2、按钮：Buttons

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<ion-content padding class="page1">
 
  <h1>基本用法，实体框</h1>
  <button>默认</button>
  <button light>Light</button>
  <button secondary>Secondary</button>
  <button danger>Danger</button>
  <button dark>Dark</button>
  <br />
 
  <h1>Outline Style：实线框</h1>
  <button outline>Primary Outline</button>
  <button light outline>Light Outline</button>
  <button secondary outline>Secondary Outline</button>
  <button danger outline>Danger Outline</button>
  <button dark outline>Dark Outline</button>
  <br />
 
  <h1>Clear Style：消除边框</h1>
  <button clear>Primary Clear</button>
  <button light clear>Light Clear</button>
  <button secondary clear>Secondary Clear</button>
  <button danger clear>Danger Clear</button>
  <button dark clear>Dark Clear</button>
  <br />
 
  <h1>Round：椭圆框</h1>
  <button light round>Light Round</button>
  <button round>Primary Round</button>
  <button secondary round>Secondary Round</button>
  <button danger round>Danger Round</button>
  <button dark round>Dark Round</button>
   
</ion-content>
 
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<ion-content padding class="page1">
 
  <h4>在按钮上添加block会使按钮取其父的宽度的100%。</h4>
  <button block>Block Button</button>
  <br />
 
  <h4>添加 full 按钮也将使按钮取其父的宽度为100%。但是，它也将删除按钮的左，右边框。当按钮应该在显示的整个宽度范围时，该样式是有用的</h4>
  <button full>Full Button</button>
  <br />
 
  <button small>最小</button>
  <button>默认</button>
  <button large>最大</button>
  <br />
 
  <button fab>圆形</button>
 
</ion-content>
 
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<ion-content padding class="page1">
   
  <!-- Float the icon left -->
  <button>
    <ion-icon name="home"></ion-icon>
    Left Icon
  </button>
 
  <!-- Float the icon right -->
  <button>
    Right Icon
    <ion-icon name="home"></ion-icon>
  </button>
 
  <!-- Only icon (no text) -->
  <button>
    <ion-icon name="home"></ion-icon>
  </button>
 
</ion-content>
 
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<ion-navbar>
  <ion-buttons start>
    <button>
      <ion-icon name="contact"></ion-icon>
    </button>
  </ion-buttons>
 
  <ion-buttons end>
    <button>
      <ion-icon name="search"></ion-icon>
    </button>
  </ion-buttons>
</ion-navbar>
 
<ion-list>
 
  <ion-item>
    Left Icon Button
    <button outline item-right>
      <ion-icon name="star"></ion-icon>
      Left Icon
    </button>
 
  </ion-item>
</ion-list>
 
<h4>虽然按钮可以自己使用，他们可以很容易地在其他组件中使用。例如，按钮可以添加到列表项或导航栏。</h4>
 
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