Question

我目前正在学习流星会话

当用户点击All将返回如下：

<div class="ui secondary pointing menu">
  <a id="all" class="item active">All</a>
  <a id="fiction" class="item">Fiction</a>
  <a id="nonfiction" class="item">Non Fiction</a>
</div>

当用户点击Fiction时会返回如下：

<div class="ui secondary pointing menu">
  <a id="all" class="item">All</a>
  <a id="fiction" class="item active">Fiction</a>
  <a id="nonfiction" class="item">Non Fiction</a>
</div>

当用户点击非小说将返回如下：

<div class="ui secondary pointing menu">
  <a id="all" class="item">All</a>
  <a id="fiction" class="item">Fiction</a>
  <a id="nonfiction" class="item active">Non Fiction</a>
</div>

这是我的模板：

<template name="bookList">
  <div class="ui secondary pointing menu">
    <a id="all" class="item{{selectedTab}}">All</a>
    <a id="fiction" class="item{{selectedTab}}">Fiction</a>
    <a id="nonfiction" class="item{{selectedTab}}">Non Fiction</a>
  </div>
</template>

这是我的助手：

Session.set('tabAll', ' active');
Session.set('tabFiction', '');
Session.set('tabNonFiction', '');

Template.bookList.helpers({
  selectedTab: function() {
    Session.get("tabAll");
    Session.get("tabFiction");
    Session.get("tabNonFiction");
  }
});

Template.bookList.events({
  'click #all': function () {
    Session.set('tabAll', ' active');
    Session.set('tabFiction', '');
    Session.set('tabNonFiction', '');
  },
  'click #fiction': function () {
    Session.set('tabAll', '');
    Session.set('tabFiction', ' active');
    Session.set('tabNonFiction', '');
  },
  'click #nonfiction': function () {
    Session.set('tabAll', '');
    Session.set('tabFiction', '');
    Session.set('tabNonFiction', ' active');
  },
});

但它没有用。如果有人纠正我的错误会很高兴

谢谢..

Answer 1

我看到很多错误，所以这里有一个简单的工作示例，你可以看到你犯错的地方

模板调用辅助函数并为其赋予参数，在这种情况下，我们要检查的选项卡是否处于活动状态。

<template name="bookList">
  <div class="ui secondary pointing menu">
    <a id="all" class="item {{selectedTab "all"}}">All</a>
    <a id="fiction" class="item {{selectedTab "fiction"}}">Fiction</a>
    <a id="nonfiction" class="item {{selectedTab "nonfiction"}}">Non Fiction</a>
  </div>
</template>

帮助者将检查会话值是否等于您要检查的选项卡是否会返回“活动”

Template.bookList.helpers({
  selectedTab: function(tab) {
    var activeTab = Session.get('activeTab');
    if (activeTab === tab) {
      return 'active';
    }
  }
});

事件只是更改会话值，它将在模板中重新激活

Template.chapterList.events({
  'click #all': function () {
    Session.set('activeTab', 'all');
  },
  'click #fiction': function () {
   Session.set('activeTab', 'fiction');
  },
  'click #nonfiction': function () {
   Session.set('activeTab', 'nonfiction');
  },
});

这是一个演示应用示例：http://meteorpad.com/pad/tAsjEJd34YRCfFbeB/BooksList

METEOR：如何通过会话操纵课程？

1 个答案: