How does Mini Program download pictures and display the progress of the page effect?

This article introduces the knowledge of "how Mini Program can download pictures and display the page effect of progress". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations! I hope you can read it carefully and be able to achieve something!

Picture effect

Wxml

Js

1 downImg: function (e) {2 var _ this = this;34 / / get the image address (http://www.playsort.cn/...)5 var img = e.currentTarget.dataset.src 67 / / download listening progress 8 const downloadTask = wx.downloadFile ({9 url: img,10 success: function (res) {11 / / as long as the server has response data, the response content will be written to the file and entered into the success callback The business needs to determine whether the desired content has been downloaded 12 console.log (res) 13 if (res.statusCode = 200) {14 wx.saveImageToPhotosAlbum ({15 filePath: res.tempFilePath,16 success: function (res) {17 wx.showToast ({18 title: 'saved image successfully!', 19}) 20}, 21 fail: function (res) {22 wx.showToast ({23 title: 'failed to save picture! ~', 24}); 25} 26}) 27} 28} 29}); 30 downloadTask.onProgressUpdate ((res) = > {31 if (res.progress = 100) {32 this.setData ({33 progress:'34}); 35} else {36 this.setData ({37 progress: res.progress +'%'38}); 39} 40}) 41} this is the end of the content of "how Mini Program can download pictures and display the progress of the page". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!