我有一个指令,这是代码:
.directive('map', function() {
return {
restrict: 'E',
replace: true,
template: '<div></div>',
link: function($scope, element, attrs) {
var center = new google.maps.LatLng(50.1, 14.4);
$scope.map_options = {
zoom: 14,
center: center,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
// create map
var map = new google.maps.Map(document.getElementById(attrs.id), $scope.map_options);
var dirService= new google.maps.DirectionsService();
var dirRenderer= new google.maps.DirectionsRenderer()
var showDirections = function(dirResult, dirStatus) {
if (dirStatus != google.maps.DirectionsStatus.OK) {
alert('Directions failed: ' + dirStatus);
return;
}
// Show directions
dirRenderer.setMap(map);
//$scope.dirRenderer.setPanel(Demo.dirContainer);
dirRenderer.setDirections(dirResult);
};
// Watch
var updateMap = function(){
dirService.route($scope.dirRequest, showDirections);
};
$scope.$watch('dirRequest.origin', updateMap);
google.maps.event.addListener(map, 'zoom_changed', function() {
$scope.map_options.zoom = map.getZoom();
});
dirService.route($scope.dirRequest, showDirections);
}
}
})
我想在用户操作上调用updateMap()。操作按钮不在指令上。
从控制器调用updateMap()的最佳方法是什么?
您可以指定一个DOM属性,该属性可用于允许指令在父作用域上定义函数。然后父作用域可以像调用其他方法一样调用此方法。这是一个活塞。下面是相关代码。
Clearfn是指令元素上的一个属性,父作用域可以将一个作用域属性传递给它,然后指令可以将该作用域属性设置为一个完成所需行为的函数。
<!DOCTYPE html>
<html ng-app="myapp">
<head>
<script data-require="angular.js@*" data-semver="1.3.0-beta.5" src="https://code.angularjs.org/1.3.0-beta.5/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<style>
my-box{
display:block;
border:solid 1px #aaa;
min-width:50px;
min-height:50px;
padding:.5em;
margin:1em;
outline:0px;
box-shadow:inset 0px 0px .4em #aaa;
}
</style>
</head>
<body ng-controller="mycontroller">
<h1>Call method on directive</h1>
<button ng-click="clear()">Clear</button>
<my-box clearfn="clear" contentEditable=true></my-box>
<script>
var app = angular.module('myapp', []);
app.controller('mycontroller', function($scope){
});
app.directive('myBox', function(){
return {
restrict: 'E',
scope: {
clearFn: '=clearfn'
},
template: '',
link: function(scope, element, attrs){
element.html('Hello World!');
scope.clearFn = function(){
element.html('');
};
}
}
});
</script>
</body>
</html>
您可以指定一个DOM属性,该属性可用于允许指令在父作用域上定义函数。然后父作用域可以像调用其他方法一样调用此方法。这是一个活塞。下面是相关代码。
Clearfn是指令元素上的一个属性,父作用域可以将一个作用域属性传递给它,然后指令可以将该作用域属性设置为一个完成所需行为的函数。
<!DOCTYPE html>
<html ng-app="myapp">
<head>
<script data-require="angular.js@*" data-semver="1.3.0-beta.5" src="https://code.angularjs.org/1.3.0-beta.5/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<style>
my-box{
display:block;
border:solid 1px #aaa;
min-width:50px;
min-height:50px;
padding:.5em;
margin:1em;
outline:0px;
box-shadow:inset 0px 0px .4em #aaa;
}
</style>
</head>
<body ng-controller="mycontroller">
<h1>Call method on directive</h1>
<button ng-click="clear()">Clear</button>
<my-box clearfn="clear" contentEditable=true></my-box>
<script>
var app = angular.module('myapp', []);
app.controller('mycontroller', function($scope){
});
app.directive('myBox', function(){
return {
restrict: 'E',
scope: {
clearFn: '=clearfn'
},
template: '',
link: function(scope, element, attrs){
element.html('Hello World!');
scope.clearFn = function(){
element.html('');
};
}
}
});
</script>
</body>
</html>
你可以把方法名告诉指令来定义你想从控制器调用哪个,但没有隔离作用域,
angular.module("app", [])
.directive("palyer", [
function() {
return {
restrict: "A",
template:'<div class="player"><span ng-bind="text"></span></div>',
link: function($scope, element, attr) {
if (attr.toPlay) {
$scope[attr.toPlay] = function(name) {
$scope.text = name + " playing...";
}
}
}
};
}
])
.controller("playerController", ["$scope",
function($scope) {
$scope.clickPlay = function() {
$scope.play('AR Song');
};
}
]);
.player{
border:1px solid;
padding: 10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
<div ng-controller="playerController">
<p>Click play button to play
<p>
<p palyer="" to-play="play"></p>
<button ng-click="clickPlay()">Play</button>
</div>
</div>
基于Oliver的回答-你可能并不总是需要访问指令的内部方法,在这种情况下,你可能不想创建一个空白对象,并添加一个控件attr到指令,只是为了防止它抛出错误(不能设置属性“takeTablet”为undefined)。
你也可能想在指令的其他地方使用这个方法。
我会加上一个检查,以确保范围。控件存在,并以与显示模块模式类似的方式为其设置方法
app.directive('focusin', function factory() {
return {
restrict: 'E',
replace: true,
template: '<div>A:{{control}}</div>',
scope: {
control: '='
},
link : function (scope, element, attrs) {
var takenTablets = 0;
var takeTablet = function() {
takenTablets += 1;
}
if (scope.control) {
scope.control = {
takeTablet: takeTablet
};
}
}
};
});
下面的解决方案将是有用的,当你有'控制器As'格式的控制器(父控制器和指令(隔离))
有人可能会觉得这很有用,
指令:
var directive = {
link: link,
restrict: 'E',
replace: true,
scope: {
clearFilters: '='
},
templateUrl: "/temp.html",
bindToController: true,
controller: ProjectCustomAttributesController,
controllerAs: 'vmd'
};
return directive;
function link(scope, element, attrs) {
scope.vmd.clearFilters = scope.vmd.SetFitlersToDefaultValue;
}
}
控制器:
function DirectiveController($location, dbConnection, uiUtility) {
vmd.SetFitlersToDefaultValue = SetFitlersToDefaultValue;
function SetFitlersToDefaultValue() {
//your logic
}
}
HTML代码:
<Test-directive clear-filters="vm.ClearFilters"></Test-directive>
<a class="pull-right" style="cursor: pointer" ng-click="vm.ClearFilters()"><u>Clear</u></a>
//this button is from parent controller which will call directive controller function