react 预览pdf 转换

function getReader(response){
  return  new Promise(function(resolve,reject){
    response.blob().then( blob => {
      const reader = new FileReader();
      reader.addEventListener("loadend", function() {
              resolve(reader.result)
      });
      reader.readAsDataURL(blob);  
  })
})
}

async function getFileObjfun (response){
  return await getReader(response);
}

在effects中设置一个转换函数 yield调用上边转换

    *getFileObj({payload},{call,put}){
            const data = yield call(getFileObjfun,payload);
            // console.log(data,"xxxx")
            yield put({
                type: 'savePDf',
                payload:data
            })
        },

来源：https://www.cnblogs.com/chengyunshen/p/11811179.html