict:'E',
replace:true,
transclude:true,
scope: {location:'=location'}, // <--prob something wrong here? i tried @/& too, no luck
template: '<input id="google_places_ac" name="google_places_ac" type="text" class="input-block-level"/>',
link: function($scope, elm, attrs, ctrl){
var autocomplete = new google.maps.places.Autocomplete($("#google_places_ac")[0], {});
google.maps.event.addListener(autocomplete, 'place_changed', function() {
var place = autocomplete.getPlace();
// THIS IS THE STRING I WANT TO SAVE TO THE PARENT CONTROLLER
var location = place.geometry.location.lat() + ',' + place.geometry.location.lng();
// THIS IS NOT DOING WHAT I EXPECT IT TO DO:
$scope.location = location;
});
}
}
});
提前致谢。
答案 0 :(得分:3)
两个小的修正,它应该有效:
<google-places location="location"></google-places>
当您在指令中设置位置时,您还需要执行$scope.$apply()
$scope.$apply(function() {
$scope.location = location;
});
你必须做$apply()
因为事件发生在角度摘要循环之外,所以你必须让角度知道范围内的某些东西已经改变,它需要“消化”它的双向绑定和其他内部异步的东西。
此外,我认为您不需要transclude:true
。