Applet in wechat and app get current ()

getCurrentPages() Function to get an instance of the current page stack , Given as an array in the order of stacks , The first element is the home page , The last element is the current page .

Be careful ： getCurrentPages() It is only used to show the page stack , Do not modify the page stack , So as not to cause page status errors .
uniapp Official documents ：https://uniapp.dcloud.io/api/window/window.html#getcurrentpages
Applet official documentation :https://developers.weixin.qq.com/miniprogram/dev/reference/api/getCurrentPages.html

The specific method is described in detail in the official document Here are only the examples used

1. Judge whether the current page enters app Or the first page of the applet , A typical scenario is the sharing page of an applet , The details page shared to users cannot be returned to the home page , Instead, exit the applet directly

const pages = getCurrentPages();
			if(pages.length == 1){
    
				console.log(" The current page is to enter the applet /app The first page of , Logical processing can be done here ")
			}

2. Cross page assignment You can modify the value of the previous page on the current page

let pages = getCurrentPages();// The current page stack 
	if(pages.length>0){
    
		let prevPage = pages[pages.length - 2];// Previous page 
			prevPage.setData({
    
				// Assign a value directly to the previous page 
			});		 
	}		 

3. When I jump to the page , Refresh the existing page , for instance , When switching between multiple languages, refresh the applet or app To update the language text, you need this

uni.switchTab({
    
	url: '/pages/tab/home',
	success: function (e) {
    
		var page = getCurrentPages().pop(); // Current page 
		if (page == undefined || page == null) return;
		page.onLoad(); // Page exists, refresh the current page   Or other operations 
	}   
})

4. Get information about the current page

let pages = getCurrentPages(); // The current page stack 
	// The current page is the last element of the page stack 
	let prevPage = pages[pages.length - 1];// Current page 
	// pop()  Method is used to delete and return the last element of the array   Or use this method to get the current page 
	// let prevPage = pages.pop();// Current page 
	console.log( prevPage.route) // Print the path information of the current page ： Output is ‘pages/tab/home’