app端uni.request，requestType无效

将 uni.request换成uni.downloadFile
// #ifdef H5
let blob = new Blob([ArrayBuffer])
this.codeSrc = URL.createObjectURL(blob)
// #endif
// #ifdef APP-PLUS
uni.downloadFile({url:'',success:res=>{
this.codeSrc = res.tempFilePath
}})
// #endif