//生成分割字符串
		generateDivisionStr() {
		    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
		      let r = Math.random() * 16 | 0,
		        v = c == 'x' ? r : (r & 0x3 | 0x8)
		      return v.toString(16);
		    })
		  },
		  //处理formdata
		generateUploadParams(str,obj,type) {
			let pra = ''
			Object.keys(obj).forEach(key => {
			  //如果是ArrayBuffer类型的图片文件
			  if(key == "file"){
				//随机图片文件名
				let iName = this.generateDivisionStr()
				pra += `\r\n--${str}` +
				`\r\nContent-Disposition: form-data; name="${key}";filename="${iName}.png"` +
				`\r\nContent-Type: "image/${type}"`+
				`\r\n` +
				`\r\n${obj[key]}` 
			  }else{
				pra += `\r\n--${str}` +
				`\r\nContent-Disposition: form-data; name="${key}"` +
				`\r\n` +
				`\r\n${obj[key]}` 
			  }
			})
			pra = pra + `\r\n--${str}--`
			console.log(pra)
			return pra
		  },
	  
        // 上传图片
		fileUploadHandle(e,fieldprop,id,fieldtable){		
			 let extname =  e.tempFiles[0].extname;
			 if(extname != "png" && extname != "jpg"){
			   uni.showToast({
			 	title: '图片必须为jpg或png格式',
			 	icon: 'none',
			 	mask: true,
			 	duration: 2000
			   });
			   return;
			 }
			 let arrayBuffer =wx.getFileSystemManager().readFileSync(e.tempFilePaths[0]);//返回arrayBuffer
		     let base64=wx.getFileSystemManager().readFileSync(e.tempFilePaths[0],'base64');//返回base64
		     let binary=wx.getFileSystemManager().readFileSync(e.tempFilePaths[0],'binary');//返回binary
		     //根据自己需要的数据格式选择
			 let params = { file:base64,excelT:21,tableenname:fieldtable,rowid:id,fieldprop:fieldprop};
			 let str = this.generateDivisionStr()
			 let data = this.generateUploadParams(str,params,e.tempFiles[0].extname)
			 fileUpload(data,str).then((res) =>{
			       uni.showToast({
			       	title: '上传成功',
			       	duration: 2000
			       });
			        }).catch((err) =>{
			         
			        })
		},