How to use Uniapp to implement the WeChat card and coupon collection function

With the increasing popularity of electronic methods such as mobile payments and electronic coupons, more and more companies are beginning to use WeChat coupons as a marketing tool for promotion. In recent years, the popularity of Uniapp has also attracted the attention of more and more developers and enterprises, because it can achieve the purpose of one-time development and simultaneous release on multiple platforms, and supports various forms such as H5, mini programs, and APPs. So, this article will discuss how to use Uniapp to implement the WeChat coupon collection function.

1. Types of WeChat cards and coupons

WeChat cards and coupons are mainly divided into five types, namely: vouchers, discount coupons, exchange coupons, coupons and group purchase coupons. Among them, vouchers and discount coupons are used more frequently, followed by exchange coupons, and the other two are relatively rare. During the development process, we can choose the appropriate card and coupon type according to our needs.

2. The principle of receiving WeChat cards and coupons

The principle of receiving WeChat cards and coupons is: users can receive “card coupons” through the channels provided by merchants (WeChat official accounts, mini programs, etc.) " link. After clicking the link, you will jump to WeChat's card and coupon collection page. After selecting the number to receive on the page, WeChat will send the card and coupon to the user and automatically save the card and coupon to the user's WeChat card package.

3. Steps to receive WeChat cards and coupons in Uniapp

1. Create a merchant account

Before using the function of receiving WeChat cards and coupons, you need to first Apply for a merchant account for WeChat Pay. On the WeChat payment official website, after entering relevant information and uploading materials, you can obtain a merchant number after review. The merchant number is a necessary condition for subsequent WeChat payment or WeChat card and coupon collection.

2. Create WeChat Cards and Vouchers

In the WeChat public platform or mini program background, select the "Cards and Vouchers" module to create one or more cards according to your needs Coupon, and set related properties, such as coupon type, validity period, usage instructions, etc.

3. Get the card and coupon ID

After the creation is successful, the ID of the card and coupon needs to be recorded for subsequent use when making a claim request. If you need to issue large-scale cards and coupons, you need to apply for the card and coupon issuance capability through the WeChat public platform or mini program platform, and obtain information such as API keys and interface addresses.

4. Realize card and coupon collection

To implement card and coupon collection in Uniapp, you can call the open interface of WeChat payment. The specific steps are as follows:

( 1) Obtain the openid and access_token of the current user

If you receive it in the public account environment, you need to obtain the openid of the current user, and use this openid to obtain the access_token; if you receive it in the mini program environment, you can directly use JS -wx.login() provided in the SDK obtains the openid and access_token of the current user.

(2) Construct the URL for receiving cards and coupons

The URL is constructed as follows:

https://api.weixin.qq.com/card/qrcode/create?access_token={access_token}

Among them, access_token is the access_token obtained. For the specific calling method, please refer to WeChat official Document https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421141115.

(3) Call the WeChat Payment API

Use the uni.request() method to send a request to the WeChat Payment API to obtain the result of receiving the card and coupon. The results include ticket information and other information for subsequent collection operations.

(4) Generate a card and coupon collection page

According to the ticket to receive the card and coupon, a card and coupon collection page can be generated. The page needs to display the name, description, usage rules, etc. of the card and coupon. information, and the quantity selected by the user. Pages can be built using uni-app's component library and can be used normally in mini programs or H5 environments.

(5) Card and coupon sending and saving

After the user completes the selection on the page, click the "Receive" button, call the WeChat payment API, and send the collection information to the WeChat server, and the server will automatically Send card and coupon information to users. After the user receives the coupon, the coupon will be automatically saved to the WeChat card wallet.

4. Summary

This article introduces how to use Uniapp to realize the function of receiving WeChat cards and coupons. The realization of this function can be realized by calling the WeChat payment API, which mainly includes the creation of merchant accounts and card and coupon creation. , card and coupon ID acquisition, URL construction, collection page generation and other steps. When developing, you need to pay attention to data security and user experience, and ensure that the details are handled as perfectly as possible.

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