参考:https://blog.csdn.net/qq_38210427/article/details/141264052
一图标在前,在后的写法

            
            
              cpp
              
              
            
          
           <el-button type="primary" :icon="Search">Search</el-button>
    
 
<el-button type="primary">
      Upload<el-icon class="el-icon--right"><Upload /></el-icon>
</el-button>