访问控制器方法是指从指令controller/link/scope访问父作用域上的方法。
如果该指令共享/继承父作用域，那么直接调用父作用域方法就可以了。
当你想要从隔离指令作用域访问父作用域方法时，需要做更多的工作。
有几个选项(可能比下面列出的更多)可以从孤立的指令作用域调用父作用域方法或监视父作用域变量(特别是选项#6)。
注意，我在这些例子中使用了链接函数，但你也可以根据需要使用指令控制器。
选择# 1。通过对象文字和从指令html模板
index . html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged(selectedItems)" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" ng-change="selectedItemsChanged({selectedItems:selectedItems})" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html"
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnedFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/rgKUsYGDo9O3tewL6xgr?p=preview
选项# 2。通过对象文字和从指令link/scope
index . html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged(selectedItems)" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;"
ng-change="selectedItemsChangedDir()" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html",
link: function (scope, element, attrs){
scope.selectedItemsChangedDir = function(){
scope.selectedItemsChanged({selectedItems:scope.selectedItems});
}
}
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnedFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/BRvYm2SpSpBK9uxNIcTa?p=preview
选项# 3。通过函数引用和从指令html模板
index . html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;"
ng-change="selectedItemsChanged()(selectedItems)" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems:'=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html"
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/Jo6FcYfVXCCg3vH42BIz?p=preview
选项# 4。通过函数引用和从指令链接/范围
index . html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" ng-change="selectedItemsChangedDir()" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html",
link: function (scope, element, attrs){
scope.selectedItemsChangedDir = function(){
scope.selectedItemsChanged()(scope.selectedItems);
}
}
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnedFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/BSqx2J1yCY86IJwAnQF1?p=preview
选项#5:通过ng-model和双向绑定，你可以更新父作用域变量。因此，在某些情况下，您可能不需要调用父作用域函数。
index . html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter ng-model="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItems}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;"
ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=ngModel'
},
templateUrl: "itemfilterTemplate.html"
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/hNui3xgzdTnfcdzljihY?p=preview
选项#6:通过$watch和$watchCollection
以上所有例子中的项都是双向绑定，如果父作用域中的项被修改，指令中的项也会反映这些更改。
如果你想从父范围观察其他属性或对象，你可以使用$watch和$watchCollection，如下所示
html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>
document.write('<base href="' + document.location + '" />');
</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{user}}!</p>
<p>directive is watching name and current item</p>
<table>
<tr>
<td>Id:</td>
<td>
<input type="text" ng-model="id" />
</td>
</tr>
<tr>
<td>Name:</td>
<td>
<input type="text" ng-model="name" />
</td>
</tr>
<tr>
<td>Model:</td>
<td>
<input type="text" ng-model="model" />
</td>
</tr>
</table>
<button style="margin-left:50px" type="buttun" ng-click="addItem()">Add Item</button>
<p>Directive Contents</p>
<sd-items-filter ng-model="selectedItems" current-item="currentItem" name="{{name}}" selected-items-changed="selectedItemsChanged" items="items"></sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItems}}</p>
</body>
</html>
脚本app.js
Var app = angular。模块(“恰好”,[]);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
name: '@',
currentItem: '=',
items: '=',
selectedItems: '=ngModel'
},
template: '<select ng-model="selectedItems" multiple="multiple" style="height: 140px; width: 250px;"' +
'ng-options="item.id as item.name group by item.model for item in items | orderBy:\'name\'">' +
'<option>--</option> </select>',
link: function(scope, element, attrs) {
scope.$watchCollection('currentItem', function() {
console.log(JSON.stringify(scope.currentItem));
});
scope.$watch('name', function() {
console.log(JSON.stringify(scope.name));
});
}
}
})
app.controller('MainCtrl', function($scope) {
$scope.user = 'World';
$scope.addItem = function() {
$scope.items.push({
id: $scope.id,
name: $scope.name,
model: $scope.model
});
$scope.currentItem = {};
$scope.currentItem.id = $scope.id;
$scope.currentItem.name = $scope.name;
$scope.currentItem.model = $scope.model;
}
$scope.selectedItems = ["allItems"];
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
你总是可以参考AngularJs文档来获得关于指令的详细解释。
