我决定在我当前的项目中使用message service angular package。在其指令中有一个var = templateString
我想编辑到我选择的模板。
我想知道如何编辑此字符串而不会弄乱原始代码。我阅读了一系列相似的答案,但我发现它可以创建一个完全覆盖它的指令。我只想编辑模板字符串并保留现有代码。
我正在使用Angular 1.3.15
指令
MessageCenterModule.
directive('mcMessages', ['$rootScope', 'messageCenterService', function ($rootScope, messageCenterService) {
/*jshint multistr: true */
var templateString = '\
<div id="mc-messages-wrapper">\
<div class="alert alert-{{ message.type }} {{ animation }}" ng-repeat="message in mcMessages">\
<a class="close" ng-click="message.close();" data-dismiss="alert" aria-hidden="true">×</a>\
<span ng-switch on="message.html">\
<span ng-switch-when="true">\
<span ng-bind-html="message.message"></span>\
</span>\
<span ng-switch-default>\
{{ message.message }}\
</span>\
</div>\
</div>\
';
return {
restrict: 'EA',
template: templateString,
link: function(scope, element, attrs) {
// Bind the messages from the service to the root scope.
messageCenterService.flush();
var changeReaction = function (event, to, from) {
// Update 'unseen' messages to be marked as 'shown'.
messageCenterService.markShown();
// Remove the messages that have been shown.
messageCenterService.removeShown();
$rootScope.mcMessages = messageCenterService.mcMessages;
messageCenterService.flush();
};
if (messageCenterService.offlistener === undefined) {
messageCenterService.offlistener = $rootScope.$on('$locationChangeSuccess', changeReaction);
}
scope.animation = attrs.animation || 'fade in';
}
};
}]);
有可能吗?什么是最好的方式?
答案 0 :(得分:2)
我非常抱歉朋友,你将不得不重写它。
YOINK!你要装饰它。听起来有点豪华,但是,嘿。它有效。
每当您使用$provide#decorator时,您都会将原始实例作为名为$delegate
的本地可注入实体。
因此,您可以保留您想要的内容,并丢弃您不想要的内容。
你要做的第一件事是找出 原始实现如何利用你想要修改的东西,以免破坏整个事情。
幸运的是,您要修改的templateString仅用作directive.template
,因此它应该是一个相当简单的装饰。
它会是这样的:
app.config(function ($provide) {
/**
* note the use of 'directivename' + 'Directive'.
* Whenever you decorate a directive, you have to apply the 'Directive' suffix due to this:
* https://github.com/angular/angular.js/blob/master/src/ng/compile.js#L727
*/
$provide.decorator('mcMessagesDirective', function ($delegate) {
/**
* We're getting the item at the first index here,
* because the $delegate of a directive isn't quite an 'instance' -
* it's a collection of DDO's (directive definition objects) that
* go by the same name.
*
* Yes, the $compileProvider allows multiple directives with the same name.
* We're interested in the first one in this case.
*/
var dir = $delegate[0];
/**
* Modify the template of the directive.
* You can either hardcode this, or:
* - Decorate the directive so as to pass the template in.
* - Fetch a template with $http.
* - Inject a string from a service, constant, provider, you name it.
*/
dir.template = 'your_own_custom_templateString';
/**
* Return the full collection of directives (or rather, 'the $delegate').
*/
return $delegate;
});
});
然后你去了,每当你再次使用mcMessages
时,它就会使用你刚给它的硬编码模板。
Moar链接!
答案 1 :(得分:1)
您可以使用AngularJS装饰器修改指令,如下所示:
MessageCenterModule
.config(function ($provide) {
$provide.decorator('mcMessagesDirective', function ($delegate) {
var directive = $delegate[0];
//assign a new value to the template
directive.template = 'My template';
return $delegate;
});
});