<field name="newsimage">
        <argument name="data" xsi:type="array">
            <item name="config" xsi:type="array">
                <item name="dataType" xsi:type="string">image</item>
                <item name="source" xsi:type="string">news</item>
                <item name="label" xsi:type="string" translate="true">Category Image</item>
                <item name="visible" xsi:type="boolean">true</item>
                <item name="formElement" xsi:type="string">fileUploader</item>
               <!-- <item name="elementTmpl" xsi:type="string">ui/form/element/uploader/uploader</item> -->
               <!-- <item name="previewTmpl" xsi:type="string">Magento_Catalog/image-preview</item> -->
                <item name="required" xsi:type="boolean">false</item>
                <item name="sortOrder" xsi:type="number">40</item>
                <item name="uploaderConfig" xsi:type="array">
                    <item name="url" xsi:type="url" path="news/index_image/upload"/>
                </item>
            </item>
        </argument>