What should I do if the data on the uniapp mobile terminal cannot be saved in the cache?

In recent years, with the development of mobile Internet, mobile applications have become more and more popular. Correspondingly, the technology of mobile application development is also constantly updated and improved. This article will focus on a common problem, that is, the solution to the problem that uniapp mobile data cannot be cached.

1. Problem description:

In the uniapp mobile application, sometimes the uni.setStorageSync() method is used to store data, but after closing the application and restarting, it is found that the data has not been successfully saved. into the cache, or the data has been cleared. At this time, we need to find the cause of the problem and find a solution.

2. Cause of the problem:

In uniapp mobile applications, we usually use the cache api of uni-app to store data in the application. However, due to limitations of the uni-app framework itself, in some cases we cannot store data in the cache.

This is mainly due to the fact that the caching API of uni-app has been greatly updated and improved after version v3.0.0. After this version, the caching mechanism of uni-app has become more strict and will restrict the entry of some unverified cache data to ensure the stability and security of the application.

3. Solution:

In view of the above problems, we can try the following solutions.

1. Use the uni.setStorage() method

The uni.setStorage method is another data storage method of uniapp. Compared with the uni.setStorageSync() method, it It has wider applicability and can store more types of data. Although its implementation is different from uni.setStorageSync(), it can also realize the data storage function.

2. Update uni-app version

If your uni-app version is relatively low, you can try to upgrade the uni-app version. In the new version, the caching mechanism of uni-app may be modified, and some caching API problems may be fixed.

3. Add whitelist

If the problem that the cache cannot be stored still occurs, we can try to add a whitelist. By adding a whitelist, we can limit which data needs to be cached, thereby preventing some unverified data from entering the cache.

By adding the following code to the manifest.json file:

"app-plus": {
    "cache": {
        "scopes": [{
            "name": "example",
            "match": "/xxx/",
            "queries": [],
            "type": "webview"
            }]
     }
}

Among them, "name" is the name, "match" is the regular match, and "type" is the storage type, which can be window and webview needs to be set according to the situation.

4. Summary:

In uniapp mobile application development, the problem of being unable to store data in the cache is very common. But as we mentioned earlier, this problem can be solved. Through several solutions described in this article, we can effectively solve the problem of uniapp mobile data not being cached, thereby improving the stability and user experience of the application.

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