我正在尝试创建一个指令,它将使用与创建该指令的元素相同的ng-model来创建一个输入字段。
这是我到目前为止想出来的:
HTML
<!doctype html>
<html ng-app="plunker" >
<head>
<meta charset="utf-8">
<title>AngularJS Plunker</title>
<link rel="stylesheet" href="style.css">
<script>document.write("<base href=\"" + document.location + "\" />");</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.2/angular.js"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
This scope value <input ng-model="name">
<my-directive ng-model="name"></my-directive>
</body>
</html>
JavaScript
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
$scope.name = "Felipe";
});
app.directive('myDirective', function($compile) {
return {
restrict: 'E',
scope: {
ngModel: '='
},
template: '<div class="some"><label for="{{id}}">{{label}}</label>' +
'<input id="{{id}}" ng-model="value"></div>',
replace: true,
require: 'ngModel',
link: function($scope, elem, attr, ctrl) {
$scope.label = attr.ngModel;
$scope.id = attr.ngModel;
console.debug(attr.ngModel);
console.debug($scope.$parent.$eval(attr.ngModel));
var textField = $('input', elem).
attr('ng-model', attr.ngModel).
val($scope.$parent.$eval(attr.ngModel));
$compile(textField)($scope.$parent);
}
};
});
但是,我不确定这是否是处理这种情况的正确方法,并且存在一个错误,即我的控件没有使用ng-model目标字段的值进行初始化。
下面是上面代码的一部分:http://plnkr.co/edit/IvrDbJ
处理这个问题的正确方法是什么?
编辑:从模板中删除ng-model="value"
之后,似乎工作得很好。但是,我将保留这个问题,因为我想仔细检查这是不是正确的方法。
发布于 2013-01-02 11:18:15
:这个答案是旧的,可能已经过时了。只是提醒一下,这样就不会误入歧途。我不再使用Angular,所以我不是一个很好的改进位置。
这实际上是一个很好的逻辑,但是你可以把事情简化一点。
指令
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
$scope.model = { name: 'World' };
$scope.name = "Felipe";
});
app.directive('myDirective', function($compile) {
return {
restrict: 'AE', //attribute or element
scope: {
myDirectiveVar: '=',
//bindAttr: '='
},
template: '<div class="some">' +
'<input ng-model="myDirectiveVar"></div>',
replace: true,
//require: 'ngModel',
link: function($scope, elem, attr, ctrl) {
console.debug($scope);
//var textField = $('input', elem).attr('ng-model', 'myDirectiveVar');
// $compile(textField)($scope.$parent);
}
};
});
带有指令的Html
<body ng-controller="MainCtrl">
This scope value <input ng-model="name">
<my-directive my-directive-var="name"></my-directive>
</body>
CSS
.some {
border: 1px solid #cacaca;
padding: 10px;
}
您可以使用此Plunker查看它的实际效果。
这是我所看到的:
编辑模型正如马克在他的评论中提到的,你没有理由不能使用ng-,只是为了遵守约定。
通过在你的指令中显式地创建一个作用域(一个‘’作用域),该指令的作用域不能访问父作用域上的‘
)。
通常,如果希望指令中的值始终映射到父范围中的值,则指令应使用隔离作用域(您这样做是正确的),并使用'=‘类型作用域。
发布于 2013-06-03 23:00:39
我综合了所有答案,现在有两种使用ng-model属性的方法:
具有新作用域的
上执行编译的作用域相同
var app = angular.module('model', []);
app.controller('MainCtrl', function($scope) {
$scope.name = "Felipe";
$scope.label = "The Label";
});
app.directive('myDirectiveWithScope', function() {
return {
restrict: 'E',
scope: {
ngModel: '=',
},
// Notice how label isn't copied
template: '<div class="some"><label>{{label}}: <input ng-model="ngModel"></label></div>',
replace: true
};
});
app.directive('myDirectiveWithChildScope', function($compile) {
return {
restrict: 'E',
scope: true,
// Notice how label is visible in the scope
template: '<div class="some"><label>{{label}}: <input></label></div>',
replace: true,
link: function ($scope, element) {
// element will be the div which gets the ng-model on the original directive
var model = element.attr('ng-model');
$('input',element).attr('ng-model', model);
return $compile(element)($scope);
}
};
});
app.directive('myDirectiveWithoutScope', function($compile) {
return {
restrict: 'E',
template: '<div class="some"><label>{{$parent.label}}: <input></label></div>',
replace: true,
link: function ($scope, element) {
// element will be the div which gets the ng-model on the original directive
var model = element.attr('ng-model');
return $compile($('input',element).attr('ng-model', model))($scope);
}
};
});
app.directive('myReplacedDirectiveIsolate', function($compile) {
return {
restrict: 'E',
scope: {},
template: '<input class="some">',
replace: true
};
});
app.directive('myReplacedDirectiveChild', function($compile) {
return {
restrict: 'E',
scope: true,
template: '<input class="some">',
replace: true
};
});
app.directive('myReplacedDirective', function($compile) {
return {
restrict: 'E',
template: '<input class="some">',
replace: true
};
});
.some {
border: 1px solid #cacaca;
padding: 10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0/angular.min.js"></script>
<div ng-app="model" ng-controller="MainCtrl">
This scope value <input ng-model="name">, label: "{{label}}"
<ul>
<li>With new isolate scope (label from parent):
<my-directive-with-scope ng-model="name"></my-directive-with-scope>
</li>
<li>With new child scope:
<my-directive-with-child-scope ng-model="name"></my-directive-with-child-scope>
</li>
<li>Same scope:
<my-directive-without-scope ng-model="name"></my-directive-without-scope>
</li>
<li>Replaced element, isolate scope:
<my-replaced-directive-isolate ng-model="name"></my-replaced-directive-isolate>
</li>
<li>Replaced element, child scope:
<my-replaced-directive-child ng-model="name"></my-replaced-directive-child>
</li>
<li>Replaced element, same scope:
<my-replaced-directive ng-model="name"></my-replaced-directive>
</li>
</ul>
<p>Try typing in the child scope ones, they copy the value into the child scope which breaks the link with the parent scope.
<p>Also notice how removing jQuery makes it so only the new-isolate-scope version works.
<p>Finally, note that the replace+isolate scope only works in AngularJS >=1.2.0
</div>
我不确定我是否喜欢在链接时编译。但是,如果只是用另一个元素替换元素,就不需要这样做。
总而言之,我更喜欢第一个。只需将scope设置为{ngModel:"="}
,并在模板中将ng-model="ngModel"
设置为您想要的位置。
更新:我内联了代码片段,并将其更新为Angular v1.2。事实证明,隔离作用域仍然是最好的,特别是在不使用jQuery时。因此,它可以归结为:
replace(‘myReplacedDirective’,function($compile) { return { restrict:'E',template:'',replace: true };replace使用:
app.directive('myDirectiveWithScope',function() { return { restrict:'E',scope:{ ngModel:'=',},template:'‘};});
发布于 2014-03-25 13:40:41
这并不复杂:在你的指令中,使用一个别名:scope:{alias:'=ngModel'}
.directive('dateselect', function () {
return {
restrict: 'E',
transclude: true,
scope:{
bindModel:'=ngModel'
},
template:'<input ng-model="bindModel"/>'
}
在html中,像往常一样使用
<dateselect ng-model="birthday"></dateselect>
https://stackoverflow.com/questions/14115701
复制相似问题