Ionic - 切换按钮

有时，用户会提供两种选择。处理这种情况最有效的方法是通过切换表单。Ionic 为我们提供了切换元素的类，这些类具有动画效果且易于实现。

使用切换按钮

切换按钮可以使用两个 Ionic 类来实现。首先，我们需要创建一个标签，原因与上一章解释的一样，并为其分配一个toggle类。

在我们的标签内将创建。您会注意到在以下示例中使用了另外两个 Ionic 类。track类将为我们的复选框添加背景样式，并在点击切换按钮时添加颜色动画。handle类用于为其添加一个圆形按钮。

以下示例显示了两个切换表单。第一个被选中，第二个未被选中。

<label class = "toggle">
   <input type = "checkbox" />
   <div class = "track">
      <div class = "handle"></div>
   </div>
</label>

<br>

<label class = "toggle">
   <input type = "checkbox" />
   <div class = "track">
      <div class = "handle"></div>
   </div>
</label>

以上代码将生成以下屏幕 -

多个切换按钮

大多数时候，当您想在 Ionic 中添加多个相同类型的元素时，最好的方法是使用列表项。用于多个切换按钮的类是item-toggle。下一个示例演示了如何为切换按钮创建列表。第一个和第二个被选中。

<ul class = "list">
   <li class = "item item-toggle">
      Toggle 1
      <label class = "toggle">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle 2
      <label class = "toggle">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle 3
      <label class = "toggle">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle 4
      <label class = "toggle">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>
</ul>

以上代码将生成以下屏幕 -

切换按钮样式

所有 Ionic 颜色类都可以应用于切换按钮元素。前缀将是toggle。我们将将其应用于label元素。以下示例显示了应用的所有颜色。

<ul class = "list">
   <li class = "item item-toggle">
      Toggle Light
      <label class = "toggle  toggle-light">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Stable
      <label class = "toggle toggle-stable">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Positive
      <label class = "toggle toggle-positive">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Calm
      <label class = "toggle toggle-calm">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Balanced
      <label class = "toggle toggle-balanced">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Energized
      <label class = "toggle toggle-energized">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Assertive
      <label class = "toggle toggle-assertive">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Royal
      <label class = "toggle  toggle-royal">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>

   <li class = "item item-toggle">
      Toggle Dark
      <label class = "toggle toggle-dark">
         <input type = "checkbox" />
         <div class = "track">
            <div class = "handle"></div>
         </div>
      </label>
   </li>
</ul>

以上代码将生成以下屏幕 -