指令不在模板字符串中进行插值

Question

我正试图有条件地建立一个模板.我得到了一个带有一些div和spans的k2plugin指令.根据pluginui属性,我想在模板的末尾插入另一个指令.我的代码,接下来,插入除pluginui之外的所有内容例如,最后一个div导致:

<div {{pluginui}} width='300' height='420'></div>

{{pluginui}}是文字的,而它应该插值以触发另一个指令.有趣的是,如果我将{{pluginui}}放在同一行的其他位置(例如,在标签之间,它会进行插值.

我错了什么？

app.directive("k2plugin", function () {
            return {
                restrict: "A",
                scope: true,
                link: function (scope, elements, attrs) {
                    console.log ("creating plugin");

                    // this won't work immediatley. attribute pluginname will be undefined as soon as this is called.
                    scope.pluginname = "Loading...";
                    scope.pluginid = null;

                    // observe changes to interpolated attributes

                            // [...] observe name, id, width, height

                    attrs.$observe('pluginui', function(value) {
                        console.log('pluginui has changed value to ' + value);
                        scope.pluginui = attrs.pluginui + "viewport";
                    });

                },
                template: "<div>\
                           <div>\
                           <span>{{pluginname}}</span>\
                           <span ng-click=\"resize(pluginid)\">_</span> <span ng-click=\"remove(pluginid)\">X</span>\
                           </div>\
                           <div {{pluginui}} width='{{pluginwidth}}' height='{{pluginheight}}'></div>\
                           </div>",
                replace: true,
            };
        });

        app.directive("canvasviewport", function () {
            return {
                restrict: "A",
                scope: true,
                link: function (scope, elements, attrs) {
                    console.log ("creating canvas viewport");
                },
                template: "<canvas width='{{pluginwidth}}' height='{{pluginheight}}'></canvas>",
                replace: true
            };
        });

        app.directive("divviewport", function () {
            return {
                restrict: "A",
                scope: true,
                link: function (scope, elements, attrs) {
                    console.log ("creating div viewport");
                },
                template: "<div style=\"width='{{pluginwidth}}' height='{{pluginheight}}'\"></div>",
                replace: true
            };
        });

        app.directive("autoviewport", function () {
            return {
                restrict: "A",
                scope: true,
                link: function (scope, elements, attrs) {
                    console.log ("creating auto viewport");
                },
                template: "<canvas width='{{pluginwidth}}' height='{{pluginheight}}'></canvas>",
                replace: true
            };
        });

Answer 1

我认为Angular不会将某些内容插入到指令名称中.{{}} s(自动)设置$ watch.当$ watch注意到更改时,它会更新视图,但它不会调用$ compile,这是我认为需要在这里发生的.

所以,我会尝试在指令的链接函数中生成HTML /模板然后$编译它.就像是:

scope.$watch('pluginui', function(newValue) {
   var jqLiteWrappedElement = angular.element('<div ' + newValue + ' width=...');
   element.replaceWith(jqLiteWrappedElement);
   $compile(jqLiteWrappedElement)(scope);
})

记得注入$compile指令.