在angularjs中,我一直在尝试访问我的指令隔离范围内的主控制器$scope变量。
我的网页代码,
<body ng-controller="MainCtrl">
<div id="TestContainer" class="TestContainer" ng-init=Intialfunc()>
<collection collection='testdata'>{{testdata}}</collection>
</div>
</body>
我的指令代码,
var app = angular.module('plunker', []);
app.directive('collection', function () {
return {
restrict: "E",
replace: true,
scope: {collection: '='},
//controller: 'TreeController',
//bindToController: true,
template: "<ul><member ng-repeat='member in collection' member='member'></member></ul>"
}
})
app.directive('member', function ($compile) {
var linkerfunc = function(scope, element, attrs) {
var collectionSt = '<collection collection="member.children"></collection>';
$compile(collectionSt)(scope, function(cloned, scope) {
element.append(cloned);
});
}
return {
restrict: "E",
replace: true,
scope: {member: '=', ShowDetailsCtrlFunc : '&'},
template: "<li><span ng-click=ShowDetailsCtrlFunc()>{{member.NodeName}}</span></li>",
controller: 'MainCtrl',
//controllerAs: 'MainCtrl',
//bindToController: true,
link: linkerfunc
}
})
我的控制器代码,
app.controller('MainCtrl', function ($scope) {
$scope.Intialfunc = function() {
$scope.testdata = []
var myjsondata = JSON.parse('{ "NodeName": "Parent", "children": [ { "NodeName": "mychild", "children": [ { "NodeName": "chld1", "children": [] } ] } ] }');
$scope.testdata.push(myjsondata);
console.log($scope.testdata) //This one is showing
}
$scope.ShowDetailsCtrlFunc = function(element,event) {
console.log("in function ShowDetailsCtrlFunc"); // coming to this fucntion on click.
console.log($scope.testdata) // but this one is not showing . shows undefined.
//event.stopImmediatePropagation();
};
});
它即将进入该功能,但不显示控制器$scope。我创建了一个 plunker,
普伦克
请帮助我。我已经挣扎了很多天。
您需要将函数表达式添加到两个指令的隔离作用域,以便正确调用父作用域中的函数。使用您的原始代码,它应该看起来像这样:
var app = angular.module('plunker', []);
app.directive('collection', function () {
return {
restrict: "E",
//replace: true, <- this is deprecated and should no longer be used
scope: {
collection: '=',
onMemberClick: '&'
},
template: "<ul><member ng-repeat='member in collection' member='member' on-click='onMemberClick()'></member></ul>"
}
})
app.directive('member', function ($compile) {
return {
restrict: "E",
//replace: true, <- this is deprecated and should no longer be used
scope: {
member: '=',
onClick : '&'
},
template: "<li><span ng-click='onClick()'>{{member.NodeName}}</span></li>"
}
});
你的原始html应该看起来像这样:
<body ng-controller="MainCtrl">
<div id="TestContainer" class="TestContainer" ng-init=Intialfunc()>
<collection collection='testdata' on-member-click='ShowDetailsCtrlFunc ()'>{{testdata}}</collection>
</div>
</body>
参数绑定
如果你想知道哪个成员被点击了,你需要将参数绑定到你的函数调用。
var app = angular.module('plunker', []);
app.directive('collection', function () {
return {
restrict: "E",
scope: {
collection: '=',
onMemberClick: '&'
},
template: "<ul><member ng-repeat='member in collection' member='member' on-click='onMemberClick({member: member})'></member></ul>"
}
})
app.directive('member', function ($compile) {
return {
restrict: "E",
scope: {
member: '=',
onClick : '&'
},
template: "<li><span ng-click='onClick({member: member})'>{{member.NodeName}}</span></li>"
}
});
目录:
<body ng-controller="MainCtrl">
<div id="TestContainer" class="TestContainer" ng-init=Intialfunc()>
<collection collection='testdata' on-member-click='ShowDetailsCtrlFunc (member)'>{{testdata}}</collection>
</div>
</body>
主控制:
app.controller('MainCtrl', function ($scope) {
$scope.Intialfunc = function() {
$scope.testdata = []
var myjsondata = JSON.parse('{ "NodeName": "Parent", "children": [ { "NodeName": "mychild", "children": [ { "NodeName": "chld1", "children": [] } ] } ] }');
$scope.testdata.push(myjsondata);
console.log($scope.testdata) //This one is showing
}
$scope.ShowDetailsCtrlFunc = function(member) {
console.log("In show details function");
console.log(member);
};
});
普伦克
让我们从您拥有的查询开始。您希望从指令内的链接调用函数,即使作用域是隔离的。想要访问父范围很简单。下面是可用于访问父范围的代码。
scope.$parent.yourFun();
//or you can do this by the code give below.
//Inside Directive Use this.
scope:{
fun:"&"
},
//now you can call this function inside link
link:function(scope, element,attr){
scope.fun();
}
在你的app.directive中,只需输入scope : false
.
您的指令将使用与其父范围相同的作用域。