SOURCE

new Vue({
  el: "#app",
  data: {
		options: {
			formItem: [
        {
          type: 'input',
          props: {
          	placeholder: '8列'
        	},
          span: 8
        },
        {
          type: 'input',
          props: {
          	placeholder: '8列'
        	},
          span: 8
        },
        {
          type: 'input',
          props: {
          	placeholder: '8列'
        	},
          span: 8
        },
        {
          type: 'input',
          props: {
          	placeholder: '占满整行'
        	},
        },
        {
          type: 'input',
          props: {
          	placeholder: '占一半'
        	},
        	span: 12
        },
        {
          type: 'input',
          props: {
          	placeholder: '占一半'
        	},
        	span: 12
        },
        {
          type: 'input',
          props: {
          	placeholder: '7列'
        	},
          span: 7
        },
        {
          type: 'input',
          props: {
          	placeholder: '7列,左侧间距为1列'
        	},
          span: 7,
        	offset: 1
        },
        {
          type: 'input',
          props: {
          	placeholder: '7列,左侧间距为2列'
        	},
          span: 7,
        	offset: 2
        },
      ]
    }
  }
})

<link rel="stylesheet" href="//unpkg.com/view-design/dist/styles/iview.css">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.min.js"></script>
<script src="//unpkg.com/view-design/dist/iview.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue-form-maker/dist/vue-form-maker.js"></script>
<div id="app">
  <vue-form-maker :options="options" />
</div>

#app {
  padding: 10px 20px;
}