隔离范围变量未定义 [英] Isolate scope variable is undefined

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本文介绍了隔离范围变量未定义的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

出于某种原因,我无法访问我的分离范围变量指数在我的链接功能。我曾经尝试都 @ = 来看看它的任何区别,这有没有影响,我也利用试过比指数以外的字(在情况下,它已经在由角或东西使用)配有相同的结果。错误信息:的ReferenceError:指数没有定义

指令:

  VAR jobernizeDirectives = angular.module('jobernizeDirectives',[]);jobernizeDirectives.directive('viewLargeContent',函数(){
    返回{
        范围: {
            指数:'=索引
        },
        要求:'ngModel',
        链接:功能(范围,EL,ATTRS,ngModel){            的console.log(指数);            功能openEditor(){
                的console.log(指数);                变种main_container = angular.element('。main_container');
                VAR view_frame = angular.element('视图帧。');                的console.log(ngModel);                main_container.append('< D​​IV CLASS =调光器>< / DIV>');
                main_container.append(                        '< D​​IV CLASS =大内容+指数+'>'
                    +'< TextArea>' + ngModel $ viewValue +'< / textarea的>'
                    +'<按钮和GT;提交更改< /按钮>'
                    +'< / DIV>'                );                变种二聚体= angular.element('调光器。');
                VAR content_container = angular.element(+指数大内容。');                // content_container.css({marginTop:(content_container.height()/ - 2),宽度:view_frame.width(),marginLeft:(view_frame.width()/ - 2)})
                content_container.css({高度:(0.8 * main_container.height()),宽:view_frame.width(),marginLeft:(view_frame.width()/ - 2)})                content_container.find('按钮')。在('点击',功能(){
                    VAR NEW_CONTENT = content_container.find('文本区域')得到(0).value的。                    ngModel $ setViewValue(NEW_CONTENT)。                    content_container.hide();
                    dimmer.hide();
                });
            }            // el.on('点击',openEditor);
            el.on('点击',openEditor);        }
    }
});

HTML

 < D​​IV数据-NG-控制器=resumesController>    < D​​IV CLASS =行>
        < D​​IV CLASS =小12列>
            < H2>您的简历和LT; / H>
        < / DIV>
    < / DIV>    < D​​IV CLASS =行>
        < D​​IV CLASS =小12列>
            <表>
                <&THEAD GT;
                    &所述; TR>
                        <第i个姓名和LT; /第i
                        <第i类和LT; /第i
                        <第i添加的日期< /第i
                        百分位>查看/编辑简历< /第i
                    < / TR>
                < / THEAD>
                <&TBODY GT;
                    < TR数据-NG-重复=简历简历>
                        &所述; TD> {{resume.name}}&下; / TD>
                        &所述; TD> {{resume.category}}&下; / TD>
                        &所述; TD> {{resume.date_added}}&下; / TD>
                        < TD><按钮指数=乐视图 - 大内容数据-NG-模式=resume.content>查看简历< /按钮>< / TD>
                    < / TR>
                < / TBODY>
            <表>
        < / DIV>
    < / DIV>< / DIV>


解决方案

指数是你的范围对象的属性,让你访问它是这样的:

  scope.index

这两个'@'或'='会的工作,不同的是,@将内插值,以及更新隔离的范围时,它的变化和'='是指角度应保持属性,同步分离范围。
如果这些变量有相同的名字,你可以使用语法糖

 范围:{
  指数:'@'
},

下面是一个 JSBin 与code。

For some reason I am not able to access my isolate scope variable "index" in my link function. I have tried both @ and = to see if it made any difference and this had no effect, I also tried using a word other than index (in case it was already in use by angular or something) with the same result. Error msg: ReferenceError: index is not defined.

directive:

var jobernizeDirectives = angular.module('jobernizeDirectives', []);

jobernizeDirectives.directive('viewLargeContent', function() {
    return {
        scope: {
            index: '=index' 
        },
        require: 'ngModel',
        link: function (scope, el, attrs, ngModel) {

            console.log(index);

            function openEditor() {
                console.log(index);

                var main_container = angular.element('.main_container');
                var view_frame = angular.element('.view-frame');

                console.log(ngModel);

                main_container.append('<div class="dimmer"></div>');
                main_container.append(

                        '<div class="large-content' + index + '">'
                    +   '<textarea>' + ngModel.$viewValue + '</textarea>' 
                    +   '<button>Submit Changes</button>'
                    +   '</div>'

                );  

                var dimmer = angular.element('.dimmer');
                var content_container = angular.element('.large-content' + index);      

                // content_container.css({ marginTop: (content_container.height()/-2), width: view_frame.width(), marginLeft: (view_frame.width()/-2) })
                content_container.css({ height: (0.8*main_container.height()), width: view_frame.width(), marginLeft: (view_frame.width()/-2)  })

                content_container.find('button').on('click', function() {
                    var new_content = content_container.find('textarea').get(0).value;

                    ngModel.$setViewValue(new_content);

                    content_container.hide();
                    dimmer.hide();
                });
            }

            // el.on('click', openEditor);
            el.on('click', openEditor);

        }
    }
});

html:

<div data-ng-controller="resumesController">

    <div class="row">
        <div class="small-12 columns">
            <h2>Your Resumes</h2>
        </div>
    </div>

    <div class="row">
        <div class="small-12 columns">
            <table>
                <thead>
                    <tr>
                        <th>Name</th>
                        <th>Category</th>
                        <th>Date Added</th>
                        <th>View/Edit Resume</th>
                    </tr>
                </thead>
                <tbody>
                    <tr data-ng-repeat="resume in resumes">
                        <td>{{ resume.name }}</td>
                        <td>{{ resume.category }}</td>
                        <td>{{ resume.date_added }}</td>
                        <td><button index="le" view-large-content data-ng-model="resume.content">View Resume</button></td>
                    </tr>
                </tbody>
            <table>
        </div>
    </div>

</div>

解决方案

Index is an attribute of you scope object, so you access it like this:

scope.index

Both '@' or '=' will work, the difference is that '@' will interpolate the value and update the isolated scope when it changes and '=' means Angular should keep the attribute and the isolated scope in sync. If the variables have the same name you can use the syntactic sugar

scope: {
  index: '@' 
},

Here is a JSBin with your code.

这篇关于隔离范围变量未定义的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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