Some styles of uniapp are invalid

In mobile application development, many developers like to use the uniapp framework for rapid development. Compared with other development frameworks, the uniapp framework has better cross-platform performance and can quickly develop applications that can run on multiple platforms. In the uniapp framework, styles are the most basic thing. Some styles can take effect directly, while others will fail.

1. The problem of font size failure in uniapp

In uniapp, the problem of font size failure may occur in some cases. For example, when we try to set the font size to 14px in a view tag, we find that the font size does not change after outputting to the page. If we open the WeChat browser in the application to view, we will also find this problem.

Solution: This problem generally occurs when the font size is set too small. We can solve this problem by adjusting the font size to 16px and above.

2. The problem of external style sheet failure in uniapp

The use of external style sheets is essential in our daily development. We can combine multiple styles into one CSS file to reduce code duplication. In uniapp, if we write the style into a separate CSS file, it is likely to fail.

Solution: In uniapp, we need to write the style directly into the vue file, and then use the style in this vue file as an external style sheet. In this way, the style sheet can take effect.

3. Z-index failure problem in uniapp

Z-index is an attribute that controls the stacking order and is often used to control the display level of page elements. But in uniapp, we may encounter the problem of z-index failure.

Solution: In uniapp, we need to first determine whether the positioning type of the element to be controlled is absolute, fixed or relative. Only under these position types, the z-index attribute value will take effect. If the element's positioning type is static, z-index will fail.

4. The problem of invalidation of custom icons in uniapp

In uniapp, we can use custom icons to replace regular icons. This kind of icon can improve the personalization of the application, but in actual applications, there is likely to be a problem that the custom icon cannot take effect.

Solution: In order to make the custom icon take effect, we need to add an iconfont to the project. Then, reference iconfont where you need to use the custom icon. In this way, the custom icon style will take effect.

Summary: In the uniapp framework, style is a very important part and can affect the display effect of the application. For some common style failure problems, we need to follow appropriate methods to solve them. I hope that the solutions to the above problems can help developers who are using the uniapp framework to develop applications.

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