How to implement H5 mobile code scanning

This time I will show you how to implement H5 mobile phone code scanning, how to use H5 to implement mobile phone code scanning? What are the precautions for H5 mobile phone scanning? The following is a practical case, let’s take a look.

Problems solved:

1. Ability to call up the camera on the Weibo client to scan the QR code and parse it;

2 .Able to scan and parse QR codes in native browsers and WeChat clients;

2. Advantages:

The web side or h5 side can directly complete the scanning work;

3. Disadvantages:

Pictures are not clear and can easily fail to parse (taking pictures to scan pictures requires the lens to be very close to the QR code), compared to the native camera. There will be a 1-2 second delay in parsing.

Instructions:

This plug-in needs to be used with zepto.js or jQuery.js

Usage method:

1. The pages that need to be used should introduce the js files in the lib directory in the following order

<script src="lib/zepto.js"></script>
<script src="lib/qrcode.lib.min.js"></script>
<script src="lib/qrcode.js"></script>

2. Customize the html style of the button

Add customization for the custom buttonAttribute, the attribute name is node-type

Add a custom attribute for the input button, the attribute name is node-type

because the plug-in needs to use 922408e699e05a70eca15e53d4ffbb50, this html structure has a fixed display style on the web page. In order to customize the button style, we can nest the code according to the following sample code structure

<div>
       <div class="qr-btn" node-type="qr-btn">扫描二维码1
           <input node-type="jsbridge" type="file" name="myPhoto" value="扫描二维码1" />
       </div>
   </div>

and then set the input button css hidden button, for example, I am using Attribute Selector

input[node-type=jsbridge]{
    display:none;
}

Here we only need to define the style of class="qr-btn" according to our own needs.

3. Initialize the Qrcode object on the page

//初始化扫描二维码按钮，传入自定义的 node-type 属性
   $(function() {
       Qrcode.init($('[node-type=qr-btn]'));
   });

I believe you have mastered the method after reading these cases. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

Related reading:

How to wake up the app in h5

## Summary of all elements and basic syntax of H5

About how to handle old versions of browsers that are not compatible with H5 and C3

The above is the detailed content of How to implement H5 mobile code scanning. For more information, please follow other related articles on the PHP Chinese website!