How to change the top navigation text in uniapp

With the popularity of mobile Internet, the development of mobile applications is becoming more and more common, and uniapp as a cross-platform development framework has also received more and more attention and favor. In uniapp, the top navigation bar is one of the components we often use. In some scenarios, we need to change the text of the top navigation bar to implement some specific functions or enhance the user experience. So how to change the top navigation text in uniapp?

1. Prerequisite knowledge

In the following operations, we need to use some knowledge points of uniapp, including components, life cycle functions, etc. If you are not familiar with uniapp yet, It is recommended to learn the basic knowledge of uniapp before proceeding.

2. Steps

1. Modify the pages.json file

We must first modify the pages.json file, find the page to be modified, and add the navigationBarTitleText field, as shown below :

{
  "path": "pages/index/index",
  "style": {
    "navigationBarTitleText": "首页"
  }
}

The navigationBarTitleText here is the top navigation text we want to change, which can be modified according to actual needs.

2. Modify the page.vue file

In the page.vue file, we can listen to the click event of the top navigation bar through the life cycle function onNavigationBarButtonTap and perform corresponding operations. For example, when clicking the button on the right side of the navigation bar, change the text color and content of the navigation bar title, as shown below:

<template>
  <view>
    <view class="uni-title">{{ title }}</view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      title: '首页'
    }
  },
  methods: {
    changeTitle() {
      this.title = '新标题'
      uni.setNavigationBarTitle({
        title: this.title,
        color: '#FF0000'
      })
    }
  },
  onNavigationBarButtonTap() {
    this.changeTitle()
  }
}
</script>

In this example, we define a variable called title to save the navigation bar title text. In the changeTitle method, we modify the title to the new title text, and then use the uni.setNavigationBarTitle function to change the title text and color of the top navigation bar. Finally, call the changeTitle method in the onNavigationBarButtonTap function to apply the new title text and color to the top navigation bar.

3. Notes

1. If there are multiple pages that need to change the top navigation text, they can be specified separately in pages.json.

2. The uni.setNavigationBarTitle function needs to be called in the onNavigationBarButtonTap function, otherwise it will cause a reference error.

3. The NavigationBarButtonTap event will only be triggered when the button on the right side of the navigation bar is clicked.

4. Summary

Through the above steps, we can realize the function of changing the top navigation text in uniapp. It should be noted that during the development process using uniapp, it is necessary to combine the characteristics of life cycle functions and components to achieve more functions. At the same time, we should also pay attention to the update and optimization of the uniapp framework. Through continuous learning and practice, we can better use uniapp to develop high-quality mobile applications.

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