如何使用 angularjs 将 $scope 变量从控制器传递到指令
How to pass $scope variable from controller to directive using angularjs
我做了一个打印对象的简单指令:
var app = angular.module("myApp", []);
app.controller('myCtrl', function($scope) {
$scope.users=[
{name:'davidi',age:'23'},
{name:'karen',age:'43'},
{name:'lior',age:'22'}
];
});
app.directive("appCustomer", function() {
var htmlcode="<p ng-repeat='user in customerInfo'>{{user.name}}</p>\
";
return {
restrict: 'E',
scope: {
customerInfo: '=info'
},
template : htmlcode
};
});
我的html代码:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body ng-app="myApp">
<div ng-controller="myCtrl">
<app-customer info="users"></app-customer>
</div>
</body>
</html>
<script src="angularapp.js"></script>
我只想在我的指令中访问 $scope.users 来打印没有 ng-repeat 的用户对象,
所以我这样做了:
var app = angular.module("myApp", []);
app.controller('myCtrl', function($scope) {
$scope.users=[
{name:'davidi',age:'23'},
{name:'karen',age:'43'},
{name:'lior',age:'22'}
];
});
app.directive("appCustomer", function() {
var htmlcode="";
var userslength=3;
for(var i=0;i<userslength;i++)
{
htmlcode=htmlcode+"<p>{{users["+i+"]['name']}}</p>";
}
return {
restrict: 'E',
template : htmlcode
};
});
那很好用,但是当我将 userlength
替换为 $scope.users.length
时,应用程序失败了。
所以我的问题是如何从指令中的控制器访问 $scope?
- 您需要指定
link
函数
app.directive("appCustomer", function() {
function link(scope, element, attrs) {
var htmlcode = "";
for (var i = 0; i < scope.users.length; i++) {
element.text(Put your text here);
// OR
element.html(Put your HTML here);
}
}
return {
restrict: 'E',
users: '=',
link: link
};
});
在范围内您将收到 users array
- 第二个是您可以使用元素参数将数据放入模板。或者单独创建html模板
我做了一个打印对象的简单指令:
var app = angular.module("myApp", []);
app.controller('myCtrl', function($scope) {
$scope.users=[
{name:'davidi',age:'23'},
{name:'karen',age:'43'},
{name:'lior',age:'22'}
];
});
app.directive("appCustomer", function() {
var htmlcode="<p ng-repeat='user in customerInfo'>{{user.name}}</p>\
";
return {
restrict: 'E',
scope: {
customerInfo: '=info'
},
template : htmlcode
};
});
我的html代码:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body ng-app="myApp">
<div ng-controller="myCtrl">
<app-customer info="users"></app-customer>
</div>
</body>
</html>
<script src="angularapp.js"></script>
我只想在我的指令中访问 $scope.users 来打印没有 ng-repeat 的用户对象, 所以我这样做了:
var app = angular.module("myApp", []);
app.controller('myCtrl', function($scope) {
$scope.users=[
{name:'davidi',age:'23'},
{name:'karen',age:'43'},
{name:'lior',age:'22'}
];
});
app.directive("appCustomer", function() {
var htmlcode="";
var userslength=3;
for(var i=0;i<userslength;i++)
{
htmlcode=htmlcode+"<p>{{users["+i+"]['name']}}</p>";
}
return {
restrict: 'E',
template : htmlcode
};
});
那很好用,但是当我将 userlength
替换为 $scope.users.length
时,应用程序失败了。
所以我的问题是如何从指令中的控制器访问 $scope?
- 您需要指定
link
函数
app.directive("appCustomer", function() {
function link(scope, element, attrs) {
var htmlcode = "";
for (var i = 0; i < scope.users.length; i++) {
element.text(Put your text here);
// OR
element.html(Put your HTML here);
}
}
return {
restrict: 'E',
users: '=',
link: link
};
});
在范围内您将收到 users array
- 第二个是您可以使用元素参数将数据放入模板。或者单独创建html模板