How to implement the top tab in UniApp to switch different data

With the popularity of mobile applications, most applications require a tab function so that users can easily switch between different tabs and display different data. In the UniApp framework, switching between different data on the top tab is also very simple. This article will introduce in detail how to implement the function of switching different data on the top tab in UniApp.

1. Basic idea

The idea of switching different data on the top tab in UniApp is very simple, which is to switch different data by clicking on the tab. During implementation, we need to use two components:

• uni-tabs: the tab component that comes with UniApp;
• uni -list-view: List component used to display data.

Among them,uni-tabsis used to display tabs. When the user clicks on a different tab,uni-list-viewwill be displayed based on the tab. is different, the corresponding data is displayed. Next, we will step by step explain how to use these two components to implement the function of switching different data on the top tab.

2. Create the uni-tabs component

First, we create auni-tabscomponent for displaying tabs. The specific code is as follows:

In this code, we create auni-tabscomponent and add threeuni-tabcomponents to it.uni-tabsThe component is a container for tabs and can adapt to the screen size. At the same time, the component also provides some properties and events. Among them, what we need to use is the click event@click. Through this event, we can obtain the information of the tab clicked by the user. Next, we need to process it in thechangeTabmethod to switch tabs.

3. Set up the uni-list-view component

Next, we need to set up auni-list-viewcomponent to display data. The specific code is as follows:

Here, we created auni-list-viewcomponent and set the list data. Specifically, we store the data indata.tab1,data.tab2,data.tab3respectively. When the user clicks on different tabs , we can select the corresponding list data according to the subscript of the tab. It should be noted that in thechangeTabmethod, we use thethis.$refs[this.listViewRef].refresh()method to force refresh the list data.

4. Data rendering

Finally, we need to render the data into theuni-list-viewcomponent. The specific code is as follows:

Here, we use thev-slot:itemtemplate rendering method to achieve data rendering. Specifically, we render the list item data into aviewcomponent using thev-forloop.

In this way, we have successfully implemented the function of switching different data on the top tab using theuni-tabsanduni-list-viewcomponents in UniApp.

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