uniapp封装promise图片上传方法（ts版，js的话把参数类型去掉就行）

第一步：新建文件夹services

第二步：新建文件request.ts

//服务器接口地址
 const baseURL:string='http://xxxxxx' 
 //本地调试接口地址
// const baseURL:string='http://xxxxxx'

    // 封装公共上传图片
    function upload(num:number,imglength:number,type?:string | undefined ) { //num表示限制图片上传数量 imglength表示已经上传图片的数量
            let uploads :any[] = [];
             return new Promise(function(presolve, preject){
                 let sourceType:string[];
                 if(type==undefined){
                     sourceType = ['album','camera']
                 }else if(type=='album'){
                      sourceType = ['album']
                 }else if(type=='camera'){
                       sourceType = ['camera']
                 }
                 uni.chooseImage({
                     count: num-imglength,
                     sizeType: ['compressed'],
                     sourceType: sourceType,
                     success(res: any) {
                         uni.showLoading({
                             title: '上传中...',
                             mask: true,
                         })
                         for (var i = 0; i < res.tempFilePaths.length; i++) {
                             // console.log(res.tempFilePaths[i])
                             uploads[i] = new Promise(function(resolve, reject){
                                 uni.uploadFile({
                                     url: baseURL +'/customer/upload_file',
                                     filePath: res.tempFilePaths[i],
                                     name: 'file',
                                     header: {
                                         'content-type': 'application/json',
                                         "X-Auth-Token": uni.getStorageSync('token')
                                     },
                                     success(res: any) {
                                         uni.hideLoading()
                                         resolve(JSON.parse(res.data).payload);
                                     },
                                     fail(err: any) {
                                         uni.showToast({
                                             title:err
                                         })
                                         console.log(err);
                                     }
                                 })
                             })
                         }
                        Promise.all(uploads).then(res=>{
                          //图片上传完成
                          presolve(res)
                          wx.hideLoading()
                        }).catch(err=>{
                          preject(err)
                          wx.hideLoading()
                          wx.showToast({
                            title:'上传失败请重试',
                            icon:'none'
                          })
                        })
                     }
                 })
             })
        }


export {upload,baseURL}

需要的文件.vue引入需要的接口

<script lang="ts">
    import { upload} from '../../../services/request';
    export default Vue.extend({
        data() {
            return {
                img:[]
            }
        },

        methods: {
             async uploadImg() {
               const imgFile: any = await upload(9,this.img.length)
                this.img = this.img.concat(imgFile)

            },
        },

    });
</script>