How to implement the multi-image upload function of the mini program-Mini Program Development-php.cn

How to implement the multi-image upload function of the mini program

Foreword:

We know that the mini program can only upload one picture at a time, so what should we do if we want to upload multiple pictures at once?

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Recursion is used here. After uploading a picture, re-execute this function until all pictures have been uploaded. , the function will no longer be called.

First, let’s take a look at the two APIs wx.chooseImage(object) and wx.uploadFile(OBJECT)

How to implement the multi-image upload function of the mini program

The sample code is like this:

wx.chooseImage({ success: function(res) { var tempFilePaths = res.tempFilePaths wx.uploadFile({ url: 'http://example.weixin.qq.com/upload', //仅为示例，非真实的接口地址 filePath: tempFilePaths[0], name: 'file', formData:{ 'user': 'test' }, success: function(res){ var data = res.data //do something } }) } })

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The sample code here is to select a picture and then upload the first picture among the selected pictures;

Now start writing multiple pictures Upload example

First of all, we still have to select the picture

wx.chooseImage({ success: function(res) { var tempFilePaths = res.tempFilePaths;//这里是选好的图片的地址，是一个数组 } })

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Then write a method to upload multiple pictures in app.js, which will be introduced later. You can also write it in a JS file , introduced later:

//多张图片上传 function uploadimg(data){ var that=this, i=data.i?data.i:0,//当前上传的哪张图片 success=data.success?data.success:0,//上传成功的个数 fail=data.fail?data.fail:0;//上传失败的个数 wx.uploadFile({ url: data.url, filePath: data.path[i], name: 'file',//这里根据自己的实际情况改 formData:null,//这里是上传图片时一起上传的数据 success: (resp) => { success++;//图片上传成功，图片上传成功的变量+1 console.log(resp) console.log(i); //这里可能有BUG，失败也会执行这里,所以这里应该是后台返回过来的状态码为成功时，这里的success才+1 }, fail: (res) => { fail++;//图片上传失败，图片上传失败的变量+1 console.log('fail:'+i+"fail:"+fail); }, complete: () => { console.log(i); i++;//这个图片执行完上传后，开始上传下一张 if(i==data.path.length){ //当图片传完时，停止调用 console.log('执行完毕'); console.log('成功：'+success+" 失败："+fail); }else{//若图片还没有传完，则继续调用函数 console.log(i); data.i=i; data.success=success; data.fail=fail; that.uploadimg(data); } } }); }

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The method of uploading multiple pictures has been written, and the following is the quote:

var app=getApp(); Page({ data:{ pics:[] }, choose:function(){//这里是选取图片的方法 var that=this,　　　　　　pics=this.data.pics; wx.chooseImage({ count: 9-pics.length, // 最多可以选择的图片张数，默认9 sizeType: ['original', 'compressed'], // original 原图，compressed 压缩图，默认二者都有 sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有 success: function(res){ var imgsrc=res.tempFilePaths; 　　　　　　　　　pics=pics.concat(imgsrc); that.setData({ pics:pics }); }, fail: function() { // fail }, complete: function() { // complete } }) }, uploadimg:function(){//这里触发图片上传的方法 var pics=this.data.pics; app.uploadimg({ url:'https://........',//这里是你图片上传的接口 path:pics//这里是选取的图片的地址数组 }); }, onLoad:function(options){ } })

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I just wrote a node code to upload pictures, and I can use it for personal testing,

A simple PHP receiving code:

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