Angularjs：如何将函数传递给编译

Question

我有以下指令：

app.directive('pagedownAdmin', ['$compile', '$timeout', function ($compile, $timeout) {
    var nextId = 0;
    var converter = Markdown.getSanitizingConverter();
    converter.hooks.chain("preBlockGamut", function (text, rbg) {
        return text.replace(/^ {0,3}""" *\n((?:.*?\n)+?) {0,3}""" *$/gm, function (whole, inner) {
            return "<blockquote>" + rbg(inner) + "</blockquote>\n";
        });
    });

    return {
        restrict: "E",
        scope: {
            content: "=",
            modal: '=modal'
        },
        template: '<div class="pagedown-bootstrap-editor"></div>',
        link: function (scope, iElement, attrs) {

            var editorUniqueId;

            if (attrs.id == null) {
                editorUniqueId = nextId++;
            } else {
                editorUniqueId = attrs.id;
            }

            scope.hideDiv = function () {
                document.getElementById("wmd-button-bar-" + editorUniqueId).style.display = 'none';
            };

            scope.showDiv = function () {
                document.getElementById("wmd-button-bar-" + editorUniqueId).style.display = 'block';
            };

            scope;

            var newElement = $compile(
                '<div>' +
                    '<div class="wmd-panel">' +
                        '<div data-ng-hide="modal.wmdPreview == true" id="wmd-button-bar-' + editorUniqueId + '" style="display:none;"></div>' +
                            '<textarea on-focus="showDiv()" on-blur="hideDiv()" data-ng-hide="modal.wmdPreview == true" class="wmd-input" id="wmd-input-' + editorUniqueId + '" ng-model="content" >' +
                            '</textarea>' +
                        '</div>' +
                    '<div data-ng-show="modal.wmdPreview == true" id="wmd-preview-' + editorUniqueId + '" class="pagedownPreview wmd-panel wmd-preview">test div</div>' +
                '</div>')(scope)
            ;

            iElement.append(newElement);

            var help = angular.isFunction(scope.help) ? scope.help : function () {
                // redirect to the guide by default
                $window.open("http://daringfireball.net/projects/markdown/syntax", "_blank");
            };

            var editor = new Markdown.Editor(converter, "-" + editorUniqueId, {
                handler: help
            });

            var editorElement = angular.element(document.getElementById("wmd-input-" + editorUniqueId));

            editor.hooks.chain("onPreviewRefresh", function () {
                // wire up changes caused by user interaction with the pagedown controls
                // and do within $apply
                $timeout(function () {
                    scope.content = editorElement.val();
                });
            });

            editor.run();
        }
    }
}]);

在里面我有 showDiv 和 hideDiv 函数，当我点击进入和退出文本区域时，它们会显示和隐藏页面编辑器的菜单。

我将函数传递给编译内的事件：

//First try
<textarea onfocus="showDiv()" onblur="hideDiv()"></textarea>

当我在文本区域的内部和外部单击时，出现错误：

Uncaught ReferenceError: on is not defined
Uncaught ReferenceError: off is not defined

//Second try
<textarea on-focus="showDiv()" on-blur="hideDiv()"></textarea>

当我点击进入和退出 textarea 时，什么也没有发生。没有错误但也没有调用函数。

谁能指出我正确的方向？谢谢

Answer 1

不要使用相同的作用域，而是实例化一个新作用域 (scope.$new()) 并将函数分配给这个新作用域。因为否则您将覆盖范围声明分配给范围对象的函数引用。

var newScope = scope.$new();
newScope.hideDiv = function() {...};
newScope.showDiv = function() {...};
...
var newElement = $compile(...)(newScope);

并且要使用赋予原始作用域（指令的）的函数引用，您可以在新作用域函数中调用这些函数引用（例如function() { scope.hideDiv(); }）。

工作 plnkr：

http://plnkr.co/edit/nGux3DOsrcPBcmz43p2A?p=preview

https://docs.angularjs.org/api/ng/service/$compile https://code.angularjs.org/1.3.16/docs/api/ng/type/$rootScope.Scope#$new

Answer 2

感谢你们试图提供帮助。我发现我的代码有什么问题。我犯了一个非常愚蠢/菜鸟的错误。我用on-focus 代替ng-focus 和on-blur 代替ng-blur。