How to clear uniapp mini program WeChat login information

With the rapid development of the Internet, the development of mobile applications has become more and more popular. As different platforms continue to emerge, developers need to constantly learn new technologies and tools. UniApp is a powerful cross-platform framework that allows developers to create applications for multiple platforms with one code base.

In UniApp, some common functions such as WeChat login are already built-in. When users use UniApp to create mini-programs, they can use the built-in WeChat login function to achieve user authentication. However, in some cases, developers may need to clear WeChat login information in mini programs. In this article, we will explain how to clear WeChat login information for mini programs in UniApp.

1. What is WeChat login?

WeChat login is a fast user authentication method provided by the WeChat open platform. Users can log in to an application using their WeChat account, eliminating the need to fill in additional verification information. WeChat login can simplify the user login process and improve user experience.

Developers can use the SDK or open source framework provided by the WeChat open platform to implement WeChat login. UniApp also has a built-in WeChat login function. Developers can call the WeChat login API through code to implement the WeChat login function.

2. Why do you need to clear WeChat login information?

In some cases, developers need to clear the WeChat login information in the mini program, for example:

1. The user chooses to log out, and the WeChat login information needs to be cleared to ensure that the user next time You need to log in again when accessing.
2. When users change their WeChat account, they need to clear their previous login information to allow them to log in with their new WeChat account.
3. Developers need to clear WeChat login information during testing to ensure that each test starts from scratch.
4. In order to ensure the privacy of user information, developers need to clear WeChat login information when users log out of their accounts.

3. How to clear WeChat login information?

To clear WeChat login information, you need to use the APIs provided by uniapp, uni.getProvider and uni.removeStorageSync.

uni.getProvider is used to obtain the login service provider supported by the current system. Since we want to test WeChat login information here, we need to use getProvider to ensure that WeChat login information currently exists.

uni.removeStorageSync is used to delete specified data from local storage.

The following is a sample code that shows how to clear WeChat login information in the mini program:

export default{
  methods:{
    logout(){
      uni.getProvider({
        service:"oauth",
        success: (res) =>{
          if (res.provider.indexOf("weixin") !== -1) {
              uni.removeStorageSync("univerify_weixin");
          }
          console.log("清除成功！");
        },
        fail: (res) =>{
          console.log(res);
        }
      })
    }
  }
}

In this sample code, we use a logout method to clear WeChat login information. This method first uses uni.getProvider to obtain the currently supported login service provider. If the provider contains WeChat (the judgment condition is res.provider.indexOf("weixin") !== -1), then we can use uni.removeStorageSync to clear the WeChat login information.

4. Summary

In UniApp, users can achieve user authentication through the built-in WeChat login function. Sometimes, developers need to clear WeChat login information in mini programs. In order to achieve this goal, developers can use the two APIs uniapp provides, uni.getProvider and uni.removeStorageSync. Through these APIs, we can easily clear the WeChat login information in the mini program to ensure that we need to log in again the next time we visit.

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