add Switch UI

add Switch UI

styles/components/index.less

@@ -10,4 +10,5 @@
 @import "message";
 @import "notice";
 @import "radio";
-@import "checkbox";
+@import "checkbox";
+@import "switch";

styles/components/switch.less

@@ -0,0 +1,104 @@
+@switch-prefix-cls: ~"@{css-prefix}switch";
+
+.@{switch-prefix-cls} {
+    display: inline-block;
+    width: 44px;
+    height: 24px;
+    line-height: 22px;
+    border-radius: 22px;
+    vertical-align: middle;
+    border: 1px solid #ccc;
+    background-color: #ccc;
+    position: relative;
+    cursor: pointer;
+    user-select: none;
+    .transition(all @transition-time @ease-in-out);
+
+    &-inner {
+        color: #fff;
+        font-size: 12px;
+        position: absolute;
+        left: 24px;
+    }
+
+    &:after {
+        content: '';
+        width: 22px;
+        height: 22px;
+        border-radius: 50%;
+        background-color: #fff;
+        position: absolute;
+        left: 0;
+        top: 0;
+        cursor: pointer;
+        .transition2(left @transition-time @ease-in-out, width @transition-time @ease-in-out);
+    }
+
+    &:active:after {
+        width: 26px;
+    }
+
+    &:focus {
+        box-shadow: 0 0 0 2px fade(@primary-color, 20%);
+        outline: 0;
+    }
+
+    &:focus:hover {
+        box-shadow: none;
+    }
+
+    &-small {
+        height: 14px;
+        line-height: 12px;
+        width: 28px;
+        &:after {
+            width: 12px;
+            height: 12px;
+            top: 0;
+            left: 0;
+        }
+        &:active:after {
+            width: 16px;
+        }
+    }
+
+    &-small&-checked:after {
+        left: 14px;
+    }
+
+    &-small:active&-checked:after {
+        left: 10px;
+    }
+
+    &-checked {
+        border-color: @primary-color;
+        background-color: @primary-color;
+
+        .@{switch-prefix-cls}-inner {
+            left: 6px;
+        }
+
+        &:after {
+            left: 20px;
+        }
+
+        &:active:after {
+            left: 16px;
+        }
+    }
+
+    &-disabled {
+        cursor: @cursor-disabled;
+        background: #f3f3f3;
+        border-color: #f3f3f3;
+
+        &:after {
+            background: #ccc;
+            cursor: not-allowed;
+        }
+
+        .@{switch-prefix-cls}-inner {
+            color: #ccc;
+        }
+    }
+}

styles/mixins/checkbox.less

@@ -84,7 +84,7 @@
                 border-top: 0;
                 border-left: 0;
                 .transform(rotate(45deg) scale(1));
-                .transition(all @transition-time @ease-in-out .1s);
+                .transition(all @transition-time @ease-in-out);
             }
         }
     }
@@ -145,8 +145,8 @@
 
     .@{checkbox-prefix-cls}-wrapper + span,
     .@{checkbox-prefix-cls} + span {
-        margin-left: 8px;
-        margin-right: 8px;
+        margin-left: 4px;
+        margin-right: 4px;
     }
 
     .@{checkbox-prefix-cls}-group {