Promise 同步处理异步进程。

uploadQiniu(imgSource){
    return new Promise((resolve,reject)=>{
      const uptoken  = this.props.uiStore.imgupload.token;
      const file = imgSource;
      const key = null;
      let config = {
        useCdnDomain: false,
        region: null,
        uphost:".........."
      };
      let putExtra = {
        fname: imgSource.name,
        params: {},
        mimeType: ["image/png", "image/jpeg","image/jpg"]
      };
      let observable = qiniu.upload(file, key, uptoken, putExtra, config);
      observable.subscribe({
        next:(res)=>{
        },
        error: (err) => {
          _mutil.errorTips(err);
        },
        complete: (res) => {
          resolve(this.props.uiStore.imgupload.domain + res.hash);
        }
      })
    });
  }

handleFiles(e){
    let imgList = e.target.files;   
    let fileMaxSize = 5000000;
    //promise all 定义的参数数组
    let promiseArr = [];
    for(let i=0;i<imgList.length;i++){
      if(!/image\/\w+/.test(imgList[i].type)){
        _mutil.errorTips("必须上传图片文件!");
        return false;
      }
      if(imgList[i].size <= fileMaxSize){
        promiseArr[i] = this.uploadQiniu(imgList[i]);
      }else{
        _mutil.errorTips(imgList[i].name + "不合要求或文件过大!");
        return false;
      }
    }
    Promise.all(promiseArr).then(result =>{
      let newList = this.state.uploadList.concat(result);
      if(newList.length >= 10){
        _mutil.warningTips("图片最多只能上传10张,自动为您保存10张图!");
        newList.length = 10;
      }
      this.setState({
        uploadList:newList   //[...this.state.uploadList,...result]无返回值
      });
    })
  }