requestTask.onChunkReceived(response => {
    const arrayBuffer = response.data;

    let resultText = '';

    for (let i in arrayBuffer) {
       resultText += String.fromCharCode(arrayBuffer[i]);
    }
    
    console.log(resultText);
});

    var r = ''

    requestTask.onChunkReceived(chunk => {

      const arrayBuffer = chunk.data;

      const uint8Array = new Uint8Array(arrayBuffer);

      const str = new TextEncoding.TextDecoder('utf-8').decode(uint8Array);

      const data = str.split('data: ')

      data.forEach(el=>{

      //排除空字符串和[DONE]

      if (el.startsWith('{')){  

       var json =  JSON.parse(el)

       var text = json.choices[0].delta.content

        if (typeof text === 'string'){

          r +=text

          this.setData({

            typingText:r

          })

       }

      }

      })

    })