How does uniapp app determine which page it is currently on?

uniapp is an open source cross-platform application development framework based on the Vue.js framework, which can quickly build efficient mobile applications. When developing and using uniapp, we often encounter the need to determine the current page. So in uniapp, how to determine which page is currently?

In uniapp, you can judge the current page through the uni-app built-in API.

1. Get the current page information

To get the current page information, you need to use the uni.getCurrentPages()API provided by uni-app. This API will return an array of instances of the current page stack, that is, instances of all pages displayed sequentially starting from the bottom of the stack.

The sample code is as follows:

let pages = getCurrentPages()
let currentPage = pages[pages.length-1]
let url = currentPage.route
console.log(url)

In this code, we first obtain the information of the current page stack through getCurrentPages(), and then through pages[ pages.length-1]obtains the page instance at the top of the stack, and finally obtains the routing information of the current page through currentPage.route.

2. Judge whether the current page is a certain page

By obtaining the routing information of the current page, we can judge whether the current page is a certain page. For example, we can obtain the routing information of the current page in onLoad(), and then determine whether the current page is the specified page. If so, perform the corresponding operation.

The sample code is as follows:

onLoad(){
    let pages = getCurrentPages()
    let currentPage = pages[pages.length-1]
    let url = currentPage.route
    if(url == '/pages/index/index'){
        console.log('当前页面是首页')
    }
}

In this code, we obtain the routing information of the current page in the onLoad() life cycle and pass if Determine whether the current page is the /pages/index/index page, if so, output The current page is the homepage.

3. Listen to the page life cycle to determine the current page

Since uniapp provides rich event callback functions in the page life cycle, we can also listen to page life cycle events. To determine whether the current page is the specified page.

The sample code is as follows:

onShow(){
    let pages = getCurrentPages()
    let currentPage = pages[pages.length-1]
    let url = currentPage.route
    if(url == '/pages/index/index'){
        console.log('当前页面是首页')
    }
}

In this code, we obtain the routing information of the current page in the onShow() life cycle and pass if Determine whether the current page is the /pages/index/index page, if so, output The current page is the homepage.

Summary

Through the above three methods, we can quickly obtain the current page information and determine whether the current page is a certain page. In actual application development, according to specific needs, we can choose the corresponding method to judge the current page.

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