How to implement download progress bar in WeChat applet-JS Tutorial-php.cn

How to implement download progress bar in WeChat applet

亚连

Release： 2018-06-21 18:34:49

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This article mainly introduces the method of implementing the download progress bar in the WeChat applet. The editor thinks it is quite good, so I will share it with you now and give it as a reference. Let’s follow the editor and take a look.

We often see the download progress bar in APP downloads. This progress bar is for interacting with the user and informing the user of the current progress. Otherwise, the user will be kept waiting. It will crash if you wait more than 1 minute. Today Code Master will teach you how to create a download progress bar in the mini program

The progress bar is a component of the WeChat mini program, and HTML5's progress bar progress is similar.

Introduction to progress attribute

##Attribute nameFunctionParameter valuepercentProgress percentage 0~100show-infoIn progress Display percentage on the right side of the bartrue/false Default falseactiveAnimation of progress bar from left to righttrue /false Default falsestroke-widthThe width of the progress bar line, unit pxDefault 6pxcolorProgress bar color#09BB07activeColorThe color of the selected progress barbackgroundColorThe color of the unselected progress bar

Download progress bar production

1. Wxml view production

<progress percent="100" active=&#39;true&#39; stroke-width="4" />
<view class=&#39;title-line&#39;>
 progress</view>

<view class=&#39;column&#39;>
 <button class=&#39;button&#39; type=&#39;primary&#39; size=&#39;mini&#39; bindtap=&#39;startDown&#39;>开始下载</button>

 <text class="title">下载进度：</text>

 <progress percent="{{percent}}" show-info active=&#39;{{isDown}}&#39; stroke-width="14" />
</view>

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Here we not only teach you how to make a download progress bar, By the way, I will teach you how to make a progress bar during the web page loading process, which is the loading line at the top. Anyway, the principle is the same. The core is still the mini program’s own control progress
active for control Display progress bar animation
percent Set the progress of the selected progress bar
When clicked to start downloading, the startDown event is triggered

2. The code in xxx.js

Page({
 data: {
 isDown: false,
 percent: 0,
},
startDown: function (e) {
 this.setData({
  isDown: true,
  percent: 100,
 })
 },

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js is relatively simple. isDown in data controls whether to start downloading, and percentage sets the download progress bar

startDown handles the logic of starting the download, updates the download progress bar, and starts the download animation effect

Summary

The progress bar has many uses, and the coder just listed the above Two examples. In fact, the progress bar can also be used as a progress bar for rush sales, remaining time for completion, etc. I leave a small homework for the readers. Please complete the other two progress bar examples I listed. Okay, today That’s all about the progress bar.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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