Vue3 Spread实例挂在问题

<template>
   <gc-spread-sheets class="spreadHost" @workbookInitialized="initSpread">
    </gc-spread-sheets>
</template>
<script>
import ...

export default {
   name: "App",
   methods: {
      initSpread(v){
        this.spread = v;
      },
      addSheet(){ 
        this.spread.addSheet()
      }
   }
}

initSpread(spread) {        
    this.spreadHost = spread.getHost();
},     
getSpread() {
    var spread = GC.Spread.Sheets.findControl(this.spreadHost);
    // do something
}

designerInitialized(designer) {
    this.designer = designer;
    
}
getSpread() {
    let spread = this.designer.getWorkbook();
    // do something
}