Angularjs:与儿童指令设置父指令范围值 [英] Angularjs: set parent directive scope value with child directive
问题描述
我不知道这是做到这一点的方式,但我的目标是:
- 我有一个父指令
- 在父母的指令的块,我有一个孩子的指令,将获得来自用户 某些输入
- 儿童指令将设置在父指令的范围值
- 我可以把它从那里
当然,问题是,父母与子女指令是兄弟姐妹。所以,我不知道如何做到这一点。注 - 我不想设置在数据
小提琴: http://jsfiddle.net/rrosen326/CZWS4/
HTML
< DIV NG控制器=parentController>
<家长DIR DIR-数据=显示此数据>
<儿童DIR>< /儿童DIR>
< /父目录>
< / DIV>
的JavaScript
VAR testapp = angular.module('testapp',[]);testapp.controller('parentController',['$范围,$窗口',函数($范围,$窗口){
的console.log('parentController范围ID ='$ $范围ID);
$ scope.ctrl_data =无关CTRL数据;
}]);testapp.directive('parentDir',函数厂(){
返回{
限制:ECA,
范围: {
ctrl_data:'@'
},
模板:'< DIV>< B> parentDir scope.dirData:LT; / B> {{dirData}}< DIV CLASS =误差1NG-transclude>< / DIV> < / DIV>,
更换:假的,
transclude:真实,
链接:功能(范围,元素,ATTRS){
scope.dirData = attrs.dirData;
的console.log(parent_dir范围:,范围的$ id);
}
};
});testapp.directive('childDir',函数厂(){
返回{
限制:ECA,
模板:'< H4>开始孩子指令和LT; / H4><输入类型=文本NG模型=dirData/>< / BR>< DIV>< B> childDir scope.dirData: < / b> {{dirData}}< / DIV>,
更换:假的,
transclude:假的,
链接:功能(范围,元素,ATTRS){
的console.log(child_dir范围:,范围的$ id);
scope.dirData =不,这数据! //默认文本
}
};
});
如果你想要的类型的通信,需要在指导孩子使用要求
。这将需要父控制器
所以你需要一个控制器
那里的功能你想要孩子的指令来使用。
例如:
app.directive(父,函数(){
返回{
限制:'E',
transclude:真实,
模板:'< DIV> {{}信息}<跨度NG-transclude>< / SPAN>< / DIV>,
控制器:函数($范围){
$ scope.message =原始父消息 this.setMessage =功能(消息){
$ scope.message =消息;
}
}
}
});
该控制器具有在 $范围
的消息,你必须改变它的方法。
$范围
和一个使用 这个
?您无法访问在子指令中的 $范围
,所以你需要使用这个
中的功能,所以你孩子的指令就能够调用它。
app.directive('孩子',函数($超时){
返回{
限制:'E',
要求:'^父母,
链接:功能(范围,ELEM,ATTRS,parentCtrl){
$超时(函数(){
parentCtrl.setMessage(我孩子!)
},3000)
}
}
})
正如所看到的,链路接收与parentCtrl第四参数(或者如果有多于一个的阵列)。在这里,我们只是等待3秒钟,直到我们叫我们在父控制器定义的方法来改变它的消息。
看到它住在这里:<一href=\"http://plnkr.co/edit/72PjQSOlckGyUQnH7zOA?p=$p$pview\">http://plnkr.co/edit/72PjQSOlckGyUQnH7zOA?p=$p$pview
I'm not sure this is the way to do this, but my goal is the following:
- I have a parent directive
- Inside the parent directive's block, I have a child directive that will get some input from the user
- The child directive will set a value in the parent directive's scope
- I can take it from there
Of course the problem is that the parent and child directives are siblings. So I don't know how to do this. Note - I do not want to set data in the
Fiddle: http://jsfiddle.net/rrosen326/CZWS4/
html:
<div ng-controller="parentController">
<parent-dir dir-data="display this data">
<child-dir></child-dir>
</parent-dir>
</div>
Javascript
var testapp = angular.module('testapp', []);
testapp.controller('parentController', ['$scope', '$window', function ($scope, $window) {
console.log('parentController scope id = ', $scope.$id);
$scope.ctrl_data = "irrelevant ctrl data";
}]);
testapp.directive('parentDir', function factory() {
return {
restrict: 'ECA',
scope: {
ctrl_data: '@'
},
template: '<div><b>parentDir scope.dirData:</b> {{dirData}} <div class="offset1" ng-transclude></div> </div>',
replace: false,
transclude: true,
link: function (scope, element, attrs) {
scope.dirData = attrs.dirData;
console.log("parent_dir scope: ", scope.$id);
}
};
});
testapp.directive('childDir', function factory() {
return {
restrict: 'ECA',
template: '<h4>Begin child directive</h4><input type="text" ng-model="dirData" /></br><div><b>childDir scope.dirData:</b> {{dirData}}</div>',
replace: false,
transclude: false,
link: function (scope, element, attrs) {
console.log("child_dir scope: ", scope.$id);
scope.dirData = "No, THIS data!"; // default text
}
};
});
If you want that kind of communication, you need to use require
in the child directive. That will require the parent controller
so you need a controller
there with the functionality you want the children directives to use.
For example:
app.directive('parent', function() {
return {
restrict: 'E',
transclude: true,
template: '<div>{{message}}<span ng-transclude></span></div>',
controller: function($scope) {
$scope.message = "Original parent message"
this.setMessage = function(message) {
$scope.message = message;
}
}
}
});
The controller has a message in the $scope
and you have a method to change it.
Why one in $scope
and one using this
? You can't access the $scope
in the child directive, so you need to use this
in the function so your child directive will be able to call it.
app.directive('child', function($timeout) {
return {
restrict: 'E',
require: '^parent',
link: function(scope, elem, attrs, parentCtrl) {
$timeout(function() {
parentCtrl.setMessage('I am the child!')
}, 3000)
}
}
})
As you see, the link receives a fourth param with the parentCtrl (or if there is more than one, an array). Here we just wait 3 seconds until we call that method we defined in the parent controller to change its message.
See it live here: http://plnkr.co/edit/72PjQSOlckGyUQnH7zOA?p=preview
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