uniapp error

With the continuous popularity of mobile applications, developers have also begun to explore more efficient and convenient development methods. In this context, Uniapp emerged. It is an efficient development tool based on the Vue.js framework. It can write code once and adapt to multiple platforms, including iOS, Android, Web, etc.

However, no matter what development method you use, you will inevitably encounter errors and problems. When developing with Uniapp, you may encounter some common problems. Today we will take a look at some of these Uniapp errors and their solutions.

1. H5 page cannot be accessed
   In Uniapp, the H5 page uses the local debugging environment instead of the real server environment. Therefore, if the H5 page cannot be accessed, there is basically a problem with the file path.

Solution: Open the project in HBuilder, find the manifest.json file, and add a string in the format of "__UNI__XXXXXXXXX" to the "appid" ("X" represents any character) . At this time, re-run the project and the H5 page can be accessed normally.

2. Error when using plug-ins
   Uniapp provides many plug-ins, which can greatly improve development efficiency. However, if you encounter the following problems when using plug-ins, you need to troubleshoot.

a. The plug-in cannot be loaded or used.

Solution: Check whether the plug-in is referenced in the project and installed correctly.

b. When using the plug-in, an undefined variable or function is referenced.

Solution: First check whether there are spelling errors in the code. If not, you can try to reinstall the plug-in, or find other suitable plug-ins.

3. Mini program page jump failed
   In mini programs, page jump is an extremely common operation. But sometimes, various problems will occur when the page jumps.

a. After using the openPage or navigateTo method to jump to the page, the page still stays at the original position.

Solution: Check whether the openPage or navigateTo method is used reasonably in the code, and try to use the native jump method.

b. When using the navigateTo method to jump to a page, the page cannot jump or jump directly to the homepage.

Solution: Check whether there is a jump path error in the code, or try to use other jump methods.

4. Cross-domain request data failed
   Cross-domain request is a security-based policy. In order to ensure the security of data, cross-domain requests are sometimes restricted. When cross-origin requests fail, there are some common solutions.

a. Add the requested URL to "uniCaptcha" in the manifest.json file.

Solution: Add the following code to the manifest.json file:

"uniCaptcha": {

"pattern": [

 "https://example.com/*"

]

}

b. Modify the server's response header information.

Solution: Modify the server's response header information and lift restrictions on cross-domain requests.

Summary
As a complete development framework, Uniapp can greatly improve development efficiency and reduce workload for developers. However, it is inevitable to encounter various errors and problems when using Uniapp. I hope that these Uniapp errors and their solutions introduced in this article can help developers avoid these problems and develop more happily.

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