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
			})
		},