according to the weui.js document example;

var uploadCount = 0;
weui.uploader("-sharpuploader", {
   url: "http://localhost:8081",
   auto: true,
   type: "file",
   fileVal: "fileVal",
   compress: {
       width: 1600,
       height: 1600,
       quality: .8
   },
   onBeforeQueued: function(files) {
       // `this` , `files` 

       if(["image/jpg", "image/jpeg", "image/png", "image/gif"].indexOf(this.type) < 0){
           weui.alert("");
           return false; // 
       }
       if(this.size > 10 * 1024 * 1024){
           weui.alert("10M");
           return false;
       }
       if (files.length > 5) { // 
           weui.alert("5");
           return false;
       }
       if (uploadCount + 1 > 5) {
           weui.alert("5");
           return false;
       }

       PPuploadCount;

       // return true; // 
   },
   onQueued: function(){
       console.log(this);

       // console.log(this.status); // :"ready", "progress", "success", "fail"
       // console.log(this.base64); // base64file.base64base64

       // this.upload(); // upload;
       // this.stop(); // 

       // return true; // 
   },
   onBeforeSend: function(data, headers){
       console.log(this, data, headers);
       // $.extend(data, { test: 1 }); // 
       // $.extend(headers, { Origin: "http://127.0.0.1" }); // 

       // return false; // 
   },
   onProgress: function(procent){
       console.log(this, procent);
       // return true; // 
   },
   onSuccess: function (ret) {
       console.log(this, ret);
       // return true; // 
   },
   onError: function(err){
       console.log(this, err);
       // return true; // 
   }
});

does not achieve the manual upload I want.
this.upload (); can upload manually; but I don"t understand.
ask the boss for advice! Thanks!