[英]AngularJS directive - passing function as argument to “&” attribute
我非常深刻地了解angular directive
,并且我正在尝试做一些非常简单的事情,我认为它不受角度的支持。
我正在尝试将函数作为参数传递给指令隔离范围(类型&
)。
我只想将“ @
”范围值传递给我的控制器中实现的函数。
看起来用参数调用“ &
”scope属性似乎是不可能的。
<div ng-app="MyApp">
<div ng-controller="MyController">
<testkeyvalue accept="blabla" key='keyA' value='valueA' />
</div>
</div>
var myApp = angular.module('MyApp', [])
myApp.directive('testkeyvalue', function ()
{
return {
restrict: 'E',
replace: true,
scope: {
key: '@',
value: '@',
accept: "&"
},
template: '<div><label class="control-label">{{key}}</label><br/>' +
'<label class="control-label">{{value}}</label>' ,
link: function (scope, element, attrs)
{
var arr = ["key", "value", "accept"];
for (var i = 0, cnt = arr.length; i < arr.length; i++)
{
scope.$watch(arr[i], function ()
{
cnt--;
if (cnt <= 0)
{
fireaccept()
}
});
}
var fireaccept = function ()
{
//This is the problem
//I can't deliver this arguments to the "blabla" function im my controller
scope.accept(scope.key, scope.value);
}
}
};
});
myApp.controller('MyController', function ($scope, $window)
{
$scope.blabla = function (key, val)
{
$window.alert("key:" + key + " val: " + val);
};
});
以下是完整的演示: http : //jsfiddle.net/chezih/y85Ft/401/
我已经读过这个问题: AngularJS:如何将参数/函数传递给指令?
但它不是我想要的,我只想注册控制器,从指令内部触发的事件(事件可以传递参数)。
有办法做到这一点吗?
这是这样的:
http://jsfiddle.net/Pascalz/hr8zua7q/
<div ng-app="MyApp">
<div ng-controller="MyController">
<testkeyvalue accept="blabla(key, val)" key='keyA' value='valueA' />
</div>
</div>
var myApp = angular.module('MyApp', [])
myApp.directive('testkeyvalue', function ()
{
return {
restrict: 'E',
replace: true,
scope: {
key: '@',
value: '@',
accept: "&"
},
template: '<div><label class="control-label">{{key}}</label><br/>' +
'<label class="control-label">{{value}}</label>' ,
link: function (scope, element, attrs)
{
var arr = ["key", "value", "accept"];
for (var i = 0, cnt = arr.length; i < arr.length; i++)
{
scope.$watch(arr[i], function ()
{
cnt--;
if (cnt <= 0)
{
fireaccept()
}
});
}
var fireaccept = function ()
{
//This is the problem
//I can't deliver this arguments to the "blabla" function im my controller
scope.accept({key:scope.key, val:scope.value});
}
}
};
});
myApp.controller('MyController', function ($scope, $window)
{
$scope.blabla = function (key, val)
{
$window.alert("key:" + key + " val: " + val);
};
});
正如Jussi Kosunen在评论中所说,您可以使用“=”运算符而不是“&”来访问函数作为隔离范围中的变量。
最小指令可能如下所示:
directive('exDir', function () {
return {
scope: {isolateScopeFunction: "=fun"},
template: '<button ng-click="isolateScopeFunction(\'inside isolateScope\')">press</button>'
};
});
你会像这样使用它:
<div ex-dir fun="outerScopeFunctionName"></div>
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