通过遮罩层,可以强调部分内容。
基本使用 
显示遮罩层
html
<iui-mask v-model="visible"></iui-mask>
<script setup>
  import { ref } from "vue";
  const visible = ref(false);
  const onClick = () => {
    visible.value = true;
  };
</script><iui-mask v-model="visible"></iui-mask>
<script setup>
  import { ref } from "vue";
  const visible = ref(false);
  const onClick = () => {
    visible.value = true;
  };
</script>函数调用 
通过 ref 调用遮罩层的方法
html
<iui-mask ref="mask">
  <view :style="{ width: '200px', height: '160px' }">
    <iui-image src="example.png"></iui-image>
  </view>
</iui-mask>
<script setup>
  import { ref } from "vue";
  const mask = ref(null);
  onMounted(() => {
    mask.value.show();
  });
</script><iui-mask ref="mask">
  <view :style="{ width: '200px', height: '160px' }">
    <iui-image src="example.png"></iui-image>
  </view>
</iui-mask>
<script setup>
  import { ref } from "vue";
  const mask = ref(null);
  onMounted(() => {
    mask.value.show();
  });
</script>API 
<Mask>props<Mask>methods
